transCli.c 82.6 KB
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/** Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "transComm.h"

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typedef struct {
  int32_t numOfConn;
  queue   msgQ;
} SMsgList;

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typedef struct SConnList {
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  queue     conns;
  int32_t   size;
  SMsgList* list;
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} SConnList;

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typedef struct {
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  queue   wq;
  int32_t len;

  int connMax;
  int connCnt;
  int batchLenLimit;
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  int sending;
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  char*    dst;
  char*    ip;
  uint16_t port;
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} SCliBatchList;

typedef struct {
  queue          wq;
  queue          listq;
  int32_t        wLen;
  int32_t        batchSize;  //
  int32_t        batch;
  SCliBatchList* pList;
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} SCliBatch;
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typedef struct SCliConn {
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  T_REF_DECLARE()
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  uv_connect_t connReq;
  uv_stream_t* stream;
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  queue        wreqQueue;
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  uv_timer_t* timer;  // read timer, forbidden
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  void* hostThrd;

  SConnBuffer readBuf;
  STransQueue cliMsgs;
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  queue      q;
  SConnList* list;
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  STransCtx  ctx;
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  bool       broken;  // link broken or not
  ConnStatus status;  //
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  SCliBatch* pBatch;

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  SDelayTask* task;
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  char* ip;
  char  src[32];
  char  dst[32];
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  int64_t refId;
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} SCliConn;
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typedef struct SCliMsg {
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  STransConnCtx* ctx;
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  STransMsg      msg;
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  queue          q;
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  STransMsgType  type;
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  int64_t  refId;
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  uint64_t st;
  int      sent;  //(0: no send, 1: alread sent)
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} SCliMsg;

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typedef struct SCliThrd {
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  TdThread      thread;  // tid
  int64_t       pid;     // pid
  uv_loop_t*    loop;
  SAsyncPool*   asyncPool;
  uv_prepare_t* prepare;
  void*         pool;  // conn pool
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  // timer handles
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  SArray* timerList;
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  // msg queue
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  queue         msg;
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  TdThreadMutex msgMtx;
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  SDelayQueue*  delayQueue;
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  SDelayQueue*  timeoutQueue;
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  SDelayQueue*  waitConnQueue;
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  uint64_t      nextTimeout;  // next timeout
  void*         pTransInst;   //
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  int connCount;
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  void (*destroyAhandleFp)(void* ahandle);
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  SHashObj* fqdn2ipCache;
  SCvtAddr  cvtAddr;
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  SHashObj* failFastCache;
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  SHashObj* batchCache;
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  SCliMsg* stopMsg;

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  bool quit;
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  int       newConnCount;
  SHashObj* msgCount;
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} SCliThrd;
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typedef struct SCliObj {
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  char       label[TSDB_LABEL_LEN];
  int32_t    index;
  int        numOfThreads;
  SCliThrd** pThreadObj;
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} SCliObj;
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typedef struct {
  int32_t reinit;
  int64_t timestamp;
  int32_t count;
  int32_t threshold;
  int64_t interval;
} SFailFastItem;
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// conn pool
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// add expire timeout and capacity limit
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static void*     createConnPool(int size);
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static void*     destroyConnPool(SCliThrd* thread);
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static SCliConn* getConnFromPool(SCliThrd* thread, char* key, bool* exceed);
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static void      addConnToPool(void* pool, SCliConn* conn);
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static void      doCloseIdleConn(void* param);
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// register conn timer
static void cliConnTimeout(uv_timer_t* handle);
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// register timer for read
static void cliReadTimeoutCb(uv_timer_t* handle);
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// register timer in each thread to clear expire conn
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// static void cliTimeoutCb(uv_timer_t* handle);
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// alloc buffer for recv
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static FORCE_INLINE void cliAllocRecvBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
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// callback after recv nbytes from socket
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static void cliRecvCb(uv_stream_t* cli, ssize_t nread, const uv_buf_t* buf);
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// callback after send data to socket
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static void cliSendCb(uv_write_t* req, int status);
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// callback after conn to server
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static void cliConnCb(uv_connect_t* req, int status);
static void cliAsyncCb(uv_async_t* handle);
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static void cliIdleCb(uv_idle_t* handle);
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static void cliPrepareCb(uv_prepare_t* handle);
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static void cliHandleBatchReq(SCliBatch* pBatch, SCliThrd* pThrd);
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static void cliSendBatchCb(uv_write_t* req, int status);
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SCliBatch* cliGetHeadFromList(SCliBatchList* pList);
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static bool cliRecvReleaseReq(SCliConn* conn, STransMsgHead* pHead);

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static int32_t allocConnRef(SCliConn* conn, bool update);
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static int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg);
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static SCliConn* cliCreateConn(SCliThrd* thrd);
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static void      cliDestroyConn(SCliConn* pConn, bool clear /*clear tcp handle or not*/);
static void      cliDestroy(uv_handle_t* handle);
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static void      cliSend(SCliConn* pConn);
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static void      cliSendBatch(SCliConn* pConn);
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static void      cliDestroyConnMsgs(SCliConn* conn, bool destroy);
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static void    doFreeTimeoutMsg(void* param);
static int32_t cliPreCheckSessionLimitForMsg(SCliThrd* pThrd, char* addr, SCliMsg** pMsg);
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// cli util func
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static FORCE_INLINE bool cliIsEpsetUpdated(int32_t code, STransConnCtx* pCtx);
static FORCE_INLINE void cliMayCvtFqdnToIp(SEpSet* pEpSet, SCvtAddr* pCvtAddr);
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static FORCE_INLINE int32_t cliBuildExceptResp(SCliMsg* pMsg, STransMsg* resp);
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static FORCE_INLINE uint32_t cliGetIpFromFqdnCache(SHashObj* cache, char* fqdn);
static FORCE_INLINE void     cliUpdateFqdnCache(SHashObj* cache, char* fqdn);

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// process data read from server, add decompress etc later
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static void cliHandleResp(SCliConn* conn);
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// handle except about conn
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static void cliHandleExcept(SCliConn* conn);
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static void cliReleaseUnfinishedMsg(SCliConn* conn);
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static void cliHandleFastFail(SCliConn* pConn, int status);
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static void doNotifyApp(SCliMsg* pMsg, SCliThrd* pThrd);
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// handle req from app
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static void cliHandleReq(SCliMsg* pMsg, SCliThrd* pThrd);
static void cliHandleQuit(SCliMsg* pMsg, SCliThrd* pThrd);
static void cliHandleRelease(SCliMsg* pMsg, SCliThrd* pThrd);
static void cliHandleUpdate(SCliMsg* pMsg, SCliThrd* pThrd);
static void (*cliAsyncHandle[])(SCliMsg* pMsg, SCliThrd* pThrd) = {cliHandleReq, cliHandleQuit, cliHandleRelease, NULL,
                                                                   cliHandleUpdate};
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/// static void (*cliAsyncHandle[])(SCliMsg* pMsg, SCliThrd* pThrd) = {cliHandleReq, cliHandleQuit, cliHandleRelease,
/// NULL,cliHandleUpdate};
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static FORCE_INLINE void destroyUserdata(STransMsg* userdata);
static FORCE_INLINE void destroyCmsg(void* cmsg);
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static FORCE_INLINE void destroyCmsgAndAhandle(void* cmsg);
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static FORCE_INLINE int  cliRBChoseIdx(STrans* pTransInst);
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static FORCE_INLINE void transDestroyConnCtx(STransConnCtx* ctx);
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// thread obj
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static SCliThrd* createThrdObj(void* trans);
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static void      destroyThrdObj(SCliThrd* pThrd);
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static void cliWalkCb(uv_handle_t* handle, void* arg);

#define CLI_RELEASE_UV(loop)        \
  do {                              \
    uv_walk(loop, cliWalkCb, NULL); \
    uv_run(loop, UV_RUN_DEFAULT);   \
    uv_loop_close(loop);            \
  } while (0);

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// snprintf may cause performance problem
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#define CONN_CONSTRUCT_HASH_KEY(key, ip, port) \
  do {                                         \
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    char*   t = key;                           \
    int16_t len = strlen(ip);                  \
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    if (ip != NULL) memcpy(t, ip, len);        \
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    t[len] = ':';                              \
    titoa(port, 10, &t[len + 1]);              \
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  } while (0)

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#define CONN_PERSIST_TIME(para)   ((para) <= 90000 ? 90000 : (para))
#define CONN_GET_INST_LABEL(conn) (((STrans*)(((SCliThrd*)(conn)->hostThrd)->pTransInst))->label)
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#define CONN_GET_MSGCTX_BY_AHANDLE(conn, ahandle)                         \
  do {                                                                    \
    int i = 0, sz = transQueueSize(&conn->cliMsgs);                       \
    for (; i < sz; i++) {                                                 \
      pMsg = transQueueGet(&conn->cliMsgs, i);                            \
      if (pMsg->ctx != NULL && (uint64_t)pMsg->ctx->ahandle == ahandle) { \
        break;                                                            \
      }                                                                   \
    }                                                                     \
    if (i == sz) {                                                        \
      pMsg = NULL;                                                        \
      tDebug("msg not found, %" PRIu64 "", ahandle);                      \
    } else {                                                              \
      pMsg = transQueueRm(&conn->cliMsgs, i);                             \
      tDebug("msg found, %" PRIu64 "", ahandle);                          \
    }                                                                     \
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  } while (0)
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#define CONN_GET_NEXT_SENDMSG(conn)                 \
  do {                                              \
    int i = 0;                                      \
    do {                                            \
      pCliMsg = transQueueGet(&conn->cliMsgs, i++); \
      if (pCliMsg && 0 == pCliMsg->sent) {          \
        break;                                      \
      }                                             \
    } while (pCliMsg != NULL);                      \
    if (pCliMsg == NULL) {                          \
      goto _RETURN;                                 \
    }                                               \
  } while (0)
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#define CONN_SET_PERSIST_BY_APP(conn) \
  do {                                \
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    if (conn->status == ConnNormal) { \
      conn->status = ConnAcquire;     \
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      transRefCliHandle(conn);        \
    }                                 \
  } while (0)
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#define CONN_NO_PERSIST_BY_APP(conn) \
  (((conn)->status == ConnNormal || (conn)->status == ConnInPool) && T_REF_VAL_GET(conn) == 1)
#define CONN_RELEASE_BY_SERVER(conn) \
  (((conn)->status == ConnRelease || (conn)->status == ConnInPool) && T_REF_VAL_GET(conn) == 1)
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#define REQUEST_NO_RESP(msg)         ((msg)->info.noResp == 1)
#define REQUEST_PERSIS_HANDLE(msg)   ((msg)->info.persistHandle == 1)
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#define REQUEST_RELEASE_HANDLE(cmsg) ((cmsg)->type == Release)
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#define EPSET_IS_VALID(epSet)       ((epSet) != NULL && (epSet)->numOfEps >= 0 && (epSet)->inUse >= 0)
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#define EPSET_GET_SIZE(epSet)       (epSet)->numOfEps
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#define EPSET_GET_INUSE_IP(epSet)   ((epSet)->eps[(epSet)->inUse].fqdn)
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#define EPSET_GET_INUSE_PORT(epSet) ((epSet)->eps[(epSet)->inUse].port)
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#define EPSET_FORWARD_INUSE(epSet)                             \
  do {                                                         \
    if ((epSet)->numOfEps != 0) {                              \
      ++((epSet)->inUse);                                      \
      (epSet)->inUse = ((epSet)->inUse) % ((epSet)->numOfEps); \
    }                                                          \
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  } while (0)
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#define EPSET_DEBUG_STR(epSet, tbuf)                                                                                   \
  do {                                                                                                                 \
    int len = snprintf(tbuf, sizeof(tbuf), "epset:{");                                                                 \
    for (int i = 0; i < (epSet)->numOfEps; i++) {                                                                      \
      if (i == (epSet)->numOfEps - 1) {                                                                                \
        len += snprintf(tbuf + len, sizeof(tbuf) - len, "%d. %s:%d", i, (epSet)->eps[i].fqdn, (epSet)->eps[i].port);   \
      } else {                                                                                                         \
        len += snprintf(tbuf + len, sizeof(tbuf) - len, "%d. %s:%d, ", i, (epSet)->eps[i].fqdn, (epSet)->eps[i].port); \
      }                                                                                                                \
    }                                                                                                                  \
    len += snprintf(tbuf + len, sizeof(tbuf) - len, "}, inUse:%d", (epSet)->inUse);                                    \
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  } while (0);
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static void* cliWorkThread(void* arg);
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static void cliReleaseUnfinishedMsg(SCliConn* conn) {
  SCliThrd* pThrd = conn->hostThrd;

  for (int i = 0; i < transQueueSize(&conn->cliMsgs); i++) {
    SCliMsg* msg = transQueueGet(&conn->cliMsgs, i);
    if (msg != NULL && msg->ctx != NULL && msg->ctx->ahandle != (void*)0x9527) {
      if (conn->ctx.freeFunc != NULL && msg->ctx->ahandle != NULL) {
        conn->ctx.freeFunc(msg->ctx->ahandle);
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      } else if (msg->ctx->ahandle != NULL && pThrd->destroyAhandleFp != NULL) {
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        tDebug("%s conn %p destroy unfinished ahandle %p", CONN_GET_INST_LABEL(conn), conn, msg->ctx->ahandle);
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        pThrd->destroyAhandleFp(msg->ctx->ahandle);
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      }
    }
    destroyCmsg(msg);
  }
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  transQueueClear(&conn->cliMsgs);
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  memset(&conn->ctx, 0, sizeof(conn->ctx));
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}
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bool cliMaySendCachedMsg(SCliConn* conn) {
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  if (!transQueueEmpty(&conn->cliMsgs)) {
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    SCliMsg* pCliMsg = NULL;
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    CONN_GET_NEXT_SENDMSG(conn);
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    cliSend(conn);
    return true;
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  }
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  return false;
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_RETURN:
  return false;
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}
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void cliHandleResp(SCliConn* conn) {
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  SCliThrd* pThrd = conn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;
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  if (conn->timer) {
    if (uv_is_active((uv_handle_t*)conn->timer)) {
      tDebug("%s conn %p stop timer", CONN_GET_INST_LABEL(conn), conn);
      uv_timer_stop(conn->timer);
    }
    taosArrayPush(pThrd->timerList, &conn->timer);
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    conn->timer->data = NULL;
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    conn->timer = NULL;
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  }

