From f091d8f5e60a86a45f039312440d13916aaa4bc6 Mon Sep 17 00:00:00 2001
From: Jeff Tao <jhtao@taosdata.com>
Date: Thu, 2 Apr 2020 08:28:15 +0800
Subject: [PATCH] connection is cache has already been released because of the
 broken link

---
 src/rpc/src/rpcMain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 21ce7ee60b..3e83293a2f 100755
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -658,7 +658,7 @@ static SRpcConn *rpcSetupConnToServer(SRpcReqContext *pContext) {
   SRpcIpSet  *pIpSet = &pContext->ipSet;
 
   pConn = rpcGetConnFromCache(pRpc->pCache, pIpSet->ip[pIpSet->inUse], pIpSet->port, pContext->connType);
-  if ( pConn == NULL ) {
+  if ( pConn == NULL || pConn->user[0] == 0) {
     char ipstr[20] = {0};
     tinet_ntoa(ipstr, pIpSet->ip[pIpSet->inUse]);
     pConn = rpcOpenConn(pRpc, ipstr, pIpSet->port, pContext->connType);