after kill client connection in taosd can not create stream normally

src/client/inc/tsclient.h

@@ -405,6 +405,7 @@ typedef struct SSqlObj {
 
 typedef struct SSqlStream {
   SSqlObj *pSql;
+  void *  cqhandle;  // stream belong to SCQContext handle
   const char* dstTable;
   uint32_t streamId;
   char     listed;

src/client/src/tscProfile.c

@@ -19,6 +19,7 @@
 #include "ttimer.h"
 #include "tutil.h"
 #include "taosmsg.h"
+#include "tcq.h"
 
 #include "taos.h"
 
@@ -294,6 +295,18 @@ int tscBuildQueryStreamDesc(void *pMsg, STscObj *pObj) {
   return msgLen;
 }
 
+// cqContext->dbconn is killed then call this callback
+void cqConnKilledNotify(void* handle, void* conn) {
+  if (handle == NULL || conn == NULL){
+    return ;
+  } 
+
+  SCqContext* pContext = (SCqContext*) handle;
+  if (pContext->dbConn == conn){
+    atomic_store_ptr(&(pContext->dbConn), NULL);
+  } 
+}
+
 void tscKillConnection(STscObj *pObj) {
   // get stream header by locked
   pthread_mutex_lock(&pObj->mutex);
@@ -302,6 +315,8 @@ void tscKillConnection(STscObj *pObj) {
 
   while (pStream) {
     SSqlStream *tmp = pStream->next;
+    // set associate variant to NULL
+    cqConnKilledNotify(pStream->cqhandle, pObj);
     // taos_close_stream function call pObj->mutet lock , careful death-lock
     taos_close_stream(pStream);
     pStream = tmp;
@@ -310,3 +325,4 @@ void tscKillConnection(STscObj *pObj) {
   tscDebug("connection:%p is killed", pObj);
   taos_close(pObj);
 }
+

src/client/src/tscStream.c

@@ -666,7 +666,7 @@ void cbParseSql(void* param, TAOS_RES* res, int code) {
 }
 
 TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
-                              int64_t stime, void *param, void (*callback)(void *)) {
+                              int64_t stime, void *param, void (*callback)(void *), void* cqhandle) {
   STscObj *pObj = (STscObj *)taos;
   if (pObj == NULL || pObj->signature != pObj) return NULL;
 
@@ -699,6 +699,7 @@ TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const c
   pStream->callback = callback;
   pStream->param = param;
   pStream->pSql = pSql;
+  pStream->cqhandle = cqhandle;
   pSql->pStream = pStream;
   pSql->param = pStream;
   pSql->maxRetry = TSDB_MAX_REPLICA;
@@ -739,7 +740,7 @@ TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* dstTable, const c
 
 TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
                               int64_t stime, void *param, void (*callback)(void *)) {  
-  return taos_open_stream_withname(taos, "", sqlstr, fp, stime, param, callback);
+  return taos_open_stream_withname(taos, "", sqlstr, fp, stime, param, callback, NULL);
 }
 
 void taos_close_stream(TAOS_STREAM *handle) {

src/cq/src/cqMain.c

@@ -38,21 +38,6 @@
 #define cDebug(...) { if (cqDebugFlag & DEBUG_DEBUG) { taosPrintLog("CQ  ", cqDebugFlag, __VA_ARGS__); }}
 #define cTrace(...) { if (cqDebugFlag & DEBUG_TRACE) { taosPrintLog("CQ  ", cqDebugFlag, __VA_ARGS__); }}
 
-typedef struct {
-  int32_t  vgId;
-  int32_t  master;
-  int32_t  num;      // number of continuous streams
-  char     user[TSDB_USER_LEN];
-  char     pass[TSDB_KEY_LEN];
-  char     db[TSDB_DB_NAME_LEN];
-  FCqWrite cqWrite;
-  struct SCqObj *pHead;
-  void    *dbConn;
-  void    *tmrCtrl;
-  pthread_mutex_t mutex;
-  int32_t delete;
-  int32_t cqObjNum;
-} SCqContext;
 
 typedef struct SCqObj {
   tmr_h          tmrId;
@@ -439,7 +424,7 @@ static void cqProcessCreateTimer(void *param, void *tmrId) {
 
 // inner implement in tscStream.c
 TAOS_STREAM *taos_open_stream_withname(TAOS *taos, const char* desName, const char *sqlstr, void (*fp)(void *param, TAOS_RES *, TAOS_ROW row),
-                              int64_t stime, void *param, void (*callback)(void *));
+                              int64_t stime, void *param, void (*callback)(void *), void* cqhandle);
 
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   pObj->pContext = pContext;
@@ -453,7 +438,8 @@ static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   pObj->tmrId = 0;
 
   if (pObj->pStream == NULL) {
-    pObj->pStream = taos_open_stream_withname(pContext->dbConn, pObj->dstTable, pObj->sqlStr, cqProcessStreamRes, INT64_MIN, (void *)pObj->rid, NULL);
+    pObj->pStream = taos_open_stream_withname(pContext->dbConn, pObj->dstTable, pObj->sqlStr, cqProcessStreamRes, \
+                                               INT64_MIN, (void *)pObj->rid, NULL, pContext);
 
     // TODO the pObj->pStream may be released if error happens
     if (pObj->pStream) {

src/inc/tcq.h

@@ -31,6 +31,23 @@ typedef struct {
   FCqWrite cqWrite;
 } SCqCfg;
 
+// SCqContext
+typedef struct {
+  int32_t  vgId;
+  int32_t  master;
+  int32_t  num;      // number of continuous streams
+  char     user[TSDB_USER_LEN];
+  char     pass[TSDB_KEY_LEN];
+  char     db[TSDB_DB_NAME_LEN];
+  FCqWrite cqWrite;
+  struct SCqObj *pHead;
+  void    *dbConn;
+  void    *tmrCtrl;
+  pthread_mutex_t mutex;
+  int32_t delete;
+  int32_t cqObjNum;
+} SCqContext;
+
 // the following API shall be called by vnode
 void *cqOpen(void *ahandle, const SCqCfg *pCfg);
 void  cqClose(void *handle);