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opt rpc  
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  STransMsgHead* pHead = NULL;
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  int32_t msgLen = transDumpFromBuffer(&conn->readBuf, (char**)&pHead);
  if (msgLen <= 0) {
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    taosMemoryFree(pHead);
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    tDebug("%s conn %p recv invalid packet ", CONN_GET_INST_LABEL(conn), conn);
    return;
  }
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  if (transDecompressMsg((char**)&pHead, msgLen) < 0) {
    tDebug("%s conn %p recv invalid packet, failed to decompress", CONN_GET_INST_LABEL(conn), conn);
  }
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  pHead->code = htonl(pHead->code);
  pHead->msgLen = htonl(pHead->msgLen);
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  if (cliRecvReleaseReq(conn, pHead)) {
    return;
  }

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  STransMsg transMsg = {0};
  transMsg.contLen = transContLenFromMsg(pHead->msgLen);
  transMsg.pCont = transContFromHead((char*)pHead);
  transMsg.code = pHead->code;
  transMsg.msgType = pHead->msgType;
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  transMsg.info.ahandle = NULL;
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  transMsg.info.traceId = pHead->traceId;
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  transMsg.info.hasEpSet = pHead->hasEpSet;
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  SCliMsg*       pMsg = NULL;
  STransConnCtx* pCtx = NULL;
  if (CONN_NO_PERSIST_BY_APP(conn)) {
    pMsg = transQueuePop(&conn->cliMsgs);
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    pCtx = pMsg ? pMsg->ctx : NULL;
    transMsg.info.ahandle = pCtx ? pCtx->ahandle : NULL;
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    tDebug("%s conn %p get ahandle %p, persist: 0", CONN_GET_INST_LABEL(conn), conn, transMsg.info.ahandle);
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  } else {
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    uint64_t ahandle = (uint64_t)pHead->ahandle;
    CONN_GET_MSGCTX_BY_AHANDLE(conn, ahandle);
    if (pMsg == NULL) {
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      transMsg.info.ahandle = transCtxDumpVal(&conn->ctx, transMsg.msgType);
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      tDebug("%s conn %p construct ahandle %p by %s, persist: 1", CONN_GET_INST_LABEL(conn), conn,
             transMsg.info.ahandle, TMSG_INFO(transMsg.msgType));
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      if (!CONN_RELEASE_BY_SERVER(conn) && transMsg.info.ahandle == NULL) {
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        transMsg.code = TSDB_CODE_RPC_BROKEN_LINK;
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        transMsg.info.ahandle = transCtxDumpBrokenlinkVal(&conn->ctx, (int32_t*)&(transMsg.msgType));
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        tDebug("%s conn %p construct ahandle %p due brokenlink, persist: 1", CONN_GET_INST_LABEL(conn), conn,
               transMsg.info.ahandle);
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      }
    } else {
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      pCtx = pMsg->ctx;
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      transMsg.info.ahandle = pCtx ? pCtx->ahandle : NULL;
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      tDebug("%s conn %p get ahandle %p, persist: 1", CONN_GET_INST_LABEL(conn), conn, transMsg.info.ahandle);
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    }
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  }
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  // buf's mem alread translated to transMsg.pCont
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  if (!CONN_NO_PERSIST_BY_APP(conn)) {
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    transMsg.info.handle = (void*)conn->refId;
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    tDebug("%s conn %p ref by app", CONN_GET_INST_LABEL(conn), conn);
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  }
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  STraceId* trace = &transMsg.info.traceId;
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  tGDebug("%s conn %p %s received from %s, local info:%s, len:%d, code str:%s", CONN_GET_INST_LABEL(conn), conn,
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          TMSG_INFO(pHead->msgType), conn->dst, conn->src, pHead->msgLen, tstrerror(transMsg.code));
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  if (pCtx == NULL && CONN_NO_PERSIST_BY_APP(conn)) {
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    tDebug("%s except, conn %p read while cli ignore it", CONN_GET_INST_LABEL(conn), conn);
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    transFreeMsg(transMsg.pCont);
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    return;
  }
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  if (CONN_RELEASE_BY_SERVER(conn) && transMsg.info.ahandle == NULL) {
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    tDebug("%s except, conn %p read while cli ignore it", CONN_GET_INST_LABEL(conn), conn);
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    transFreeMsg(transMsg.pCont);
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    return;
  }
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  if (pMsg == NULL || (pMsg && pMsg->type != Release)) {
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    if (cliAppCb(conn, &transMsg, pMsg) != 0) {
      return;
    }
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  }
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  destroyCmsg(pMsg);

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  if (cliMaySendCachedMsg(conn) == true) {
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    return;
  }
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  if (CONN_NO_PERSIST_BY_APP(conn)) {
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    return addConnToPool(pThrd->pool, conn);
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  }
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test  
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  uv_read_start((uv_stream_t*)conn->stream, cliAllocRecvBufferCb, cliRecvCb);
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}
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void cliHandleExceptImpl(SCliConn* pConn, int32_t code) {
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  if (transQueueEmpty(&pConn->cliMsgs)) {
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    if (pConn->broken == true && CONN_NO_PERSIST_BY_APP(pConn)) {
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      tTrace("%s conn %p handle except, persist:0", CONN_GET_INST_LABEL(pConn), pConn);
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      if (T_REF_VAL_GET(pConn) > 1) transUnrefCliHandle(pConn);
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formate  
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      transUnrefCliHandle(pConn);
      return;
    }
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  }
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  SCliThrd* pThrd = pConn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;
  bool      once = false;
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  do {
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    SCliMsg* pMsg = transQueuePop(&pConn->cliMsgs);
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enh log  
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    if (pMsg == NULL && once) {
      break;
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    }
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enh log  
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    if (pMsg != NULL && REQUEST_NO_RESP(&pMsg->msg)) {
      destroyCmsg(pMsg);
      break;
    }

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    STransConnCtx* pCtx = pMsg ? pMsg->ctx : NULL;
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    STransMsg transMsg = {0};
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    transMsg.code = code == -1 ? (pConn->broken ? TSDB_CODE_RPC_BROKEN_LINK : TSDB_CODE_RPC_NETWORK_UNAVAIL) : code;
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    transMsg.msgType = pMsg ? pMsg->msg.msgType + 1 : 0;
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    transMsg.info.ahandle = NULL;
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    if (pMsg == NULL && !CONN_NO_PERSIST_BY_APP(pConn)) {
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      transMsg.info.ahandle = transCtxDumpVal(&pConn->ctx, transMsg.msgType);
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      tDebug("%s conn %p construct ahandle %p by %s", CONN_GET_INST_LABEL(pConn), pConn, transMsg.info.ahandle,
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             TMSG_INFO(transMsg.msgType));
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      if (transMsg.info.ahandle == NULL) {
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        int32_t msgType = 0;
        transMsg.info.ahandle = transCtxDumpBrokenlinkVal(&pConn->ctx, &msgType);
        transMsg.msgType = msgType;
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        tDebug("%s conn %p construct ahandle %p due to brokenlink", CONN_GET_INST_LABEL(pConn), pConn,
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               transMsg.info.ahandle);
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      }
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    } else {
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      transMsg.info.ahandle = (pMsg != NULL && pMsg->type != Release && pCtx) ? pCtx->ahandle : NULL;
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    }

    if (pCtx == NULL || pCtx->pSem == NULL) {
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      if (transMsg.info.ahandle == NULL) {
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        if (pMsg == NULL || REQUEST_NO_RESP(&pMsg->msg) || pMsg->type == Release) {
          destroyCmsg(pMsg);
          once = true;
          continue;
        }
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      }
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    }
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enh log  
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    if (pMsg == NULL || (pMsg && pMsg->type != Release)) {
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      if (cliAppCb(pConn, &transMsg, pMsg) != 0) {
        return;
      }
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    }
    destroyCmsg(pMsg);
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    tTrace("%s conn %p start to destroy, ref:%d", CONN_GET_INST_LABEL(pConn), pConn, T_REF_VAL_GET(pConn));
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  } while (!transQueueEmpty(&pConn->cliMsgs));
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  if (T_REF_VAL_GET(pConn) > 1) transUnrefCliHandle(pConn);
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  transUnrefCliHandle(pConn);
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}
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void cliHandleExcept(SCliConn* conn) {
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  tTrace("%s conn %p except ref:%d", CONN_GET_INST_LABEL(conn), conn, T_REF_VAL_GET(conn));
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  cliHandleExceptImpl(conn, -1);
}
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void cliConnTimeout(uv_timer_t* handle) {
  SCliConn* conn = handle->data;
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  SCliThrd* pThrd = conn->hostThrd;

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  tTrace("%s conn %p conn timeout, ref:%d", CONN_GET_INST_LABEL(conn), conn, T_REF_VAL_GET(conn));
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  uv_timer_stop(handle);
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  handle->data = NULL;
  taosArrayPush(pThrd->timerList, &conn->timer);
  conn->timer = NULL;
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  cliHandleFastFail(conn, UV_ECANCELED);
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}
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void cliReadTimeoutCb(uv_timer_t* handle) {
  // set up timeout cb
  SCliConn* conn = handle->data;
  tTrace("%s conn %p timeout, ref:%d", CONN_GET_INST_LABEL(conn), conn, T_REF_VAL_GET(conn));
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  uv_read_stop(conn->stream);
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  cliHandleExceptImpl(conn, TSDB_CODE_RPC_TIMEOUT);
}
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void* createConnPool(int size) {
555 556
  // thread local, no lock
  return taosHashInit(size, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_NO_LOCK);
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}
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void* destroyConnPool(SCliThrd* pThrd) {
  void*      pool = pThrd->pool;
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  SConnList* connList = taosHashIterate((SHashObj*)pool, NULL);
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  while (connList != NULL) {
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    while (!QUEUE_IS_EMPTY(&connList->conns)) {
      queue*    h = QUEUE_HEAD(&connList->conns);
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      SCliConn* c = QUEUE_DATA(h, SCliConn, q);
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      cliDestroyConn(c, true);
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    }
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    SMsgList* msglist = connList->list;
    while (!QUEUE_IS_EMPTY(&msglist->msgQ)) {
      queue* h = QUEUE_HEAD(&msglist->msgQ);
      QUEUE_REMOVE(h);

      SCliMsg* pMsg = QUEUE_DATA(h, SCliMsg, q);

      transDQCancel(pThrd->waitConnQueue, pMsg->ctx->task);
      pMsg->ctx->task = NULL;

      doNotifyApp(pMsg, pThrd);
    }
    taosMemoryFree(msglist);

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    connList = taosHashIterate((SHashObj*)pool, connList);
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  }
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  taosHashCleanup(pool);
585
  return NULL;
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}

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static SCliConn* getConnFromPool(SCliThrd* pThrd, char* key, bool* exceed) {
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  void*      pool = pThrd->pool;
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  SConnList* plist = taosHashGet((SHashObj*)pool, key, strlen(key));
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  STrans*    pTranInst = pThrd->pTransInst;
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  if (plist == NULL) {
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    SConnList list = {0};
    taosHashPut((SHashObj*)pool, key, strlen(key), (void*)&list, sizeof(list));
    plist = taosHashGet(pool, key, strlen(key));

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    SMsgList* nList = taosMemoryCalloc(1, sizeof(SMsgList));
    QUEUE_INIT(&nList->msgQ);
    nList->numOfConn++;

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    QUEUE_INIT(&plist->conns);
    plist->list = nList;
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  }

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  if (QUEUE_IS_EMPTY(&plist->conns)) {
    if (plist->list->numOfConn >= pTranInst->connLimitNum) {
      *exceed = true;
    }
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    return NULL;
  }

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  queue* h = QUEUE_TAIL(&plist->conns);
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  QUEUE_REMOVE(h);
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  plist->size -= 1;
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  SCliConn* conn = QUEUE_DATA(h, SCliConn, q);
  conn->status = ConnNormal;
  QUEUE_INIT(&conn->q);

  if (conn->task != NULL) {
    transDQCancel(((SCliThrd*)conn->hostThrd)->timeoutQueue, conn->task);
    conn->task = NULL;
  }
  return conn;
}

static SCliConn* getConnFromPool2(SCliThrd* pThrd, char* key, SCliMsg** pMsg) {
  void*      pool = pThrd->pool;
  STrans*    pTransInst = pThrd->pTransInst;
  SConnList* plist = taosHashGet((SHashObj*)pool, key, strlen(key));
  if (plist == NULL) {
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    SConnList list = {0};
    taosHashPut((SHashObj*)pool, key, strlen(key), (void*)&list, sizeof(list));
    plist = taosHashGet(pool, key, strlen(key));

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    SMsgList* nList = taosMemoryCalloc(1, sizeof(SMsgList));
    QUEUE_INIT(&nList->msgQ);
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    nList->numOfConn++;

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    QUEUE_INIT(&plist->conns);
    plist->list = nList;
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  }

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  STraceId* trace = &(*pMsg)->msg.info.traceId;
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  // no avaliable conn in pool
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  if (QUEUE_IS_EMPTY(&plist->conns)) {
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    SMsgList* list = plist->list;
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    if ((list)->numOfConn >= pTransInst->connLimitNum) {
      STraceId* trace = &(*pMsg)->msg.info.traceId;
      STaskArg* arg = taosMemoryMalloc(sizeof(STaskArg));
      arg->param1 = *pMsg;
      arg->param2 = pThrd;
      (*pMsg)->ctx->task = transDQSched(pThrd->waitConnQueue, doFreeTimeoutMsg, arg, pTransInst->timeToGetConn);

      tGTrace("%s msg %s delay to send, wait for avaiable connect", pTransInst->label, TMSG_INFO((*pMsg)->msg.msgType));

      QUEUE_PUSH(&(list)->msgQ, &(*pMsg)->q);
      *pMsg = NULL;
    } else {
      // send msg in delay queue
      if (!(QUEUE_IS_EMPTY(&(list)->msgQ))) {
        STaskArg* arg = taosMemoryMalloc(sizeof(STaskArg));
        arg->param1 = *pMsg;
        arg->param2 = pThrd;
        (*pMsg)->ctx->task = transDQSched(pThrd->waitConnQueue, doFreeTimeoutMsg, arg, pTransInst->timeToGetConn);
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        tGTrace("%s msg %s delay to send, wait for avaiable connect", pTransInst->label,
                TMSG_INFO((*pMsg)->msg.msgType));
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        QUEUE_PUSH(&(list)->msgQ, &(*pMsg)->q);
        queue* h = QUEUE_HEAD(&(list)->msgQ);
        QUEUE_REMOVE(h);
        SCliMsg* ans = QUEUE_DATA(h, SCliMsg, q);

