fix: send rpc response on closing sync or failing to enqueue

source/dnode/mgmt/mgmt_vnode/src/vmWorker.c

@@ -134,6 +134,13 @@ static void vmProcessSyncQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOf
   }
 }
 
+static void vmSendResponse(SRpcMsg *pMsg) {
+  if (pMsg->info.handle) {
+    SRpcMsg rsp = {.info = pMsg->info, .code = terrno};
+    rpcSendResponse(&rsp);
+  }
+}
+
 static int32_t vmPutMsgToQueue(SVnodeMgmt *pMgmt, SRpcMsg *pMsg, EQueueType qtype) {
   const STraceId *trace = &pMsg->info.traceId;
   if (pMsg->contLen < sizeof(SMsgHead)) {
@@ -152,7 +159,9 @@ static int32_t vmPutMsgToQueue(SVnodeMgmt *pMgmt, SRpcMsg *pMsg, EQueueType qtyp
   if (pVnode == NULL) {
     dGError("vgId:%d, msg:%p failed to put into vnode queue since %s, type:%s qtype:%d contLen:%d", pHead->vgId, pMsg,
             terrstr(), TMSG_INFO(pMsg->msgType), qtype, pHead->contLen);
-    return terrno != 0 ? terrno : -1;
+    terrno = (terrno != 0) ? terrno : -1;
+    vmSendResponse(pMsg);
+    return terrno;
   }
 
   switch (qtype) {

source/dnode/vnode/src/vnd/vnodeSvr.c

@@ -182,7 +182,6 @@ int32_t vnodeProcessWriteMsg(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRp
     vError("vgId:%d, duplicate write request. version: %" PRId64 ", applied: %" PRId64 "", TD_VID(pVnode), version,
            pVnode->state.applied);
     terrno = TSDB_CODE_VND_DUP_REQUEST;
-    pRsp->info.handle = NULL;
     return -1;
   }
 

source/libs/sync/src/syncMain.c

@@ -1252,6 +1252,9 @@ void syncNodePreClose(SSyncNode* pSyncNode) {
 
   // stop heartbeat timer
   syncNodeStopHeartbeatTimer(pSyncNode);
+
+  // clean rsp
+  syncRespCleanRsp(pSyncNode->pSyncRespMgr);
 }
 
 void syncHbTimerDataFree(SSyncHbTimerData* pData) { taosMemoryFree(pData); }
@@ -2667,16 +2670,12 @@ int32_t syncNodeOnClientRequest(SSyncNode* ths, SRpcMsg* pMsg, SyncIndex* pRetIn
     }
 
     int32_t code = syncNodeAppend(ths, pEntry);
-    if (code < 0) {
-      sNError(ths, "failed to append blocking msg");
-    }
     return code;
   } else {
     syncEntryDestroy(pEntry);
     pEntry = NULL;
+    return -1;
   }
-
-  return -1;
 }
 
 int32_t syncNodeOnClientRequestOld(SSyncNode* ths, SRpcMsg* pMsg, SyncIndex* pRetIndex) {