fix: limit session num

source/libs/transport/src/transCli.c

@@ -143,7 +143,7 @@ typedef struct {
 // add expire timeout and capacity limit
 static void*     createConnPool(int size);
 static void*     destroyConnPool(void* pool);
-static SCliConn* getConnFromPool(SCliThrd* thread, char* key);
+static SCliConn* getConnFromPool(SCliThrd* thread, char* key, bool* exceed);
 static void      addConnToPool(void* pool, SCliConn* conn);
 static void      doCloseIdleConn(void* param);
 
@@ -577,7 +577,7 @@ void* destroyConnPool(void* pool) {
   return NULL;
 }
 
-static SCliConn* getConnFromPool(SCliThrd* pThrd, char* key) {
+static SCliConn* getConnFromPool(SCliThrd* pThrd, char* key, bool* exceed) {
   void*      pool = pThrd->pool;
   SConnList* plist = taosHashGet((SHashObj*)pool, key, strlen(key));
   STrans*    pTranInst = pThrd->pTransInst;
@@ -591,11 +591,12 @@ static SCliConn* getConnFromPool(SCliThrd* pThrd, char* key) {
     list.list = nList;
 
     taosHashPut((SHashObj*)pool, key, strlen(key), (void*)&list, sizeof(list));
-    plist = taosHashGet((SHashObj*)pool, key, strlen(key));
+    return NULL;
   }
 
   SMsgList* msglist = plist->list;
   if (QUEUE_IS_EMPTY(&plist->conns) && msglist->numOfConn >= pTranInst->connLimitNum) {
+    *exceed = true;
     return NULL;
   }
 
@@ -1131,11 +1132,12 @@ static void cliHandleBatchReq(SCliBatch* pBatch, SCliThrd* pThrd) {
   char key[TSDB_FQDN_LEN + 64] = {0};
   CONN_CONSTRUCT_HASH_KEY(key, pList->ip, pList->port);
 
-  SCliConn* conn = getConnFromPool(pThrd, key);
+  bool      exceed = false;
+  SCliConn* conn = getConnFromPool(pThrd, key, &exceed);
 
-  if (conn == NULL) {
-    tError("%s failed to send batch msg, batch size:%d, msgLen: %d", pTransInst->label, pBatch->wLen,
-           pBatch->batchSize);
+  if (conn == NULL && exceed) {
+    tError("%s failed to send batch msg, batch size:%d, msgLen: %d, conn limit:%d", pTransInst->label, pBatch->wLen,
+           pBatch->batchSize, pTransInst->connLimitNum);
     cliDestroyBatch(pBatch);
     return;
   }
@@ -1471,12 +1473,10 @@ static void doFreeTimeoutMsg(void* param) {
   taosMemoryFree(arg);
 }
 void cliHandleReq(SCliMsg* pMsg, SCliThrd* pThrd) {
-  STrans*   pTransInst = pThrd->pTransInst;
-  STraceId* trace = &pMsg->msg.info.traceId;
+  STrans* pTransInst = pThrd->pTransInst;
 
   cliMayCvtFqdnToIp(&pMsg->ctx->epSet, &pThrd->cvtAddr);
   if (!EPSET_IS_VALID(&pMsg->ctx->epSet)) {
-    tGError("%s, msg %s sent with invalid epset", pTransInst->label, TMSG_INFO(pMsg->msg.msgType));
     destroyCmsg(pMsg);
     return;
   }
@@ -1501,6 +1501,7 @@ void cliHandleReq(SCliMsg* pMsg, SCliThrd* pThrd) {
   if (conn == NULL && pMsg == NULL) {
     return;
   }
+  STraceId* trace = &pMsg->msg.info.traceId;
 
   if (conn != NULL) {
     transCtxMerge(&conn->ctx, &pMsg->ctx->appCtx);