        *pMsg = ans;
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        trace = &(*pMsg)->msg.info.traceId;
        tGTrace("%s msg %s pop from delay queue, start to send", pTransInst->label, TMSG_INFO((*pMsg)->msg.msgType));
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        transDQCancel(pThrd->waitConnQueue, ans->ctx->task);
      }
      list->numOfConn++;
    }
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    tTrace("%s numOfConn: %d, limit: %d", pTransInst->label, list->numOfConn, pTransInst->connLimitNum);
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    return NULL;
  }
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  queue* h = QUEUE_TAIL(&plist->conns);
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  plist->size -= 1;
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  QUEUE_REMOVE(h);

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  SCliConn* conn = QUEUE_DATA(h, SCliConn, q);
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  conn->status = ConnNormal;
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  QUEUE_INIT(&conn->q);
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  if (conn->task != NULL) {
    transDQCancel(((SCliThrd*)conn->hostThrd)->timeoutQueue, conn->task);
    conn->task = NULL;
  }
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  return conn;
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}
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static void addConnToPool(void* pool, SCliConn* conn) {
  if (conn->status == ConnInPool) {
    return;
  }
  allocConnRef(conn, true);

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  SCliThrd* thrd = conn->hostThrd;
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  if (conn->timer != NULL) {
    uv_timer_stop(conn->timer);
    taosArrayPush(thrd->timerList, &conn->timer);
    conn->timer->data = NULL;
    conn->timer = NULL;
  }
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  if (T_REF_VAL_GET(conn) > 1) {
    transUnrefCliHandle(conn);
  }

  cliDestroyConnMsgs(conn, false);
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  if (conn->list == NULL) {
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    conn->list = taosHashGet((SHashObj*)pool, conn->ip, strlen(conn->ip));
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  }
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  SConnList* pList = conn->list;
  SMsgList*  msgList = pList->list;
  if (!QUEUE_IS_EMPTY(&msgList->msgQ)) {
    queue* h = QUEUE_HEAD(&(msgList)->msgQ);
    QUEUE_REMOVE(h);

    SCliMsg* pMsg = QUEUE_DATA(h, SCliMsg, q);

    transDQCancel(thrd->waitConnQueue, pMsg->ctx->task);
    pMsg->ctx->task = NULL;

    transCtxMerge(&conn->ctx, &pMsg->ctx->appCtx);
    transQueuePush(&conn->cliMsgs, pMsg);

    conn->status = ConnNormal;
    cliSend(conn);
    return;
  }

  conn->status = ConnInPool;
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  QUEUE_PUSH(&conn->list->conns, &conn->q);
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  conn->list->size += 1;
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  if (conn->list->size >= 20) {
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    STaskArg* arg = taosMemoryCalloc(1, sizeof(STaskArg));
    arg->param1 = conn;
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    arg->param2 = thrd;
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    STrans* pTransInst = thrd->pTransInst;
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    conn->task = transDQSched(thrd->timeoutQueue, doCloseIdleConn, arg, CONN_PERSIST_TIME(pTransInst->idleTime));
  }
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}
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static int32_t allocConnRef(SCliConn* conn, bool update) {
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  if (update) {
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    transReleaseExHandle(transGetRefMgt(), conn->refId);
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    transRemoveExHandle(transGetRefMgt(), conn->refId);
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    conn->refId = -1;
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  }
  SExHandle* exh = taosMemoryCalloc(1, sizeof(SExHandle));
  exh->handle = conn;
  exh->pThrd = conn->hostThrd;
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  exh->refId = transAddExHandle(transGetRefMgt(), exh);
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  conn->refId = exh->refId;
766 767 768 769

  if (conn->refId == -1) {
    taosMemoryFree(exh);
  }
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  return 0;
}

static int32_t specifyConnRef(SCliConn* conn, bool update, int64_t handle) {
  if (update) {
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    transReleaseExHandle(transGetRefMgt(), conn->refId);
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    transRemoveExHandle(transGetRefMgt(), conn->refId);
    conn->refId = -1;
  }
  SExHandle* exh = transAcquireExHandle(transGetRefMgt(), handle);
  if (exh == NULL) {
    return -1;
  }
  exh->handle = conn;
  exh->pThrd = conn->hostThrd;
  conn->refId = exh->refId;

  transReleaseExHandle(transGetRefMgt(), handle);
  return 0;
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}
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static void cliAllocRecvBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
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  SCliConn*    conn = handle->data;
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  SConnBuffer* pBuf = &conn->readBuf;
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  transAllocBuffer(pBuf, buf);
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}
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static void cliRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
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  // impl later
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  if (handle->data == NULL) {
    return;
  }
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  SCliConn*    conn = handle->data;
  SConnBuffer* pBuf = &conn->readBuf;
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  if (nread > 0) {
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    pBuf->len += nread;
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    while (transReadComplete(pBuf)) {
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      tTrace("%s conn %p read complete", CONN_GET_INST_LABEL(conn), conn);
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      if (pBuf->invalid) {
        cliHandleExcept(conn);
        break;
      } else {
        cliHandleResp(conn);
      }
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    }
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    return;
  }
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817
  if (nread == 0) {
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    // ref http://docs.libuv.org/en/v1.x/stream.html?highlight=uv_read_start#c.uv_read_cb
    // nread might be 0, which does not indicate an error or EOF. This is equivalent to EAGAIN or EWOULDBLOCK under
    // read(2).
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    tTrace("%s conn %p read empty", CONN_GET_INST_LABEL(conn), conn);
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    return;
  }
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  if (nread < 0) {
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    tWarn("%s conn %p read error:%s, ref:%d", CONN_GET_INST_LABEL(conn), conn, uv_err_name(nread), T_REF_VAL_GET(conn));
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    conn->broken = true;
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    cliHandleExcept(conn);
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  }
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}
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static SCliConn* cliCreateConn(SCliThrd* pThrd) {
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  SCliConn* conn = taosMemoryCalloc(1, sizeof(SCliConn));
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  // read/write stream handle
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  conn->stream = (uv_stream_t*)taosMemoryMalloc(sizeof(uv_tcp_t));
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  uv_tcp_init(pThrd->loop, (uv_tcp_t*)(conn->stream));
  conn->stream->data = conn;

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  uv_timer_t* timer = taosArrayGetSize(pThrd->timerList) > 0 ? *(uv_timer_t**)taosArrayPop(pThrd->timerList) : NULL;
  if (timer == NULL) {
    timer = taosMemoryCalloc(1, sizeof(uv_timer_t));
    tDebug("no available timer, create a timer %p", timer);
    uv_timer_init(pThrd->loop, timer);
  }
  timer->data = conn;
  conn->timer = timer;
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  conn->connReq.data = conn;
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  transReqQueueInit(&conn->wreqQueue);

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  transQueueInit(&conn->cliMsgs, NULL);
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opt rpc  
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  transInitBuffer(&conn->readBuf);
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  QUEUE_INIT(&conn->q);
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  conn->hostThrd = pThrd;
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  conn->status = ConnNormal;
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  conn->broken = false;
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  transRefCliHandle(conn);
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  atomic_add_fetch_32(&pThrd->connCount, 1);
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  allocConnRef(conn, false);
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  return conn;
}
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static void cliDestroyConn(SCliConn* conn, bool clear) {
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  SCliThrd* pThrd = conn->hostThrd;
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  tTrace("%s conn %p remove from conn pool", CONN_GET_INST_LABEL(conn), conn);
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  conn->broken = true;
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  QUEUE_REMOVE(&conn->q);
  QUEUE_INIT(&conn->q);
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  conn->broken = true;

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  if (conn->list != NULL) {
    SConnList* connList = conn->list;
    connList->list->numOfConn--;
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    connList->size--;
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  } else {
    SConnList* connList = taosHashGet((SHashObj*)pThrd->pool, conn->ip, strlen(conn->ip));
    connList->list->numOfConn--;
  }
  conn->list = NULL;
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  pThrd->newConnCount--;
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  transReleaseExHandle(transGetRefMgt(), conn->refId);
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  transRemoveExHandle(transGetRefMgt(), conn->refId);
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opt rpc  
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  conn->refId = -1;
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  if (conn->task != NULL) {
    transDQCancel(pThrd->timeoutQueue, conn->task);
    conn->task = NULL;
  }
  if (conn->timer != NULL) {
    uv_timer_stop(conn->timer);
    conn->timer->data = NULL;
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    taosArrayPush(pThrd->timerList, &conn->timer);
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    conn->timer = NULL;
  }
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  if (clear) {
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    if (!uv_is_closing((uv_handle_t*)conn->stream)) {
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      uv_read_stop(conn->stream);
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      uv_close((uv_handle_t*)conn->stream, cliDestroy);
    }
904
  }
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}
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static void cliDestroy(uv_handle_t* handle) {
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  if (uv_handle_get_type(handle) != UV_TCP || handle->data == NULL) {
    return;
  }
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  SCliConn* conn = handle->data;
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  SCliThrd* pThrd = conn->hostThrd;
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  if (conn->timer != NULL) {
    uv_timer_stop(conn->timer);
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    taosArrayPush(pThrd->timerList, &conn->timer);
    conn->timer->data = NULL;
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    conn->timer = NULL;
  }
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  atomic_sub_fetch_32(&pThrd->connCount, 1);

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  transReleaseExHandle(transGetRefMgt(), conn->refId);
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  transRemoveExHandle(transGetRefMgt(), conn->refId);
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  taosMemoryFree(conn->ip);
  taosMemoryFree(conn->stream);
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  cliDestroyConnMsgs(conn, true);

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  tTrace("%s conn %p destroy successfully", CONN_GET_INST_LABEL(conn), conn);
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  transReqQueueClear(&conn->wreqQueue);
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  transDestroyBuffer(&conn->readBuf);
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  taosMemoryFree(conn);
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}
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static bool cliHandleNoResp(SCliConn* conn) {
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  bool res = false;
  if (!transQueueEmpty(&conn->cliMsgs)) {
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    SCliMsg* pMsg = transQueueGet(&conn->cliMsgs, 0);
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    if (REQUEST_NO_RESP(&pMsg->msg)) {
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      transQueuePop(&conn->cliMsgs);
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      destroyCmsg(pMsg);
      res = true;
    }
    if (res == true) {
      if (cliMaySendCachedMsg(conn) == false) {
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        SCliThrd* thrd = conn->hostThrd;
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        addConnToPool(thrd->pool, conn);
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        res = false;
      } else {
        res = true;
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      }
    }
  }
  return res;
}
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static void cliSendCb(uv_write_t* req, int status) {
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  SCliConn* pConn = transReqQueueRemove(req);
  if (pConn == NULL) return;
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  SCliMsg* pMsg = !transQueueEmpty(&pConn->cliMsgs) ? transQueueGet(&pConn->cliMsgs, 0) : NULL;
  if (pMsg != NULL) {
    int64_t cost = taosGetTimestampUs() - pMsg->st;
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    if (cost > 1000 * 20) {
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      tWarn("%s conn %p send cost:%dus, send exception", CONN_GET_INST_LABEL(pConn), pConn, (int)cost);
    }
  }

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  if (status == 0) {
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    tTrace("%s conn %p data already was written out", CONN_GET_INST_LABEL(pConn), pConn);
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  } else {
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    if (!uv_is_closing((uv_handle_t*)&pConn->stream)) {
      tError("%s conn %p failed to write:%s", CONN_GET_INST_LABEL(pConn), pConn, uv_err_name(status));
      cliHandleExcept(pConn);
    }
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    return;
  }
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  if (cliHandleNoResp(pConn) == true) {
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    tTrace("%s conn %p no resp required", CONN_GET_INST_LABEL(pConn), pConn);
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    return;
  }
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  uv_read_start((uv_stream_t*)pConn->stream, cliAllocRecvBufferCb, cliRecvCb);
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}
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void cliSendBatch(SCliConn* pConn) {
  SCliThrd* pThrd = pConn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;

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  SCliBatch*     pBatch = pConn->pBatch;
  SCliBatchList* pList = pBatch->pList;
  pList->connCnt += 1;

  int32_t wLen = pBatch->wLen;
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  uv_buf_t* wb = taosMemoryCalloc(wLen, sizeof(uv_buf_t));
  int       i = 0;

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  queue* h = NULL;
  QUEUE_FOREACH(h, &pBatch->wq) {
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    SCliMsg* pCliMsg = QUEUE_DATA(h, SCliMsg, q);

    STransConnCtx* pCtx = pCliMsg->ctx;

    STransMsg* pMsg = (STransMsg*)(&pCliMsg->msg);
    if (pMsg->pCont == 0) {
      pMsg->pCont = (void*)rpcMallocCont(0);
      pMsg->contLen = 0;
    }
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    int            msgLen = transMsgLenFromCont(pMsg->contLen);
    STransMsgHead* pHead = transHeadFromCont(pMsg->pCont);

    if (pHead->comp == 0) {
      pHead->ahandle = pCtx != NULL ? (uint64_t)pCtx->ahandle : 0;
      pHead->noResp = REQUEST_NO_RESP(pMsg) ? 1 : 0;
      pHead->persist = REQUEST_PERSIS_HANDLE(pMsg) ? 1 : 0;
      pHead->msgType = pMsg->msgType;
      pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
      pHead->release = REQUEST_RELEASE_HANDLE(pCliMsg) ? 1 : 0;
      memcpy(pHead->user, pTransInst->user, strlen(pTransInst->user));
      pHead->traceId = pMsg->info.traceId;
      pHead->magicNum = htonl(TRANS_MAGIC_NUM);
    }
    pHead->timestamp = taosHton64(taosGetTimestampUs());

