diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 6805e4d501..2173df5ead 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -42,7 +42,7 @@ volatile int32_t    tscInitRes = 0;
 
 void initTscQhandle() {
   // init handle
-  tscQhandle = taosInitScheduler(4096, 5, "tsc");
+  tscQhandle = taosInitScheduler(4096, 5, "tscQ");
 }
 
 void cleanupTscQhandle() {
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 25ba63fd34..df1268858a 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -153,7 +153,7 @@ int32_t buildRequest(uint64_t connId, const char* sql, int sqlLen, void* param,
   *pRequest = createRequest(connId, TSDB_SQL_SELECT);
   if (*pRequest == NULL) {
     tscError("failed to malloc sqlObj, %s", sql);
-    return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    return terrno;
   }
 
   (*pRequest)->sqlstr = taosMemoryMalloc(sqlLen + 1);
diff --git a/source/util/src/tlockfree.c b/source/util/src/tlockfree.c
index 69ab6c1a52..6f7b6f6901 100644
--- a/source/util/src/tlockfree.c
+++ b/source/util/src/tlockfree.c
@@ -44,7 +44,7 @@ void taosWLockLatch(SRWLatch *pLatch) {
   nLoops = 0;
   while (1) {
     oLatch = atomic_load_32(pLatch);
-    if (0 == oLatch) break;
+    if (oLatch == TD_RWLATCH_WRITE_FLAG) break;
     nLoops++;
     if (nLoops > 1000) {
       sched_yield();
diff --git a/source/util/src/tsched.c b/source/util/src/tsched.c
index 691a0d34d4..9abce966f5 100644
--- a/source/util/src/tsched.c
+++ b/source/util/src/tsched.c
@@ -129,7 +129,7 @@ void *taosProcessSchedQueue(void *scheduler) {
   while (1) {
     if ((ret = tsem_wait(&pSched->fullSem)) != 0) {
       uFatal("wait %s fullSem failed(%s)", pSched->label, strerror(errno));
-      exit(ret);
+      ASSERT(0);
     }
     if (pSched->stop) {
       break;
@@ -137,7 +137,7 @@ void *taosProcessSchedQueue(void *scheduler) {
 
     if ((ret = taosThreadMutexLock(&pSched->queueMutex)) != 0) {
       uFatal("lock %s queueMutex failed(%s)", pSched->label, strerror(errno));
-      exit(ret);
+      ASSERT(0);
     }
 
     msg = pSched->queue[pSched->fullSlot];
@@ -146,12 +146,12 @@ void *taosProcessSchedQueue(void *scheduler) {
 
     if ((ret = taosThreadMutexUnlock(&pSched->queueMutex)) != 0) {
       uFatal("unlock %s queueMutex failed(%s)", pSched->label, strerror(errno));
-      exit(ret);
+      ASSERT(0);
     }
 
     if ((ret = tsem_post(&pSched->emptySem)) != 0) {
       uFatal("post %s emptySem failed(%s)", pSched->label, strerror(errno));
-      exit(ret);
+      ASSERT(0);
     }
 
     if (msg.fp)
@@ -174,12 +174,12 @@ void taosScheduleTask(void *queueScheduler, SSchedMsg *pMsg) {
 
   if ((ret = tsem_wait(&pSched->emptySem)) != 0) {
     uFatal("wait %s emptySem failed(%s)", pSched->label, strerror(errno));
-    exit(ret);
+    ASSERT(0);
   }
 
   if ((ret = taosThreadMutexLock(&pSched->queueMutex)) != 0) {
     uFatal("lock %s queueMutex failed(%s)", pSched->label, strerror(errno));
-    exit(ret);
+    ASSERT(0);
   }
 
   pSched->queue[pSched->emptySlot] = *pMsg;
@@ -187,12 +187,12 @@ void taosScheduleTask(void *queueScheduler, SSchedMsg *pMsg) {
 
   if ((ret = taosThreadMutexUnlock(&pSched->queueMutex)) != 0) {
     uFatal("unlock %s queueMutex failed(%s)", pSched->label, strerror(errno));
-    exit(ret);
+    ASSERT(0);
   }
 
   if ((ret = tsem_post(&pSched->fullSem)) != 0) {
     uFatal("post %s fullSem failed(%s)", pSched->label, strerror(errno));
-    exit(ret);
+    ASSERT(0);
   }
 }
 
