diff --git a/source/libs/executor/src/sortoperator.c b/source/libs/executor/src/sortoperator.c
index fe95dc613e..8e3898fe2f 100644
--- a/source/libs/executor/src/sortoperator.c
+++ b/source/libs/executor/src/sortoperator.c
@@ -463,7 +463,7 @@ SOperatorInfo* createGroupSortOperatorInfo(SOperatorInfo* downstream, SGroupSort
   pInfo->pColMatchInfo = pColMatchColInfo;
   pOperator->name = "GroupSortOperator";
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_GROUP_SORT;
-  pOperator->blocking = true;
+  pOperator->blocking = false;
   pOperator->status = OP_NOT_OPENED;
   pOperator->info = pInfo;
   pOperator->exprSupp.pExprInfo = pExprInfo;
diff --git a/source/libs/executor/src/timewindowoperator.c b/source/libs/executor/src/timewindowoperator.c
index f365be906c..1a56eacda8 100644
--- a/source/libs/executor/src/timewindowoperator.c
+++ b/source/libs/executor/src/timewindowoperator.c
@@ -4117,6 +4117,8 @@ SOperatorInfo* createMergeIntervalOperatorInfo(SOperatorInfo* downstream, SExprI
     goto _error;
   }
 
+  miaInfo->groupIntervalHash = taosHashInit(128, taosGetDefaultHashFunction(TSDB_DATA_TYPE_UBIGINT), true, HASH_NO_LOCK);
+
   SIntervalAggOperatorInfo* iaInfo = &miaInfo->intervalAggOperatorInfo;
 
   iaInfo->win = pTaskInfo->window;
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index 7fffa84e0b..838071dbf1 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -613,7 +613,9 @@ int32_t udfdOpenClientRpc() {
 }
 
 int32_t udfdCloseClientRpc() {
+  fnInfo("udfd begin closing rpc");
   rpcClose(global.clientRpc);
+  fnInfo("udfd finish closing rpc");
   return 0;
 }
 
@@ -937,9 +939,8 @@ int main(int argc, char *argv[]) {
   uv_thread_create(&mnodeConnectThread, udfdConnectMnodeThreadFunc, NULL);
 
   udfdRun();
-
+  
   removeListeningPipe();
-  uv_thread_join(&mnodeConnectThread);
   udfdCloseClientRpc();
 
   return 0;