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    if (pHead->comp == 0) {
      if (pTransInst->compressSize != -1 && pTransInst->compressSize < pMsg->contLen) {
        msgLen = transCompressMsg(pMsg->pCont, pMsg->contLen) + sizeof(STransMsgHead);
        pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
      }
    } else {
      msgLen = (int32_t)ntohl((uint32_t)(pHead->msgLen));
    }
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    wb[i++] = uv_buf_init((char*)pHead, msgLen);
  }

  uv_write_t* req = taosMemoryCalloc(1, sizeof(uv_write_t));
  req->data = pConn;
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  tDebug("%s conn %p start to send batch msg, batch size:%d, msgLen:%d", CONN_GET_INST_LABEL(pConn), pConn,
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         pBatch->wLen, pBatch->batchSize);
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  uv_write(req, (uv_stream_t*)pConn->stream, wb, wLen, cliSendBatchCb);
  taosMemoryFree(wb);
}
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void cliSend(SCliConn* pConn) {
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  SCliThrd* pThrd = pConn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;

  if (transQueueEmpty(&pConn->cliMsgs)) {
    tError("%s conn %p not msg to send", pTransInst->label, pConn);
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    cliHandleExcept(pConn);
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    return;
  }
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  SCliMsg* pCliMsg = NULL;
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  CONN_GET_NEXT_SENDMSG(pConn);
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  pCliMsg->sent = 1;

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  STransConnCtx* pCtx = pCliMsg->ctx;
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  STransMsg* pMsg = (STransMsg*)(&pCliMsg->msg);
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  if (pMsg->pCont == 0) {
    pMsg->pCont = (void*)rpcMallocCont(0);
    pMsg->contLen = 0;
  }
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  int            msgLen = transMsgLenFromCont(pMsg->contLen);
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  STransMsgHead* pHead = transHeadFromCont(pMsg->pCont);
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  if (pHead->comp == 0) {
    pHead->ahandle = pCtx != NULL ? (uint64_t)pCtx->ahandle : 0;
    pHead->noResp = REQUEST_NO_RESP(pMsg) ? 1 : 0;
    pHead->persist = REQUEST_PERSIS_HANDLE(pMsg) ? 1 : 0;
    pHead->msgType = pMsg->msgType;
    pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
    pHead->release = REQUEST_RELEASE_HANDLE(pCliMsg) ? 1 : 0;
    memcpy(pHead->user, pTransInst->user, strlen(pTransInst->user));
    pHead->traceId = pMsg->info.traceId;
    pHead->magicNum = htonl(TRANS_MAGIC_NUM);
  }
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  pHead->timestamp = taosHton64(taosGetTimestampUs());
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  if (pHead->persist == 1) {
    CONN_SET_PERSIST_BY_APP(pConn);
  }
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  STraceId* trace = &pMsg->info.traceId;
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  if (pTransInst->startTimer != NULL && pTransInst->startTimer(0, pMsg->msgType)) {
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    uv_timer_t* timer = taosArrayGetSize(pThrd->timerList) > 0 ? *(uv_timer_t**)taosArrayPop(pThrd->timerList) : NULL;
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    if (timer == NULL) {
      timer = taosMemoryCalloc(1, sizeof(uv_timer_t));
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      tDebug("no available timer, create a timer %p", timer);
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      uv_timer_init(pThrd->loop, timer);
    }
    timer->data = pConn;
    pConn->timer = timer;

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    tGTrace("%s conn %p start timer for msg:%s", CONN_GET_INST_LABEL(pConn), pConn, TMSG_INFO(pMsg->msgType));
    uv_timer_start((uv_timer_t*)pConn->timer, cliReadTimeoutCb, TRANS_READ_TIMEOUT, 0);
  }
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  if (pHead->comp == 0) {
    if (pTransInst->compressSize != -1 && pTransInst->compressSize < pMsg->contLen) {
      msgLen = transCompressMsg(pMsg->pCont, pMsg->contLen) + sizeof(STransMsgHead);
      pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
    }
  } else {
    msgLen = (int32_t)ntohl((uint32_t)(pHead->msgLen));
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  }
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  tGDebug("%s conn %p %s is sent to %s, local info %s, len:%d", CONN_GET_INST_LABEL(pConn), pConn,
          TMSG_INFO(pHead->msgType), pConn->dst, pConn->src, msgLen);
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  uv_buf_t    wb = uv_buf_init((char*)pHead, msgLen);
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  uv_write_t* req = transReqQueuePush(&pConn->wreqQueue);
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  int status = uv_write(req, (uv_stream_t*)pConn->stream, &wb, 1, cliSendCb);
  if (status != 0) {
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    tGError("%s conn %p failed to send msg:%s, errmsg:%s", CONN_GET_INST_LABEL(pConn), pConn, TMSG_INFO(pMsg->msgType),
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            uv_err_name(status));
    cliHandleExcept(pConn);
  }
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  return;
_RETURN:
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  return;
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}
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static void cliDestroyBatch(SCliBatch* pBatch) {
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  if (pBatch == NULL) return;
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  while (!QUEUE_IS_EMPTY(&pBatch->wq)) {
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    queue* h = QUEUE_HEAD(&pBatch->wq);
    QUEUE_REMOVE(h);
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    SCliMsg* p = QUEUE_DATA(h, SCliMsg, q);
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    destroyCmsg(p);
  }
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  SCliBatchList* p = pBatch->pList;
  p->sending -= 1;
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  taosMemoryFree(pBatch);
}
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static void cliHandleBatchReq(SCliBatch* pBatch, SCliThrd* pThrd) {
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  if (pThrd->quit == true) {
    cliDestroyBatch(pBatch);
    return;
  }

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  if (pBatch == NULL || pBatch->wLen == 0 || QUEUE_IS_EMPTY(&pBatch->wq)) {
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    return;
  }
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  STrans*        pTransInst = pThrd->pTransInst;
  SCliBatchList* pList = pBatch->pList;
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  char key[TSDB_FQDN_LEN + 64] = {0};
  CONN_CONSTRUCT_HASH_KEY(key, pList->ip, pList->port);

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  bool      exceed = false;
  SCliConn* conn = getConnFromPool(pThrd, key, &exceed);
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  if (conn == NULL && exceed) {
    tError("%s failed to send batch msg, batch size:%d, msgLen: %d, conn limit:%d", pTransInst->label, pBatch->wLen,
           pBatch->batchSize, pTransInst->connLimitNum);
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    cliDestroyBatch(pBatch);
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    return;
  }
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  if (conn == NULL) {
    conn = cliCreateConn(pThrd);
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    conn->pBatch = pBatch;
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    conn->ip = taosStrdup(pList->dst);
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    uint32_t ipaddr = cliGetIpFromFqdnCache(pThrd->fqdn2ipCache, pList->ip);
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    if (ipaddr == 0xffffffff) {
      uv_timer_stop(conn->timer);
      conn->timer->data = NULL;
      taosArrayPush(pThrd->timerList, &conn->timer);
      conn->timer = NULL;

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      cliHandleFastFail(conn, -1);
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      return;
    }
    struct sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = ipaddr;
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    addr.sin_port = (uint16_t)htons(pList->port);
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    tTrace("%s conn %p try to connect to %s", pTransInst->label, conn, pList->dst);
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    pThrd->newConnCount++;
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    int32_t fd = taosCreateSocketWithTimeout(TRANS_CONN_TIMEOUT * 10);
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    if (fd == -1) {
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      tError("%s conn %p failed to create socket, reason:%s", transLabel(pTransInst), conn,
             tstrerror(TAOS_SYSTEM_ERROR(errno)));
      cliHandleFastFail(conn, -1);
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      return;
    }
    int ret = uv_tcp_open((uv_tcp_t*)conn->stream, fd);
    if (ret != 0) {
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      tError("%s conn %p failed to set stream, reason:%s", transLabel(pTransInst), conn, uv_err_name(ret));
      cliHandleFastFail(conn, -1);
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      return;
    }
    ret = transSetConnOption((uv_tcp_t*)conn->stream);
    if (ret != 0) {
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      tError("%s conn %p failed to set socket opt, reason:%s", transLabel(pTransInst), conn, uv_err_name(ret));
      cliHandleFastFail(conn, -1);
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      return;
    }

    ret = uv_tcp_connect(&conn->connReq, (uv_tcp_t*)(conn->stream), (const struct sockaddr*)&addr, cliConnCb);
    if (ret != 0) {
      uv_timer_stop(conn->timer);
      conn->timer->data = NULL;
      taosArrayPush(pThrd->timerList, &conn->timer);
      conn->timer = NULL;
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      cliHandleFastFail(conn, -1);
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      return;
    }
    uv_timer_start(conn->timer, cliConnTimeout, TRANS_CONN_TIMEOUT, 0);
    return;
  }

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  conn->pBatch = pBatch;
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  cliSendBatch(conn);
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}
static void cliSendBatchCb(uv_write_t* req, int status) {
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  SCliConn*  conn = req->data;
  SCliThrd*  thrd = conn->hostThrd;
  SCliBatch* p = conn->pBatch;
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  SCliBatchList* pBatchList = p->pList;
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  SCliBatch*     nxtBatch = cliGetHeadFromList(pBatchList);
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  pBatchList->connCnt -= 1;

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  conn->pBatch = NULL;

  if (status != 0) {
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    tDebug("%s conn %p failed to send batch msg, batch size:%d, msgLen:%d, reason:%s", CONN_GET_INST_LABEL(conn), conn,
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           p->wLen, p->batchSize, uv_err_name(status));
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    if (!uv_is_closing((uv_handle_t*)&conn->stream)) cliHandleExcept(conn);

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    cliHandleBatchReq(nxtBatch, thrd);
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  } else {
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    tDebug("%s conn %p succ to send batch msg, batch size:%d, msgLen:%d", CONN_GET_INST_LABEL(conn), conn, p->wLen,
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           p->batchSize);
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    if (!uv_is_closing((uv_handle_t*)&conn->stream) && conn->broken == false) {
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      if (nxtBatch != NULL) {
        conn->pBatch = nxtBatch;
        cliSendBatch(conn);
      } else {
        addConnToPool(thrd->pool, conn);
      }
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    } else {
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      cliDestroyBatch(nxtBatch);
      // conn release by other callback
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    }
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  }
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  cliDestroyBatch(p);
  taosMemoryFree(req);
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}
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static void cliHandleFastFail(SCliConn* pConn, int status) {
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  SCliThrd* pThrd = pConn->hostThrd;
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  STrans*   pTransInst = pThrd->pTransInst;
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  if (status == -1) status = ENETUNREACH;

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  if (pConn->pBatch == NULL) {
    SCliMsg* pMsg = transQueueGet(&pConn->cliMsgs, 0);

    STraceId* trace = &pMsg->msg.info.traceId;
    tGError("%s msg %s failed to send, conn %p failed to connect to %s, reason: %s", CONN_GET_INST_LABEL(pConn),
            TMSG_INFO(pMsg->msg.msgType), pConn, pConn->ip, uv_strerror(status));

    if (pMsg != NULL && REQUEST_NO_RESP(&pMsg->msg) &&
        (pTransInst->failFastFp != NULL && pTransInst->failFastFp(pMsg->msg.msgType))) {
      SFailFastItem* item = taosHashGet(pThrd->failFastCache, pConn->ip, strlen(pConn->ip));
      int64_t        cTimestamp = taosGetTimestampMs();
      if (item != NULL) {
        int32_t elapse = cTimestamp - item->timestamp;
        if (elapse >= 0 && elapse <= pTransInst->failFastInterval) {
          item->count++;
        } else {
          item->count = 1;
          item->timestamp = cTimestamp;
        }
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      } else {
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        SFailFastItem item = {.count = 1, .timestamp = cTimestamp};
        taosHashPut(pThrd->failFastCache, pConn->ip, strlen(pConn->ip), &item, sizeof(SFailFastItem));
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      }
    }
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  } else {
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    tError("%s batch msg failed to send, conn %p failed to connect to %s, reason: %s", CONN_GET_INST_LABEL(pConn),
           pConn, pConn->ip, uv_strerror(status));
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    cliDestroyBatch(pConn->pBatch);
    pConn->pBatch = NULL;
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  }
  cliHandleExcept(pConn);
}
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void cliConnCb(uv_connect_t* req, int status) {
  SCliConn* pConn = req->data;
  SCliThrd* pThrd = pConn->hostThrd;
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  bool      timeout = false;

  if (pConn->timer == NULL) {
    timeout = true;
  } else {
    uv_timer_stop(pConn->timer);
    pConn->timer->data = NULL;
    taosArrayPush(pThrd->timerList, &pConn->timer);
    pConn->timer = NULL;
  }
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  if (status != 0) {
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    if (timeout == false) {
      cliHandleFastFail(pConn, status);
    } else if (timeout == true) {
      // already deal by timeout
    }
1316
    return;
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  }
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  struct sockaddr peername, sockname;
  int             addrlen = sizeof(peername);
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  uv_tcp_getpeername((uv_tcp_t*)pConn->stream, &peername, &addrlen);
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  transSockInfo2Str(&peername, pConn->dst);
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  addrlen = sizeof(sockname);
  uv_tcp_getsockname((uv_tcp_t*)pConn->stream, &sockname, &addrlen);
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  transSockInfo2Str(&sockname, pConn->src);
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  tTrace("%s conn %p connect to server successfully", CONN_GET_INST_LABEL(pConn), pConn);
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  if (pConn->pBatch != NULL) {
    cliSendBatch(pConn);
  } else {
    cliSend(pConn);
  }
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}

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static void doNotifyApp(SCliMsg* pMsg, SCliThrd* pThrd) {
  STransConnCtx* pCtx = pMsg->ctx;
  STrans*        pTransInst = pThrd->pTransInst;

  STransMsg transMsg = {0};
  transMsg.contLen = 0;
  transMsg.pCont = NULL;
  transMsg.code = TSDB_CODE_RPC_MAX_SESSIONS;
  transMsg.msgType = pMsg->msg.msgType + 1;
  transMsg.info.ahandle = pMsg->ctx->ahandle;
  transMsg.info.traceId = pMsg->msg.info.traceId;
  transMsg.info.hasEpSet = false;
  if (pCtx->pSem != NULL) {
    if (pCtx->pRsp == NULL) {
    } else {
      memcpy((char*)pCtx->pRsp, (char*)&transMsg, sizeof(transMsg));
    }
  } else {
    pTransInst->cfp(pTransInst->parent, &transMsg, NULL);
  }

  destroyCmsg(pMsg);
}
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static void cliHandleQuit(SCliMsg* pMsg, SCliThrd* pThrd) {
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  if (!transAsyncPoolIsEmpty(pThrd->asyncPool)) {
    pThrd->stopMsg = pMsg;
    return;
  }
  pThrd->stopMsg = NULL;
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  pThrd->quit = true;
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  tDebug("cli work thread %p start to quit", pThrd);
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  destroyCmsg(pMsg);
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  destroyConnPool(pThrd);
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  uv_walk(pThrd->loop, cliWalkCb, NULL);
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}
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static void cliHandleRelease(SCliMsg* pMsg, SCliThrd* pThrd) {
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  int64_t    refId = (int64_t)(pMsg->msg.info.handle);
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  SExHandle* exh = transAcquireExHandle(transGetRefMgt(), refId);
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  if (exh == NULL) {
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    tDebug("%" PRId64 " already released", refId);
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    destroyCmsg(pMsg);
    return;
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  }

