diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index 78e2bc9d2d9786ba41f47fae98b70d693f398273..b228deb8ed9c53e2d772a69421657a924b78b962 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -48,8 +48,6 @@ int32_t genericRspCallback(void* param, SDataBuf* pMsg, int32_t code) {
 int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
   SRequestObj *pRequest = acquireRequest(*(int64_t*)param);
   if (NULL == pRequest) {
-    setErrno(pRequest, TSDB_CODE_TSC_DISCONNECTED);
-    tsem_post(&pRequest->body.rspSem);
     goto End;
   }
   
diff --git a/source/common/src/tname.c b/source/common/src/tname.c
index 4d83b6e3d84bfd2ab123efd0720b90ebca18ce81..0d47ef1e7f70c791a32feaa6b4075bd9c625d69f 100644
--- a/source/common/src/tname.c
+++ b/source/common/src/tname.c
@@ -316,6 +316,7 @@ static int compareKv(const void* p1, const void* p2) {
 void buildChildTableName(RandTableName* rName) {
   SStringBuilder sb = {0};
   taosStringBuilderAppendStringLen(&sb, rName->stbFullName, rName->stbFullNameLen);
+  if(sb.buf == NULL) return;
   taosArraySort(rName->tags, compareKv);
   for (int j = 0; j < taosArrayGetSize(rName->tags); ++j) {
     taosStringBuilderAppendChar(&sb, ',');