[td-11818]check error in rsp.

source/client/src/clientMsgHandler.c

@@ -269,7 +269,14 @@ int32_t processCreateTableRsp(void* param, const SDataBuf* pMsg, int32_t code) {
 int32_t processDropDbRsp(void* param, const SDataBuf* pMsg, int32_t code) {
   // todo: Remove cache in catalog cache.
   SRequestObj* pRequest = param;
+  if (code != TSDB_CODE_SUCCESS) {
+    setErrno(pRequest, code);
+    tsem_post(&pRequest->body.rspSem);
+    return code;
+  }
+
   tsem_post(&pRequest->body.rspSem);
+  return code;
 }
 
 void initMsgHandleFp() {