  SCliConn* conn = exh->handle;
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  transReleaseExHandle(transGetRefMgt(), refId);
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  tDebug("%s conn %p start to release to inst", CONN_GET_INST_LABEL(conn), conn);
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  if (T_REF_VAL_GET(conn) == 2) {
    transUnrefCliHandle(conn);
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    if (!transQueuePush(&conn->cliMsgs, pMsg)) {
      return;
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    }
    cliSend(conn);
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  } else {
    tError("%s conn %p already released", CONN_GET_INST_LABEL(conn), conn);
    destroyCmsg(pMsg);
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  }
}
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static void cliHandleUpdate(SCliMsg* pMsg, SCliThrd* pThrd) {
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  STransConnCtx* pCtx = pMsg->ctx;
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  pThrd->cvtAddr = pCtx->cvtAddr;
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  destroyCmsg(pMsg);
}
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SCliConn* cliGetConn(SCliMsg** pMsg, SCliThrd* pThrd, bool* ignore, char* addr) {
  STransConnCtx* pCtx = (*pMsg)->ctx;
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  SCliConn*      conn = NULL;

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  int64_t refId = (int64_t)((*pMsg)->msg.info.handle);
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  if (refId != 0) {
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    SExHandle* exh = transAcquireExHandle(transGetRefMgt(), refId);
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    if (exh == NULL) {
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      tError("failed to get conn, refId: %" PRId64 "", refId);
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      *ignore = true;
      return NULL;
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    } else {
      conn = exh->handle;
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      if (conn == NULL) {
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        conn = getConnFromPool2(pThrd, addr, pMsg);
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        if (conn != NULL) specifyConnRef(conn, true, refId);
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      }
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      transReleaseExHandle(transGetRefMgt(), refId);
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    }
    return conn;
  };
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  conn = getConnFromPool2(pThrd, addr, pMsg);
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  if (conn != NULL) {
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    tTrace("%s conn %p get from conn pool:%p", CONN_GET_INST_LABEL(conn), conn, pThrd->pool);
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  } else {
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    tTrace("%s not found conn in conn pool:%p", ((STrans*)pThrd->pTransInst)->label, pThrd->pool);
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  }
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  return conn;
}
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FORCE_INLINE void cliMayCvtFqdnToIp(SEpSet* pEpSet, SCvtAddr* pCvtAddr) {
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  if (pCvtAddr->cvt == false) {
    return;
  }
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  if (pEpSet->numOfEps == 1 && strncmp(pEpSet->eps[0].fqdn, pCvtAddr->fqdn, TSDB_FQDN_LEN) == 0) {
    memset(pEpSet->eps[0].fqdn, 0, TSDB_FQDN_LEN);
    memcpy(pEpSet->eps[0].fqdn, pCvtAddr->ip, TSDB_FQDN_LEN);
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  }
}
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FORCE_INLINE bool cliIsEpsetUpdated(int32_t code, STransConnCtx* pCtx) {
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  if (code != 0) return false;
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  // if (pCtx->retryCnt == 0) return false;
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  if (transEpSetIsEqual(&pCtx->epSet, &pCtx->origEpSet)) return false;
  return true;
}
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FORCE_INLINE int32_t cliBuildExceptResp(SCliMsg* pMsg, STransMsg* pResp) {
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  if (pMsg == NULL) return -1;

  memset(pResp, 0, sizeof(STransMsg));

  pResp->code = TSDB_CODE_RPC_BROKEN_LINK;
  pResp->msgType = pMsg->msg.msgType + 1;
  pResp->info.ahandle = pMsg->ctx ? pMsg->ctx->ahandle : NULL;
  pResp->info.traceId = pMsg->msg.info.traceId;

  return 0;
}
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static FORCE_INLINE uint32_t cliGetIpFromFqdnCache(SHashObj* cache, char* fqdn) {
  uint32_t  addr = 0;
  uint32_t* v = taosHashGet(cache, fqdn, strlen(fqdn));
  if (v == NULL) {
    addr = taosGetIpv4FromFqdn(fqdn);
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    if (addr == 0xffffffff) {
      terrno = TAOS_SYSTEM_ERROR(errno);
      tError("failed to get ip from fqdn:%s since %s", fqdn, terrstr());
      return addr;
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    }

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    taosHashPut(cache, fqdn, strlen(fqdn), &addr, sizeof(addr));
  } else {
    addr = *v;
  }
  return addr;
}
static FORCE_INLINE void cliUpdateFqdnCache(SHashObj* cache, char* fqdn) {
  // impl later
  return;
}
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static void doFreeTimeoutMsg(void* param) {
  STaskArg* arg = param;
  SCliMsg*  pMsg = arg->param1;
  SCliThrd* pThrd = arg->param2;
  STrans*   pTransInst = pThrd->pTransInst;
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  QUEUE_REMOVE(&pMsg->q);
  STraceId* trace = &pMsg->msg.info.traceId;
  tGTrace("%s msg %s cannot get available conn after timeout", pTransInst->label, TMSG_INFO(pMsg->msg.msgType));
  doNotifyApp(pMsg, pThrd);
  taosMemoryFree(arg);
}
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void cliHandleReq(SCliMsg* pMsg, SCliThrd* pThrd) {
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  STrans* pTransInst = pThrd->pTransInst;
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  cliMayCvtFqdnToIp(&pMsg->ctx->epSet, &pThrd->cvtAddr);
  if (!EPSET_IS_VALID(&pMsg->ctx->epSet)) {
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    destroyCmsg(pMsg);
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    return;
  }
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  if (rpcDebugFlag & DEBUG_TRACE) {
    if (tmsgIsValid(pMsg->msg.msgType)) {
      char buf[128] = {0};
      sprintf(buf, "%s", TMSG_INFO(pMsg->msg.msgType));
      int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
      if (NULL == 0) {
        int localCount = 1;
        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
      } else {
        int localCount = *count + 1;
        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
      }
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    }
  }
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  char*    fqdn = EPSET_GET_INUSE_IP(&pMsg->ctx->epSet);
  uint16_t port = EPSET_GET_INUSE_PORT(&pMsg->ctx->epSet);
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  char     addr[TSDB_FQDN_LEN + 64] = {0};
  CONN_CONSTRUCT_HASH_KEY(addr, fqdn, port);
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  bool      ignore = false;
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  SCliConn* conn = cliGetConn(&pMsg, pThrd, &ignore, addr);
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  if (ignore == true) {
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    // persist conn already release by server
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    STransMsg resp;
    cliBuildExceptResp(pMsg, &resp);
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    if (pMsg->type != Release) {
      pTransInst->cfp(pTransInst->parent, &resp, NULL);
    }
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    destroyCmsg(pMsg);
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    return;
  }
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  if (conn == NULL && pMsg == NULL) {
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    return;
  }
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  STraceId* trace = &pMsg->msg.info.traceId;
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  if (conn != NULL) {
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    transCtxMerge(&conn->ctx, &pMsg->ctx->appCtx);
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    transQueuePush(&conn->cliMsgs, pMsg);
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    cliSend(conn);
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  } else {
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    conn = cliCreateConn(pThrd);
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    int64_t refId = (int64_t)pMsg->msg.info.handle;
    if (refId != 0) specifyConnRef(conn, true, refId);

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    transCtxMerge(&conn->ctx, &pMsg->ctx->appCtx);
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    transQueuePush(&conn->cliMsgs, pMsg);
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    conn->ip = taosStrdup(addr);
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    uint32_t ipaddr = cliGetIpFromFqdnCache(pThrd->fqdn2ipCache, fqdn);
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    if (ipaddr == 0xffffffff) {
      uv_timer_stop(conn->timer);
      conn->timer->data = NULL;
      taosArrayPush(pThrd->timerList, &conn->timer);
      conn->timer = NULL;

      cliHandleExcept(conn);
      return;
    }
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    struct sockaddr_in addr;
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    addr.sin_family = AF_INET;
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    addr.sin_addr.s_addr = ipaddr;
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    addr.sin_port = (uint16_t)htons(port);
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    tGTrace("%s conn %p try to connect to %s", pTransInst->label, conn, conn->ip);
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    pThrd->newConnCount++;
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    int32_t fd = taosCreateSocketWithTimeout(TRANS_CONN_TIMEOUT * 4);
    if (fd == -1) {
      tGError("%s conn %p failed to create socket, reason:%s", transLabel(pTransInst), conn,
              tstrerror(TAOS_SYSTEM_ERROR(errno)));
      cliHandleExcept(conn);
      errno = 0;
      return;
    }
    int ret = uv_tcp_open((uv_tcp_t*)conn->stream, fd);
    if (ret != 0) {
      tGError("%s conn %p failed to set stream, reason:%s", transLabel(pTransInst), conn, uv_err_name(ret));
      cliHandleExcept(conn);
      return;
    }
    ret = transSetConnOption((uv_tcp_t*)conn->stream);
    if (ret != 0) {
      tGError("%s conn %p failed to set socket opt, reason:%s", transLabel(pTransInst), conn, uv_err_name(ret));
      cliHandleExcept(conn);
      return;
    }
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    ret = uv_tcp_connect(&conn->connReq, (uv_tcp_t*)(conn->stream), (const struct sockaddr*)&addr, cliConnCb);
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    if (ret != 0) {
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      uv_timer_stop(conn->timer);
      conn->timer->data = NULL;
      taosArrayPush(pThrd->timerList, &conn->timer);
      conn->timer = NULL;

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      cliHandleFastFail(conn, ret);
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      return;
    }
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    uv_timer_start(conn->timer, cliConnTimeout, TRANS_CONN_TIMEOUT, 0);
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  }
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  tGTrace("%s conn %p ready", pTransInst->label, conn);
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}
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static void cliNoBatchDealReq(queue* wq, SCliThrd* pThrd) {
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  int count = 0;
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  while (!QUEUE_IS_EMPTY(wq)) {
    queue* h = QUEUE_HEAD(wq);
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    QUEUE_REMOVE(h);

    SCliMsg* pMsg = QUEUE_DATA(h, SCliMsg, q);
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    if (pMsg->type == Quit) {
      pThrd->stopMsg = pMsg;
      continue;
    }
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    (*cliAsyncHandle[pMsg->type])(pMsg, pThrd);

    count++;
  }
  if (count >= 2) {
    tTrace("cli process batch size:%d", count);
  }
}
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SCliBatch* cliGetHeadFromList(SCliBatchList* pList) {
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  if (QUEUE_IS_EMPTY(&pList->wq) || pList->connCnt > pList->connMax || pList->sending > pList->connMax) {
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    return NULL;
  }
  queue* hr = QUEUE_HEAD(&pList->wq);
  QUEUE_REMOVE(hr);
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  pList->sending += 1;
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  pList->len -= 1;

  SCliBatch* batch = QUEUE_DATA(hr, SCliBatch, listq);
  return batch;
}
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static void cliBatchDealReq(queue* wq, SCliThrd* pThrd) {
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  STrans* pInst = pThrd->pTransInst;

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  int count = 0;
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  while (!QUEUE_IS_EMPTY(wq)) {
    queue* h = QUEUE_HEAD(wq);
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    QUEUE_REMOVE(h);
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    SCliMsg* pMsg = QUEUE_DATA(h, SCliMsg, q);
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    if (pMsg->type == Quit) {
      pThrd->stopMsg = pMsg;
      continue;
    }

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    if (pMsg->type == Normal && REQUEST_NO_RESP(&pMsg->msg)) {
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      STransConnCtx* pCtx = pMsg->ctx;

      char*    ip = EPSET_GET_INUSE_IP(&pCtx->epSet);
      uint32_t port = EPSET_GET_INUSE_PORT(&pCtx->epSet);
      char     key[TSDB_FQDN_LEN + 64] = {0};
      CONN_CONSTRUCT_HASH_KEY(key, ip, port);

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      // SCliBatch** ppBatch = taosHashGet(pThrd->batchCache, key, sizeof(key));
      SCliBatchList** ppBatchList = taosHashGet(pThrd->batchCache, key, sizeof(key));
      if (ppBatchList == NULL || *ppBatchList == NULL) {
        SCliBatchList* pBatchList = taosMemoryCalloc(1, sizeof(SCliBatchList));
        QUEUE_INIT(&pBatchList->wq);
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        pBatchList->connMax = pInst->connLimitNum;
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        pBatchList->connCnt = 0;
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        pBatchList->batchLenLimit = pInst->batchSize;
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        pBatchList->len += 1;
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        pBatchList->ip = taosStrdup(ip);
        pBatchList->dst = taosStrdup(key);
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        pBatchList->port = port;

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        SCliBatch* pBatch = taosMemoryCalloc(1, sizeof(SCliBatch));
        QUEUE_INIT(&pBatch->wq);
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        QUEUE_INIT(&pBatch->listq);

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        QUEUE_PUSH(&pBatch->wq, h);
        pBatch->wLen += 1;
        pBatch->batchSize += pMsg->msg.contLen;
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        pBatch->pList = pBatchList;
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        QUEUE_PUSH(&pBatchList->wq, &pBatch->listq);
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        taosHashPut(pThrd->batchCache, key, sizeof(key), &pBatchList, sizeof(void*));
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      } else {
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        if (QUEUE_IS_EMPTY(&(*ppBatchList)->wq)) {
          SCliBatch* pBatch = taosMemoryCalloc(1, sizeof(SCliBatch));
          QUEUE_INIT(&pBatch->wq);
          QUEUE_INIT(&pBatch->listq);

          QUEUE_PUSH(&pBatch->wq, h);
          pBatch->wLen += 1;
          pBatch->batchSize = pMsg->msg.contLen;
          pBatch->pList = *ppBatchList;