@@ -200,6 +200,8 @@ void taosCleanUpScheduler(void *param) {
   SSchedQueue *pSched = (SSchedQueue *)param;
   if (pSched == NULL) return;
 
+  uDebug("start to cleanup %s schedQsueue", pSched->label);
+  
   pSched->stop = true;
   for (int32_t i = 0; i < pSched->numOfThreads; ++i) {
     if (taosCheckPthreadValid(pSched->qthread[i])) {
diff --git a/tests/script/api/stopquery.c b/tests/script/api/stopquery.c
index a42e9e2d44..92baf43d85 100644
--- a/tests/script/api/stopquery.c
+++ b/tests/script/api/stopquery.c
@@ -85,10 +85,12 @@ static void sqExecSQLE(TAOS *taos, char *command) {
   taos_free_result(pSql);
 }
 
+void sqError(char* prefix, const char* errMsg) {
+  fprintf(stderr, "%s error: %s\n", prefix, errMsg);
+}
 
 void sqExit(char* prefix, const char* errMsg) {
-  fprintf(stderr, "%s error: %s\n", prefix, errMsg);
-  sleep(10000);
+  sqError(prefix, errMsg);
   exit(1);
 }
 
@@ -208,7 +210,9 @@ void sqAsyncQueryCb(void *param, TAOS_RES *pRes, int code) {
       *qParam->end = 1;
     }
   } else {
-    sqExit("select", taos_errstr(pRes));
+    sqError("select", taos_errstr(pRes));
+    *qParam->end = 1;
+    taos_free_result(pRes);
   }
 }
 
@@ -463,8 +467,6 @@ void *closeThreadFp(void *arg) {
   }
 }
 
-
-
 void *killThreadFp(void *arg) {
   SSP_CB_PARAM* qParam = (SSP_CB_PARAM*)arg;
   while (true) {
@@ -477,6 +479,19 @@ void *killThreadFp(void *arg) {
   }
 }
 
+void *cleanupThreadFp(void *arg) {
+  SSP_CB_PARAM* qParam = (SSP_CB_PARAM*)arg;
+  while (true) {
+    if (qParam->taos) {
+      usleep(rand() % 10000);
+      taos_cleanup();
+      break;
+    }
+    usleep(1);
+  }
+}
+
+
 
 
 int sqConCloseSyncQuery(bool fetch) {
@@ -607,9 +622,40 @@ int sqConKillAsyncQuery(bool fetch) {
   CASE_LEAVE();  
 }
 
+int sqConCleanupSyncQuery(bool fetch) {
+  CASE_ENTER();  
+  pthread_t qid, cid;
+  for (int32_t i = 0; i < runTimes; ++i) {
+    SSP_CB_PARAM param = {0};
+    param.fetch = fetch;
+    pthread_create(&qid, NULL, syncQueryThreadFp, (void*)&param);
+    pthread_create(&cid, NULL, cleanupThreadFp, (void*)&param);
+    
+    pthread_join(qid, NULL);
+    pthread_join(cid, NULL);
+  }
+  CASE_LEAVE();  
+}
+
+int sqConCleanupAsyncQuery(bool fetch) {
+  CASE_ENTER();  
+  pthread_t qid, cid;
+  for (int32_t i = 0; i < runTimes; ++i) {
+    SSP_CB_PARAM param = {0};
+    param.fetch = fetch;
+    pthread_create(&qid, NULL, asyncQueryThreadFp, (void*)&param);
+    pthread_create(&cid, NULL, cleanupThreadFp, (void*)&param);
+    
+    pthread_join(qid, NULL);
+    pthread_join(cid, NULL);
+  }
+  CASE_LEAVE();  
+}
+
 
 
 void sqRunAllCase(void) {
+#if 0
   sqStopSyncQuery(false);
   sqStopSyncQuery(true);
   sqStopAsyncQuery(false);
@@ -638,11 +684,16 @@ void sqRunAllCase(void) {
 
   sqConKillSyncQuery(false);
   sqConKillSyncQuery(true);
-#if 0  
   sqConKillAsyncQuery(false);
   sqConKillAsyncQuery(true);
 #endif
 
+  sqConCleanupSyncQuery(false);
+  sqConCleanupSyncQuery(true);
+  sqConCleanupAsyncQuery(false);
+  sqConCleanupAsyncQuery(true);
+
+
   int32_t l = 5;
   while (l) {
     printf("%d\n", l--);