[td-225] use the dnodeConn instead of mgmtConn and vnodeConn

src/client/inc/tsclient.h

@@ -304,6 +304,7 @@ typedef struct STscObj {
   struct SSqlObj *   pHb;
   struct SSqlObj *   sqlList;
   struct SSqlStream *streamList;
+  void*              pDnodeConn;
   pthread_mutex_t    mutex;
 } STscObj;
 
@@ -359,7 +360,7 @@ typedef struct SSqlStream {
   struct SSqlStream *prev, *next;
 } SSqlStream;
 
-int32_t tscInitRpc(const char *user, const char *secret);
+int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn);
 void    tscInitMsgsFp();
 
 int tsParseSql(SSqlObj *pSql, bool multiVnodeInsertion);
@@ -425,7 +426,6 @@ void    tscQueueAsyncFreeResult(SSqlObj *pSql);
 int32_t tscToSQLCmd(SSqlObj *pSql, struct SSqlInfo *pInfo);
 void    tscGetResultColumnChr(SSqlRes *pRes, SFieldInfo* pFieldInfo, int32_t column);
 
-extern void *    pDnodeConn;
 extern void *    tscCacheHandle;
 extern void *    tscTmr;
 extern void *    tscQhandle;

src/client/src/tscServer.c

@@ -191,6 +191,7 @@ void tscProcessActivityTimer(void *handle, void *tmrId) {
 }
 
 int tscSendMsgToServer(SSqlObj *pSql) {
+  STscObj* pObj = pSql->pTscObj;
   SSqlCmd* pCmd = &pSql->cmd;
   
   char *pMsg = rpcMallocCont(pCmd->payloadLen);
@@ -215,7 +216,7 @@ int tscSendMsgToServer(SSqlObj *pSql) {
       .handle  = pSql,
       .code    = 0
   };
-  rpcSendRequest(pDnodeConn, &pSql->ipList, &rpcMsg);
+  rpcSendRequest(pObj->pDnodeConn, &pSql->ipList, &rpcMsg);
 
   return TSDB_CODE_SUCCESS;
 }

src/client/src/tscSql.c

@@ -65,8 +65,9 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
     terrno = TSDB_CODE_INVALID_PASS;
     return NULL;
   }
-
-  if (tscInitRpc(user, pass) != 0) {
+  
+  void *pDnodeConn = NULL;
+  if (tscInitRpc(user, pass, &pDnodeConn) != 0) {
     terrno = TSDB_CODE_NETWORK_UNAVAIL;
     return NULL;
   }
@@ -93,6 +94,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   STscObj *pObj = (STscObj *)calloc(1, sizeof(STscObj));
   if (NULL == pObj) {
     terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    rpcClose(pDnodeConn);
     return NULL;
   }
 
@@ -106,8 +108,9 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
     int32_t len = strlen(db);
     /* db name is too long */
     if (len > TSDB_DB_NAME_LEN) {
-      free(pObj);
       terrno = TSDB_CODE_INVALID_DB;
+      rpcClose(pDnodeConn);
+      free(pObj);
       return NULL;
     }
 
@@ -123,6 +126,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   SSqlObj *pSql = (SSqlObj *)calloc(1, sizeof(SSqlObj));
   if (NULL == pSql) {
     terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    rpcClose(pDnodeConn);
     free(pObj);
     return NULL;
   }
@@ -134,6 +138,8 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   tsem_init(&pSql->rspSem, 0, 0);
   
   pObj->pSql = pSql;
+  pObj->pDnodeConn = pDnodeConn;
+  
   pSql->fp = fp;
   pSql->param = param;
   if (taos != NULL) {
@@ -143,6 +149,7 @@ STscObj *taosConnectImpl(const char *ip, const char *user, const char *pass, con
   pSql->cmd.command = TSDB_SQL_CONNECT;
   if (TSDB_CODE_SUCCESS != tscAllocPayload(&pSql->cmd, TSDB_DEFAULT_PAYLOAD_SIZE)) {
     terrno = TSDB_CODE_CLI_OUT_OF_MEMORY;
+    rpcClose(pDnodeConn);
     free(pSql);
     free(pObj);
     return NULL;

src/client/src/tscSystem.c

@@ -30,7 +30,6 @@
 #include "tlocale.h"
 
 // global, not configurable
-void *  pDnodeConn;
 void *  tscCacheHandle;
 void *  tscTmr;
 void *  tscQhandle;
@@ -48,12 +47,12 @@ void tscCheckDiskUsage(void *UNUSED_PARAM(para), void* UNUSED_PARAM(param)) {
   taosTmrReset(tscCheckDiskUsage, 1000, NULL, tscTmr, &tscCheckDiskUsageTmr);
 }
 
-int32_t tscInitRpc(const char *user, const char *secret) {
+int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn) {
   SRpcInit rpcInit;
   char secretEncrypt[32] = {0};
   taosEncryptPass((uint8_t *)secret, strlen(secret), secretEncrypt);
 
-  if (pDnodeConn == NULL) {
+  if (*pDnodeConn == NULL) {
     memset(&rpcInit, 0, sizeof(rpcInit));
     rpcInit.localPort = 0;
     rpcInit.label = "TSC";
@@ -66,9 +65,9 @@ int32_t tscInitRpc(const char *user, const char *secret) {
     rpcInit.ckey = "key";
     rpcInit.secret = secretEncrypt;
 
-    pDnodeConn = rpcOpen(&rpcInit);
-    if (pDnodeConn == NULL) {
-      tscError("failed to init connection to vnode");
+    *pDnodeConn = rpcOpen(&rpcInit);
+    if (*pDnodeConn == NULL) {
+      tscError("failed to init connection to TDengine");
       return -1;
     }
   }
@@ -168,11 +167,6 @@ void taos_cleanup() {
   
   taosCloseLog();
   
-  if (pDnodeConn != NULL) {
-    rpcClose(pDnodeConn);
-    pDnodeConn = NULL;
-  }
-  
   taosTmrCleanUp(tscTmr);
 }
 

src/client/src/tscUtil.c

@@ -762,6 +762,10 @@ void tscCloseTscObj(STscObj* pObj) {
   
   pthread_mutex_destroy(&pObj->mutex);
   
+  if (pObj->pDnodeConn != NULL) {
+    rpcClose(pObj->pDnodeConn);
+  }
+  
   tscTrace("%p DB connection is closed", pObj);
   tfree(pObj);
 }