          QUEUE_PUSH(&((*ppBatchList)->wq), &pBatch->listq);
          (*ppBatchList)->len += 1;

          continue;
        }

        queue*     hdr = QUEUE_TAIL(&((*ppBatchList)->wq));
        SCliBatch* pBatch = QUEUE_DATA(hdr, SCliBatch, listq);
        if ((pBatch->batchSize + pMsg->msg.contLen) < (*ppBatchList)->batchLenLimit) {
          QUEUE_PUSH(&pBatch->wq, h);
          pBatch->batchSize += pMsg->msg.contLen;
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          pBatch->wLen += 1;
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        } else {
          SCliBatch* pBatch = taosMemoryCalloc(1, sizeof(SCliBatch));
          QUEUE_INIT(&pBatch->wq);
          QUEUE_INIT(&pBatch->listq);

          QUEUE_PUSH(&pBatch->wq, h);
          pBatch->wLen += 1;
          pBatch->batchSize += pMsg->msg.contLen;
          pBatch->pList = *ppBatchList;

          QUEUE_PUSH(&((*ppBatchList)->wq), &pBatch->listq);
          (*ppBatchList)->len += 1;
        }
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      }
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      continue;
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    }
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    (*cliAsyncHandle[pMsg->type])(pMsg, pThrd);
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    count++;
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  }
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  void** pIter = taosHashIterate(pThrd->batchCache, NULL);
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  while (pIter != NULL) {
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    SCliBatchList* batchList = (SCliBatchList*)(*pIter);
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    SCliBatch*     batch = cliGetHeadFromList(batchList);
    if (batch != NULL) {
      cliHandleBatchReq(batch, pThrd);
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    }
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    pIter = (void**)taosHashIterate(pThrd->batchCache, pIter);
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  }

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  if (count >= 2) {
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    tTrace("cli process batch size:%d", count);
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  }
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}

static void cliAsyncCb(uv_async_t* handle) {
  SAsyncItem* item = handle->data;
  SCliThrd*   pThrd = item->pThrd;
  STrans*     pTransInst = pThrd->pTransInst;

  // batch process to avoid to lock/unlock frequently
  queue wq;
  taosThreadMutexLock(&item->mtx);
  QUEUE_MOVE(&item->qmsg, &wq);
  taosThreadMutexUnlock(&item->mtx);

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  if (rpcDebugFlag & DEBUG_TRACE) {
    void* pIter = taosHashIterate(pThrd->msgCount, NULL);
    while (pIter != NULL) {
      int*   count = pIter;
      size_t len = 0;
      char*  key = taosHashGetKey(pIter, &len);
      if (*count != 0) {
        tDebug("key: %s count: %d", key, *count);
      }
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      pIter = taosHashIterate(pThrd->msgCount, pIter);
    }
    tDebug("all conn count: %d", pThrd->newConnCount);
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  }
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  int8_t supportBatch = pTransInst->supportBatch;
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  if (supportBatch == 0) {
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    cliNoBatchDealReq(&wq, pThrd);
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  } else if (supportBatch == 1) {
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    cliBatchDealReq(&wq, pThrd);
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  }
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  if (pThrd->stopMsg != NULL) cliHandleQuit(pThrd->stopMsg, pThrd);
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}
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static void cliPrepareCb(uv_prepare_t* handle) {
  SCliThrd* thrd = handle->data;
  tTrace("prepare work start");

  SAsyncPool* pool = thrd->asyncPool;
  for (int i = 0; i < pool->nAsync; i++) {
    uv_async_t* async = &(pool->asyncs[i]);
    SAsyncItem* item = async->data;

    queue wq;
    taosThreadMutexLock(&item->mtx);
    QUEUE_MOVE(&item->qmsg, &wq);
    taosThreadMutexUnlock(&item->mtx);

    int count = 0;
    while (!QUEUE_IS_EMPTY(&wq)) {
      queue* h = QUEUE_HEAD(&wq);
      QUEUE_REMOVE(h);

      SCliMsg* pMsg = QUEUE_DATA(h, SCliMsg, q);
      (*cliAsyncHandle[pMsg->type])(pMsg, thrd);
      count++;
    }
  }
  tTrace("prepare work end");
  if (thrd->stopMsg != NULL) cliHandleQuit(thrd->stopMsg, thrd);
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}
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1813

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void cliDestroyConnMsgs(SCliConn* conn, bool destroy) {
  transCtxCleanup(&conn->ctx);
  cliReleaseUnfinishedMsg(conn);
  if (destroy == 1) {
    transQueueDestroy(&conn->cliMsgs);
  } else {
    transQueueClear(&conn->cliMsgs);
  }
}

void cliIteraConnMsgs(SCliConn* conn) {
  SCliThrd* pThrd = conn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;

  for (int i = 0; i < transQueueSize(&conn->cliMsgs); i++) {
    SCliMsg* cmsg = transQueueGet(&conn->cliMsgs, i);
    if (cmsg->type == Release || REQUEST_NO_RESP(&cmsg->msg) || cmsg->msg.msgType == TDMT_SCH_DROP_TASK) {
      continue;
    }

    STransMsg resp = {0};
    if (-1 == cliBuildExceptResp(cmsg, &resp)) {
      continue;
    }
    pTransInst->cfp(pTransInst->parent, &resp, NULL);

    cmsg->ctx->ahandle = NULL;
  }
}
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bool cliRecvReleaseReq(SCliConn* conn, STransMsgHead* pHead) {
  if (pHead->release == 1 && (pHead->msgLen) == sizeof(*pHead)) {
    uint64_t ahandle = pHead->ahandle;
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    tDebug("ahandle = %" PRIu64 "", ahandle);
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    SCliMsg* pMsg = NULL;
    CONN_GET_MSGCTX_BY_AHANDLE(conn, ahandle);
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    transClearBuffer(&conn->readBuf);
    transFreeMsg(transContFromHead((char*)pHead));
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    for (int i = 0; ahandle == 0 && i < transQueueSize(&conn->cliMsgs); i++) {
      SCliMsg* cliMsg = transQueueGet(&conn->cliMsgs, i);
      if (cliMsg->type == Release) {
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        ASSERTS(pMsg == NULL, "trans-cli recv invaid release-req");
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        return true;
      }
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    }
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    cliIteraConnMsgs(conn);

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    tDebug("%s conn %p receive release request, refId:%" PRId64 "", CONN_GET_INST_LABEL(conn), conn, conn->refId);
    destroyCmsg(pMsg);
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    addConnToPool(((SCliThrd*)conn->hostThrd)->pool, conn);
    return true;
  }
  return false;
}

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static void* cliWorkThread(void* arg) {
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  SCliThrd* pThrd = (SCliThrd*)arg;
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  pThrd->pid = taosGetSelfPthreadId();
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  setThreadName("trans-cli-work");
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  uv_run(pThrd->loop, UV_RUN_DEFAULT);
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  tDebug("thread quit-thread:%08" PRId64, pThrd->pid);
1879
  return NULL;
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}

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void* transInitClient(uint32_t ip, uint32_t port, char* label, int numOfThreads, void* fp, void* shandle) {
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  SCliObj* cli = taosMemoryCalloc(1, sizeof(SCliObj));
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  STrans* pTransInst = shandle;
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  memcpy(cli->label, label, TSDB_LABEL_LEN);
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  cli->numOfThreads = numOfThreads;
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  cli->pThreadObj = (SCliThrd**)taosMemoryCalloc(cli->numOfThreads, sizeof(SCliThrd*));
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  for (int i = 0; i < cli->numOfThreads; i++) {
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    SCliThrd* pThrd = createThrdObj(shandle);
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    if (pThrd == NULL) {
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      goto _err;
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1894 1895 1896
    }

    int err = taosThreadCreate(&pThrd->thread, NULL, cliWorkThread, (void*)(pThrd));
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    if (err != 0) {
      goto _err;
    } else {
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1900
      tDebug("success to create tranport-cli thread:%d", i);
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1901
    }
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    cli->pThreadObj[i] = pThrd;
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1903 1904
  }
  return cli;
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_err:
  taosMemoryFree(cli->pThreadObj);
  taosMemoryFree(cli);
  return NULL;
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1910
}
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1911

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1912
static FORCE_INLINE void destroyUserdata(STransMsg* userdata) {
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1913 1914 1915 1916 1917 1918
  if (userdata->pCont == NULL) {
    return;
  }
  transFreeMsg(userdata->pCont);
  userdata->pCont = NULL;
}
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1919

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static FORCE_INLINE void destroyCmsg(void* arg) {
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  SCliMsg* pMsg = arg;
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  if (pMsg == NULL) {
    return;
  }
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1925

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1926 1927
  transDestroyConnCtx(pMsg->ctx);
  destroyUserdata(&pMsg->msg);
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1928
  taosMemoryFree(pMsg);
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1929
}
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1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
static FORCE_INLINE void destroyCmsgAndAhandle(void* param) {
  if (param == NULL) return;

  STaskArg* arg = param;
  SCliMsg*  pMsg = arg->param1;
  SCliThrd* pThrd = arg->param2;

  tDebug("destroy Ahandle A");
  if (pThrd != NULL && pThrd->destroyAhandleFp != NULL) {
    tDebug("destroy Ahandle B");
    pThrd->destroyAhandleFp(pMsg->ctx->ahandle);
  }
  tDebug("destroy Ahandle C");

  transDestroyConnCtx(pMsg->ctx);
  destroyUserdata(&pMsg->msg);
  taosMemoryFree(pMsg);
}

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static SCliThrd* createThrdObj(void* trans) {
  STrans* pTransInst = trans;

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  SCliThrd* pThrd = (SCliThrd*)taosMemoryCalloc(1, sizeof(SCliThrd));
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1954

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  QUEUE_INIT(&pThrd->msg);
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  taosThreadMutexInit(&pThrd->msgMtx, NULL);
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  pThrd->loop = (uv_loop_t*)taosMemoryMalloc(sizeof(uv_loop_t));
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1959 1960 1961 1962 1963 1964 1965 1966
  int err = uv_loop_init(pThrd->loop);
  if (err != 0) {
    tError("failed to init uv_loop, reason:%s", uv_err_name(err));
    taosMemoryFree(pThrd->loop);
    taosThreadMutexDestroy(&pThrd->msgMtx);
    taosMemoryFree(pThrd);
    return NULL;
  }
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1967 1968 1969 1970 1971
  if (pTransInst->supportBatch) {
    pThrd->asyncPool = transAsyncPoolCreate(pThrd->loop, 4, pThrd, cliAsyncCb);
  } else {
    pThrd->asyncPool = transAsyncPoolCreate(pThrd->loop, 8, pThrd, cliAsyncCb);
  }
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  if (pThrd->asyncPool == NULL) {
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ref log  
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1973
    tError("failed to init async pool");
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    uv_loop_close(pThrd->loop);
    taosMemoryFree(pThrd->loop);
    taosThreadMutexDestroy(&pThrd->msgMtx);
    taosMemoryFree(pThrd);
    return NULL;
  }
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  pThrd->prepare = taosMemoryCalloc(1, sizeof(uv_prepare_t));
  uv_prepare_init(pThrd->loop, pThrd->prepare);
  pThrd->prepare->data = pThrd;
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  // uv_prepare_start(pThrd->prepare, cliPrepareCb);
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  int32_t timerSize = 64;
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  pThrd->timerList = taosArrayInit(timerSize, sizeof(void*));
  for (int i = 0; i < timerSize; i++) {
    uv_timer_t* timer = taosMemoryCalloc(1, sizeof(uv_timer_t));
    uv_timer_init(pThrd->loop, timer);
    taosArrayPush(pThrd->timerList, &timer);
  }

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  pThrd->pool = createConnPool(4);
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  transDQCreate(pThrd->loop, &pThrd->delayQueue);
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  transDQCreate(pThrd->loop, &pThrd->timeoutQueue);

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  transDQCreate(pThrd->loop, &pThrd->waitConnQueue);

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  pThrd->nextTimeout = taosGetTimestampMs() + CONN_PERSIST_TIME(pTransInst->idleTime);
  pThrd->pTransInst = trans;

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  pThrd->destroyAhandleFp = pTransInst->destroyFp;
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  pThrd->fqdn2ipCache = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
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  pThrd->failFastCache = taosHashInit(8, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);

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  pThrd->batchCache = taosHashInit(8, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
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2010
  pThrd->quit = false;
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  pThrd->newConnCount = 0;
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  pThrd->msgCount = taosHashInit(8, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
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  return pThrd;
}
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2016
static void destroyThrdObj(SCliThrd* pThrd) {
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2017 2018 2019
  if (pThrd == NULL) {
    return;
  }
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2020

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2021
  taosThreadJoin(pThrd->thread, NULL);
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2022
  CLI_RELEASE_UV(pThrd->loop);
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2023
  taosThreadMutexDestroy(&pThrd->msgMtx);
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2024
  TRANS_DESTROY_ASYNC_POOL_MSG(pThrd->asyncPool, SCliMsg, destroyCmsg);
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2025
  transAsyncPoolDestroy(pThrd->asyncPool);
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2026

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2027
  transDQDestroy(pThrd->delayQueue, destroyCmsgAndAhandle);
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  transDQDestroy(pThrd->timeoutQueue, NULL);
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2029
  transDQDestroy(pThrd->waitConnQueue, NULL);
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2030

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  tDebug("thread destroy %" PRId64, pThrd->pid);
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2032 2033 2034 2035 2036
  for (int i = 0; i < taosArrayGetSize(pThrd->timerList); i++) {
    uv_timer_t* timer = taosArrayGetP(pThrd->timerList, i);
    taosMemoryFree(timer);
  }
  taosArrayDestroy(pThrd->timerList);
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  taosMemoryFree(pThrd->prepare);
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  taosMemoryFree(pThrd->loop);
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  taosHashCleanup(pThrd->fqdn2ipCache);
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  taosHashCleanup(pThrd->failFastCache);
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2041 2042 2043

  void** pIter = taosHashIterate(pThrd->batchCache, NULL);
  while (pIter != NULL) {
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    SCliBatchList* pBatchList = (SCliBatchList*)(*pIter);
    while (!QUEUE_IS_EMPTY(&pBatchList->wq)) {
      queue* h = QUEUE_HEAD(&pBatchList->wq);
      QUEUE_REMOVE(h);

