fix deadlock while free tsc object

taosdata · May 29, 2020 · 706b535 · 706b535
1 parent 1a9fc80
commit 706b535
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
@@ -591,7 +591,10 @@ void taos_free_result_imp(TAOS_RES *res, int keepCmd) {
     tscProcessSql(pSql);
 
     // waits for response and then goes on
-    sem_wait(&pSql->rspSem);
+    STscObj* pTscObj = pSql->pTscObj;
+    if (pTscObj->pSql == pSql) {
+      sem_wait(&pSql->rspSem);
+    }
   } else { // if no free resource msg is sent to vnode, we free this object immediately.
     STscObj* pTscObj = pSql->pTscObj;