diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 8d86f046ef5dcb0ae55f75683430a93b2814c683..0613f3524271ed0474f16ff1437ea61aea35cab7 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -199,17 +199,20 @@ void tscProcessActivityTimer(void *handle, void *tmrId) {
     pObj->pHb = pSql;
     tscAddSubqueryInfo(&pObj->pHb->cmd);
 
-    tscDebug("%p pHb is allocated, pObj:%p", pObj->pHb, pObj);
+    tscDebug("%p HB is allocated, pObj:%p", pObj->pHb, pObj);
   }
 
   if (tscShouldFreeHeatBeat(pObj->pHb)) {
-    tscDebug("%p free HB object and release connection", pObj);
+    tscDebug("%p free HB object and release connection", pObj->pHb);
     tscFreeSqlObj(pObj->pHb);
     tscCloseTscObj(pObj);
-    return;
+  } else {
+//    taosMsleep(500);
+    int32_t code = tscProcessSql(pObj->pHb);
+    if (code != TSDB_CODE_SUCCESS) {
+      tscError("%p failed to sent HB to server, reason:%s", pObj->pHb, tstrerror(code));
+    }
   }
-
-  tscProcessSql(pObj->pHb);
 }
 
 int tscSendMsgToServer(SSqlObj *pSql) {
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 2c48c76b1ccdca0f78fa0ba627773eff9423d353..94ab3a0c75acba62d9070c8549e17349fa3f0ac2 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -181,6 +181,7 @@ TAOS *taos_connect(const char *ip, const char *user, const char *pass, const cha
 
   return NULL;
 }
+
 TAOS *taos_connect_c(const char *ip, uint8_t ipLen, const char *user, uint8_t userLen, 
     const char *pass, uint8_t passLen, const char *db, uint8_t dbLen, uint16_t port) {
     char ipBuf[TSDB_EP_LEN] = {0};