      SCliBatch* pBatch = QUEUE_DATA(h, SCliBatch, listq);
      cliDestroyBatch(pBatch);
    }
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    taosMemoryFree(pBatchList->ip);
    taosMemoryFree(pBatchList->dst);
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    taosMemoryFree(pBatchList);
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    pIter = (void**)taosHashIterate(pThrd->batchCache, pIter);
  }
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  taosHashCleanup(pThrd->batchCache);
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  taosHashCleanup(pThrd->msgCount);
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  taosMemoryFree(pThrd);
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}
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static FORCE_INLINE void transDestroyConnCtx(STransConnCtx* ctx) {
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  //
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  taosMemoryFree(ctx);
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}
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void cliSendQuit(SCliThrd* thrd) {
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  // cli can stop gracefully
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  SCliMsg* msg = taosMemoryCalloc(1, sizeof(SCliMsg));
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  msg->type = Quit;
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  transAsyncSend(thrd->asyncPool, &msg->q);
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  atomic_store_8(&thrd->asyncPool->stop, 1);
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}
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void cliWalkCb(uv_handle_t* handle, void* arg) {
  if (!uv_is_closing(handle)) {
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    if (uv_handle_get_type(handle) == UV_TIMER) {
      // SCliConn* pConn = handle->data;
      //  if (pConn != NULL && pConn->timer != NULL) {
      //    SCliThrd* pThrd = pConn->hostThrd;
      //    uv_timer_stop((uv_timer_t*)handle);
      //    handle->data = NULL;
      //    taosArrayPush(pThrd->timerList, &pConn->timer);
      //    pConn->timer = NULL;
      //  }
    } else {
      uv_read_stop((uv_stream_t*)handle);
    }
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    uv_close(handle, cliDestroy);
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  }
}
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FORCE_INLINE int cliRBChoseIdx(STrans* pTransInst) {
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  int32_t index = pTransInst->index;
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  if (pTransInst->numOfThreads == 0) {
    return -1;
  }
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  /*
   * no lock, and to avoid CPU load imbalance, set limit pTransInst->numOfThreads * 2000;
   */
  if (pTransInst->index++ >= pTransInst->numOfThreads * 2000) {
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    pTransInst->index = 0;
  }
  return index % pTransInst->numOfThreads;
}
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static FORCE_INLINE void doDelayTask(void* param) {
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  STaskArg* arg = param;
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  cliHandleReq((SCliMsg*)arg->param1, (SCliThrd*)arg->param2);
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  taosMemoryFree(arg);
}
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static void doCloseIdleConn(void* param) {
  STaskArg* arg = param;
  SCliConn* conn = arg->param1;
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  tDebug("%s conn %p idle, close it", CONN_GET_INST_LABEL(conn), conn);
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  conn->task = NULL;
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  cliDestroyConn(conn, true);
  taosMemoryFree(arg);
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}

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static void cliSchedMsgToNextNode(SCliMsg* pMsg, SCliThrd* pThrd) {
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  STrans*        pTransInst = pThrd->pTransInst;
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  STransConnCtx* pCtx = pMsg->ctx;

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  if (rpcDebugFlag & DEBUG_DEBUG) {
    STraceId* trace = &pMsg->msg.info.traceId;
    char      tbuf[256] = {0};
    EPSET_DEBUG_STR(&pCtx->epSet, tbuf);
    tGDebug("%s retry on next node,use:%s, step: %d,timeout:%" PRId64 "", transLabel(pThrd->pTransInst), tbuf,
            pCtx->retryStep, pCtx->retryNextInterval);
  }
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  STaskArg* arg = taosMemoryMalloc(sizeof(STaskArg));
  arg->param1 = pMsg;
  arg->param2 = pThrd;
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  transDQSched(pThrd->delayQueue, doDelayTask, arg, pCtx->retryNextInterval);
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}
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FORCE_INLINE void cliCompareAndSwap(int8_t* val, int8_t exp, int8_t newVal) {
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  if (*val != exp) {
    *val = newVal;
  }
}
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FORCE_INLINE bool cliTryExtractEpSet(STransMsg* pResp, SEpSet* dst) {
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  if ((pResp == NULL || pResp->info.hasEpSet == 0)) {
    return false;
  }
  // rebuild resp msg
  SEpSet epset;
  if (tDeserializeSEpSet(pResp->pCont, pResp->contLen, &epset) < 0) {
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    return false;
  }
  int32_t tlen = tSerializeSEpSet(NULL, 0, dst);

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  char*   buf = NULL;
  int32_t len = pResp->contLen - tlen;
  if (len != 0) {
    buf = rpcMallocCont(len);
    memcpy(buf, (char*)pResp->pCont + tlen, len);
  }
  rpcFreeCont(pResp->pCont);
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  pResp->pCont = buf;
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  pResp->contLen = len;

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  epsetAssign(dst, &epset);
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  return true;
}
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bool cliResetEpset(STransConnCtx* pCtx, STransMsg* pResp, bool hasEpSet) {
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  bool noDelay = true;
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  if (hasEpSet == false) {
    if (pResp->contLen == 0) {
      if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps) {
        noDelay = false;
      } else {
        EPSET_FORWARD_INUSE(&pCtx->epSet);
      }
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    } else if (pResp->contLen != 0) {
      SEpSet  epSet;
      int32_t valid = tDeserializeSEpSet(pResp->pCont, pResp->contLen, &epSet);
      if (valid < 0) {
        tDebug("get invalid epset, epset equal, continue");
        if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps) {
          noDelay = false;
        } else {
          EPSET_FORWARD_INUSE(&pCtx->epSet);
        }
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      } else {
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        if (!transEpSetIsEqual(&pCtx->epSet, &epSet)) {
          tDebug("epset not equal, retry new epset");
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          epsetAssign(&pCtx->epSet, &epSet);
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          noDelay = false;
        } else {
          if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps) {
            noDelay = false;
          } else {
            tDebug("epset equal, continue");
            EPSET_FORWARD_INUSE(&pCtx->epSet);
          }
        }
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      }
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    }
  } else {
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    SEpSet  epSet;
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    int32_t valid = tDeserializeSEpSet(pResp->pCont, pResp->contLen, &epSet);
    if (valid < 0) {
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      tDebug("get invalid epset, epset equal, continue");
      if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps) {
        noDelay = false;
      } else {
        EPSET_FORWARD_INUSE(&pCtx->epSet);
      }
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    } else {
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      if (!transEpSetIsEqual(&pCtx->epSet, &epSet)) {
        tDebug("epset not equal, retry new epset");
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        epsetAssign(&pCtx->epSet, &epSet);
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        noDelay = false;
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      } else {
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        if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps) {
          noDelay = false;
        } else {
          tDebug("epset equal, continue");
          EPSET_FORWARD_INUSE(&pCtx->epSet);
        }
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      }
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    }
  }
  return noDelay;
}
bool cliGenRetryRule(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
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  SCliThrd* pThrd = pConn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;
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  STransConnCtx* pCtx = pMsg->ctx;
  int32_t        code = pResp->code;
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  bool retry = pTransInst->retry != NULL ? pTransInst->retry(code, pResp->msgType - 1) : false;
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  if (retry == false) {
    return false;
  }
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  if (!pCtx->retryInit) {
    pCtx->retryMinInterval = pTransInst->retryMinInterval;
    pCtx->retryMaxInterval = pTransInst->retryMaxInterval;
    pCtx->retryStepFactor = pTransInst->retryStepFactor;
    pCtx->retryMaxTimeout = pTransInst->retryMaxTimouet;
    pCtx->retryInitTimestamp = taosGetTimestampMs();
    pCtx->retryNextInterval = pCtx->retryMinInterval;
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    pCtx->retryStep = 0;
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    pCtx->retryInit = true;
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    pCtx->retryCode = TSDB_CODE_SUCCESS;
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    // already retry, not use handle specified by app;
    pMsg->msg.info.handle = 0;
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  }
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  if (-1 != pCtx->retryMaxTimeout && taosGetTimestampMs() - pCtx->retryInitTimestamp >= pCtx->retryMaxTimeout) {
    return false;
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  }
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  // code, msgType

  // A:  epset,   leader, not self
  // B:  epset,   not know leader
  // C:  no epset, leader but not serivce

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  bool noDelay = false;
  if (code == TSDB_CODE_RPC_BROKEN_LINK || code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
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    tTrace("code str %s, contlen:%d 0", tstrerror(code), pResp->contLen);
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    noDelay = cliResetEpset(pCtx, pResp, false);
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    transFreeMsg(pResp->pCont);
    transUnrefCliHandle(pConn);
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  } else if (code == TSDB_CODE_SYN_NOT_LEADER || code == TSDB_CODE_SYN_INTERNAL_ERROR ||
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             code == TSDB_CODE_SYN_PROPOSE_NOT_READY || code == TSDB_CODE_VND_STOPPED ||
             code == TSDB_CODE_MNODE_NOT_FOUND || code == TSDB_CODE_APP_IS_STARTING ||
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             code == TSDB_CODE_APP_IS_STOPPING || code == TSDB_CODE_VND_STOPPED) {
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    tTrace("code str %s, contlen:%d 1", tstrerror(code), pResp->contLen);
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    noDelay = cliResetEpset(pCtx, pResp, true);
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    transFreeMsg(pResp->pCont);
    addConnToPool(pThrd->pool, pConn);
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  } else if (code == TSDB_CODE_SYN_RESTORING) {
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    tTrace("code str %s, contlen:%d 0", tstrerror(code), pResp->contLen);
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    noDelay = cliResetEpset(pCtx, pResp, true);
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    addConnToPool(pThrd->pool, pConn);
    transFreeMsg(pResp->pCont);
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  } else {
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    tTrace("code str %s, contlen:%d 0", tstrerror(code), pResp->contLen);
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    noDelay = cliResetEpset(pCtx, pResp, false);
    addConnToPool(pThrd->pool, pConn);
    transFreeMsg(pResp->pCont);
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  }
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  if (code != TSDB_CODE_RPC_BROKEN_LINK && code != TSDB_CODE_RPC_NETWORK_UNAVAIL && code != TSDB_CODE_SUCCESS) {
    // save one internal code
    pCtx->retryCode = code;
  }
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  if (noDelay == false) {
    pCtx->epsetRetryCnt = 1;
    pCtx->retryStep++;
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    int64_t factor = pow(pCtx->retryStepFactor, pCtx->retryStep - 1);
    pCtx->retryNextInterval = factor * pCtx->retryMinInterval;
    if (pCtx->retryNextInterval >= pCtx->retryMaxInterval) {
      pCtx->retryNextInterval = pCtx->retryMaxInterval;
    }
  } else {
    pCtx->retryNextInterval = 0;
    pCtx->epsetRetryCnt++;
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  }
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  pMsg->sent = 0;
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  cliSchedMsgToNextNode(pMsg, pThrd);
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  return true;
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}
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int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
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  SCliThrd* pThrd = pConn->hostThrd;
  STrans*   pTransInst = pThrd->pTransInst;
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  if (pMsg == NULL || pMsg->ctx == NULL) {
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    tTrace("%s conn %p handle resp", pTransInst->label, pConn);
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    pTransInst->cfp(pTransInst->parent, pResp, NULL);
    return 0;
  }
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  STransConnCtx* pCtx = pMsg->ctx;
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  bool retry = cliGenRetryRule(pConn, pResp, pMsg);
  if (retry == true) {
    return -1;
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  }
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  if (pCtx->retryCode != TSDB_CODE_SUCCESS) {
    int32_t code = pResp->code;
    // return internal code app
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    if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK ||
        code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED) {
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      pResp->code = pCtx->retryCode;
    }
  }

2343
  // check whole vnodes is offline on this vgroup
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  if (pCtx->epsetRetryCnt >= pCtx->epSet.numOfEps || pCtx->retryStep > 0) {
    if (pResp->code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
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      pResp->code = TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED;
2347
    } else if (pResp->code == TSDB_CODE_RPC_BROKEN_LINK) {
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      pResp->code = TSDB_CODE_RPC_SOMENODE_BROKEN_LINK;
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    }
  }

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  STraceId* trace = &pResp->info.traceId;
  bool      hasEpSet = cliTryExtractEpSet(pResp, &pCtx->epSet);
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  if (hasEpSet) {
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    if (rpcDebugFlag & DEBUG_TRACE) {
      char tbuf[256] = {0};
      EPSET_DEBUG_STR(&pCtx->epSet, tbuf);
      tGTrace("%s conn %p extract epset from msg", CONN_GET_INST_LABEL(pConn), pConn);
    }
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  }
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  if (rpcDebugFlag & DEBUG_TRACE) {
    if (tmsgIsValid(pResp->msgType - 1)) {
      char buf[128] = {0};
      sprintf(buf, "%s", TMSG_INFO(pResp->msgType - 1));
      int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
      if (NULL == 0) {
        int localCount = 0;
        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
      } else {
        int localCount = *count - 1;
        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
      }
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    }
  }
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  if (pCtx->pSem != NULL) {
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    tGTrace("%s conn %p(sync) handle resp", CONN_GET_INST_LABEL(pConn), pConn);
2377
    if (pCtx->pRsp == NULL) {
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      tGTrace("%s conn %p(sync) failed to resp, ignore", CONN_GET_INST_LABEL(pConn), pConn);
2379 2380 2381
    } else {
      memcpy((char*)pCtx->pRsp, (char*)pResp, sizeof(*pResp));
    }
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2382
    tsem_post(pCtx->pSem);
2383
    pCtx->pRsp = NULL;
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2384
  } else {
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2385
    tGTrace("%s conn %p handle resp", CONN_GET_INST_LABEL(pConn), pConn);
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2386
    if (retry == false && hasEpSet == true) {
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2387
      pTransInst->cfp(pTransInst->parent, pResp, &pCtx->epSet);
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dengyihao 已提交
2388
    } else {
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2389
      if (!cliIsEpsetUpdated(pResp->code, pCtx)) {
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2390 2391 2392 2393
        pTransInst->cfp(pTransInst->parent, pResp, NULL);
      } else {
        pTransInst->cfp(pTransInst->parent, pResp, &pCtx->epSet);
      }
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2394
    }
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2395
  }
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2396
  return 0;
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2397
}
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2398 2399

void transCloseClient(void* arg) {
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2400
  SCliObj* cli = arg;
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2401
  for (int i = 0; i < cli->numOfThreads; i++) {
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ubuntu 已提交
2402
    cliSendQuit(cli->pThreadObj[i]);
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2403
    destroyThrdObj(cli->pThreadObj[i]);
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2404
  }
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2405 2406
  taosMemoryFree(cli->pThreadObj);
  taosMemoryFree(cli);
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2407
}
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void transRefCliHandle(void* handle) {
  if (handle == NULL) {
    return;
  }
  int ref = T_REF_INC((SCliConn*)handle);
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2413
  tTrace("%s conn %p ref %d", CONN_GET_INST_LABEL((SCliConn*)handle), handle, ref);
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  UNUSED(ref);
}
void transUnrefCliHandle(void* handle) {
  if (handle == NULL) {
    return;
  }
  int ref = T_REF_DEC((SCliConn*)handle);
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2421
  tTrace("%s conn %p ref:%d", CONN_GET_INST_LABEL((SCliConn*)handle), handle, ref);
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2422
  if (ref == 0) {
U
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2423
    cliDestroyConn((SCliConn*)handle, true);
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2424 2425
  }
}
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2426
static FORCE_INLINE SCliThrd* transGetWorkThrdFromHandle(STrans* trans, int64_t handle) {
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2427
  SCliThrd*  pThrd = NULL;
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2428
  SExHandle* exh = transAcquireExHandle(transGetRefMgt(), handle);
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2429 2430 2431
  if (exh == NULL) {
    return NULL;
  }
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2432

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2433 2434 2435 2436 2437 2438
  if (exh->pThrd == NULL && trans != NULL) {
    int idx = cliRBChoseIdx(trans);
    if (idx < 0) return NULL;
    exh->pThrd = ((SCliObj*)trans->tcphandle)->pThreadObj[idx];
  }

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2439
  pThrd = exh->pThrd;
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2440
  transReleaseExHandle(transGetRefMgt(), handle);
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2441 2442
  return pThrd;
}
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2443
SCliThrd* transGetWorkThrd(STrans* trans, int64_t handle) {
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2444
  if (handle == 0) {
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2445
    int idx = cliRBChoseIdx(trans);
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2446
    if (idx < 0) return NULL;
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2447 2448
    return ((SCliObj*)trans->tcphandle)->pThreadObj[idx];
  }
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2449
  SCliThrd* pThrd = transGetWorkThrdFromHandle(trans, handle);
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dapan1121 已提交
2450
  return pThrd;
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2451
}
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2452
int transReleaseCliHandle(void* handle) {
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2453 2454 2455
  int  idx = -1;
  bool valid = false;

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2456
  SCliThrd* pThrd = transGetWorkThrdFromHandle(NULL, (int64_t)handle);
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2457
  if (pThrd == NULL) {
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2458
    return -1;
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dengyihao 已提交
2459
  }
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2460

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2461
  STransMsg tmsg = {.info.handle = handle, .info.ahandle = (void*)0x9527};
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rm code  
dengyihao 已提交
2462
  TRACE_SET_MSGID(&tmsg.info.traceId, tGenIdPI64());
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2463

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2464 2465 2466
  STransConnCtx* pCtx = taosMemoryCalloc(1, sizeof(STransConnCtx));
  pCtx->ahandle = tmsg.info.ahandle;

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2467
  SCliMsg* cmsg = taosMemoryCalloc(1, sizeof(SCliMsg));
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2468
  cmsg->msg = tmsg;
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2469
  cmsg->st = taosGetTimestampUs();
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2470
  cmsg->type = Release;
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dengyihao 已提交
2471
  cmsg->ctx = pCtx;
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dengyihao 已提交
2472

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2473 2474 2475
  STraceId* trace = &tmsg.info.traceId;
  tGDebug("send release request at thread:%08" PRId64 "", pThrd->pid);

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dengyihao 已提交
2476
  if (0 != transAsyncSend(pThrd->asyncPool, &cmsg->q)) {
dengyihao's avatar
dengyihao 已提交
2477
    destroyCmsg(cmsg);
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dengyihao 已提交
2478 2479
    return -1;
  }
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dengyihao 已提交
2480
  return 0;
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dengyihao 已提交
2481
}
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2482

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2483
int transSendRequest(void* shandle, const SEpSet* pEpSet, STransMsg* pReq, STransCtx* ctx) {
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2484 2485 2486 2487 2488
  STrans* pTransInst = (STrans*)transAcquireExHandle(transGetInstMgt(), (int64_t)shandle);
  if (pTransInst == NULL) {
    transFreeMsg(pReq->pCont);
    return -1;
  }
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dengyihao 已提交
2489

dengyihao's avatar
dengyihao 已提交
2490
  SCliThrd* pThrd = transGetWorkThrd(pTransInst, (int64_t)pReq->info.handle);
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dengyihao 已提交
2491
  if (pThrd == NULL) {
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dengyihao 已提交
2492
    transFreeMsg(pReq->pCont);
dengyihao's avatar
dengyihao 已提交
2493
    transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
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dengyihao 已提交
2494
    return TSDB_CODE_RPC_BROKEN_LINK;
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dengyihao 已提交
2495 2496
  }

dengyihao's avatar
dengyihao 已提交
2497
  TRACE_SET_MSGID(&pReq->info.traceId, tGenIdPI64());
wafwerar's avatar
wafwerar 已提交
2498
  STransConnCtx* pCtx = taosMemoryCalloc(1, sizeof(STransConnCtx));
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dengyihao 已提交
2499 2500 2501
  epsetAssign(&pCtx->epSet, pEpSet);
  epsetAssign(&pCtx->origEpSet, pEpSet);

S
Shengliang Guan 已提交
2502
  pCtx->ahandle = pReq->info.ahandle;
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dengyihao 已提交
2503
  pCtx->msgType = pReq->msgType;
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dengyihao 已提交
2504

H
Haojun Liao 已提交
2505
  if (ctx != NULL) pCtx->appCtx = *ctx;
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dengyihao 已提交
2506

wafwerar's avatar
wafwerar 已提交
2507
  SCliMsg* cliMsg = taosMemoryCalloc(1, sizeof(SCliMsg));
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dengyihao 已提交
2508
  cliMsg->ctx = pCtx;
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dengyihao 已提交
2509
  cliMsg->msg = *pReq;
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dengyihao 已提交
2510
  cliMsg->st = taosGetTimestampUs();
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dengyihao 已提交
2511
  cliMsg->type = Normal;
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dengyihao 已提交
2512
  cliMsg->refId = (int64_t)shandle;
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dengyihao 已提交
2513

dengyihao's avatar
dengyihao 已提交
2514
  STraceId* trace = &pReq->info.traceId;
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dengyihao 已提交
2515 2516
  tGDebug("%s send request at thread:%08" PRId64 ", dst:%s:%d, app:%p", transLabel(pTransInst), pThrd->pid,
          EPSET_GET_INUSE_IP(&pCtx->epSet), EPSET_GET_INUSE_PORT(&pCtx->epSet), pReq->info.ahandle);
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dengyihao 已提交
2517 2518
  if (0 != transAsyncSend(pThrd->asyncPool, &(cliMsg->q))) {
    destroyCmsg(cliMsg);
dengyihao's avatar
dengyihao 已提交
2519
    transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
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dengyihao 已提交
2520 2521
    return -1;
  }
dengyihao's avatar
dengyihao 已提交
2522
  transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2523
  return 0;
dengyihao's avatar
dengyihao 已提交
2524
}
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dengyihao 已提交
2525

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dengyihao 已提交
2526
int transSendRecv(void* shandle, const SEpSet* pEpSet, STransMsg* pReq, STransMsg* pRsp) {
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dengyihao 已提交
2527 2528 2529 2530 2531
  STrans* pTransInst = (STrans*)transAcquireExHandle(transGetInstMgt(), (int64_t)shandle);
  if (pTransInst == NULL) {
    transFreeMsg(pReq->pCont);
    return -1;
  }
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dengyihao 已提交
2532

dengyihao's avatar
dengyihao 已提交
2533 2534
  SCliThrd* pThrd = transGetWorkThrd(pTransInst, (int64_t)pReq->info.handle);
  if (pThrd == NULL) {
dengyihao's avatar
dengyihao 已提交
2535
    transFreeMsg(pReq->pCont);
dengyihao's avatar
dengyihao 已提交
2536
    transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2537
    return TSDB_CODE_RPC_BROKEN_LINK;
dengyihao's avatar
dengyihao 已提交
2538
  }
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dengyihao 已提交
2539

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dengyihao 已提交
2540 2541
  tsem_t* sem = taosMemoryCalloc(1, sizeof(tsem_t));
  tsem_init(sem, 0, 0);
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dengyihao 已提交
2542

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dengyihao 已提交
2543 2544
  TRACE_SET_MSGID(&pReq->info.traceId, tGenIdPI64());

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wafwerar 已提交
2545
  STransConnCtx* pCtx = taosMemoryCalloc(1, sizeof(STransConnCtx));
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dengyihao 已提交
2546 2547
  epsetAssign(&pCtx->epSet, pEpSet);
  epsetAssign(&pCtx->origEpSet, pEpSet);
S
Shengliang Guan 已提交
2548
  pCtx->ahandle = pReq->info.ahandle;
dengyihao's avatar
dengyihao 已提交
2549
  pCtx->msgType = pReq->msgType;
dengyihao's avatar
dengyihao 已提交
2550
  pCtx->pSem = sem;
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dengyihao 已提交
2551 2552
  pCtx->pRsp = pRsp;

wafwerar's avatar
wafwerar 已提交
2553
  SCliMsg* cliMsg = taosMemoryCalloc(1, sizeof(SCliMsg));
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dengyihao 已提交
2554 2555 2556
  cliMsg->ctx = pCtx;
  cliMsg->msg = *pReq;
  cliMsg->st = taosGetTimestampUs();
dengyihao's avatar
dengyihao 已提交
2557
  cliMsg->type = Normal;
dengyihao's avatar
dengyihao 已提交
2558
  cliMsg->refId = (int64_t)shandle;
dengyihao's avatar
dengyihao 已提交
2559

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dengyihao 已提交
2560
  STraceId* trace = &pReq->info.traceId;
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dengyihao 已提交
2561 2562
  tGDebug("%s send request at thread:%08" PRId64 ", dst:%s:%d, app:%p", transLabel(pTransInst), pThrd->pid,
          EPSET_GET_INUSE_IP(&pCtx->epSet), EPSET_GET_INUSE_PORT(&pCtx->epSet), pReq->info.ahandle);
dengyihao's avatar
dengyihao 已提交
2563

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dengyihao 已提交
2564 2565
  int ret = transAsyncSend(pThrd->asyncPool, &cliMsg->q);
  if (ret != 0) {
dengyihao's avatar
dengyihao 已提交
2566
    destroyCmsg(cliMsg);
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dengyihao 已提交
2567
    goto _RETURN;
dengyihao's avatar
dengyihao 已提交
2568
  }
dengyihao's avatar
dengyihao 已提交
2569
  tsem_wait(sem);
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dengyihao 已提交
2570 2571

_RETURN:
dengyihao's avatar
dengyihao 已提交
2572 2573
  tsem_destroy(sem);
  taosMemoryFree(sem);
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dengyihao 已提交
2574
  transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2575
  return ret;
dengyihao's avatar
dengyihao 已提交
2576
}
dengyihao's avatar
dengyihao 已提交
2577 2578 2579
/*
 *
 **/
dengyihao's avatar
dengyihao 已提交
2580
int transSetDefaultAddr(void* shandle, const char* ip, const char* fqdn) {
dengyihao's avatar
dengyihao 已提交
2581
  STrans* pTransInst = (STrans*)transAcquireExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2582 2583 2584
  if (pTransInst == NULL) {
    return -1;
  }
dengyihao's avatar
dengyihao 已提交
2585 2586 2587

  SCvtAddr cvtAddr = {0};
  if (ip != NULL && fqdn != NULL) {
dengyihao's avatar
dengyihao 已提交
2588 2589
    tstrncpy(cvtAddr.ip, ip, sizeof(cvtAddr.ip));
    tstrncpy(cvtAddr.fqdn, fqdn, sizeof(cvtAddr.fqdn));
dengyihao's avatar
dengyihao 已提交
2590 2591
    cvtAddr.cvt = true;
  }
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dengyihao 已提交
2592 2593
  for (int i = 0; i < pTransInst->numOfThreads; i++) {
    STransConnCtx* pCtx = taosMemoryCalloc(1, sizeof(STransConnCtx));
dengyihao's avatar
dengyihao 已提交
2594
    pCtx->cvtAddr = cvtAddr;
dengyihao's avatar
dengyihao 已提交
2595 2596 2597 2598

    SCliMsg* cliMsg = taosMemoryCalloc(1, sizeof(SCliMsg));
    cliMsg->ctx = pCtx;
    cliMsg->type = Update;
dengyihao's avatar
dengyihao 已提交
2599
    cliMsg->refId = (int64_t)shandle;
dengyihao's avatar
dengyihao 已提交
2600

dengyihao's avatar
dengyihao 已提交
2601
    SCliThrd* thrd = ((SCliObj*)pTransInst->tcphandle)->pThreadObj[i];
S
Shengliang Guan 已提交
2602
    tDebug("%s update epset at thread:%08" PRId64, pTransInst->label, thrd->pid);
dengyihao's avatar
dengyihao 已提交
2603

dengyihao's avatar
dengyihao 已提交
2604 2605
    if (transAsyncSend(thrd->asyncPool, &(cliMsg->q)) != 0) {
      destroyCmsg(cliMsg);
dengyihao's avatar
dengyihao 已提交
2606
      transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2607 2608
      return -1;
    }
dengyihao's avatar
dengyihao 已提交
2609
  }
dengyihao's avatar
dengyihao 已提交
2610
  transReleaseExHandle(transGetInstMgt(), (int64_t)shandle);
dengyihao's avatar
dengyihao 已提交
2611
  return 0;
dengyihao's avatar
dengyihao 已提交
2612
}
dengyihao's avatar
dengyihao 已提交
2613 2614 2615 2616 2617

int64_t transAllocHandle() {
  SExHandle* exh = taosMemoryCalloc(1, sizeof(SExHandle));
  exh->refId = transAddExHandle(transGetRefMgt(), exh);
  tDebug("pre alloc refId %" PRId64 "", exh->refId);
dengyihao's avatar
dengyihao 已提交
2618

dengyihao's avatar
dengyihao 已提交
2619 2620
  return exh->refId;
}