diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index a45db94b492079b184fa5947c427df63300162b5..14f0fa07caab1daac854cc9372fedc88e161ee12 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -172,7 +172,7 @@ static void syncConnCallback(void *param, TAOS_RES *tres, int code) {
 }
 
 TAOS *taos_connect(const char *ip, const char *user, const char *pass, const char *db, uint16_t port) {
-  tscTrace("try to create a connection to %s", ip);
+  tscTrace("try to create a connection to %s:%u, user:%s db:%s", ip, port, user, db);
 
   STscObj *pObj = taosConnectImpl(ip, user, pass, db, port, NULL, NULL, NULL);
   if (pObj != NULL) {
@@ -191,7 +191,7 @@ TAOS *taos_connect(const char *ip, const char *user, const char *pass, const cha
       return NULL;
     }
     
-    tscTrace("%p DB connection is opening", pObj);
+    tscTrace("%p DB connection is opening, dnodeConn:%p", pObj, pObj->pDnodeConn);
     
     // version compare only requires the first 3 segments of the version string
     int code = taosCheckVersion(version, taos_get_server_info(pObj), 3);
diff --git a/src/client/src/tscSystem.c b/src/client/src/tscSystem.c
index d713a9ee5fa9cd9b223ae9e787c033352083730e..07926306db9c3fff2851ec453108429a83eaea41 100644
--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -69,6 +69,8 @@ int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn) {
     if (*pDnodeConn == NULL) {
       tscError("failed to init connection to TDengine");
       return -1;
+    } else {
+      tscTrace("dnodeConn:%p is created, user:%s", *pDnodeConn, user);
     }
   }
 
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index ccb363d9e823f0d119e84e5791092e8e276c6c7d..dd3cb76cbf40876718786dae14dbb5a7b263d8c7 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -766,7 +766,7 @@ void tscCloseTscObj(STscObj* pObj) {
     rpcClose(pObj->pDnodeConn);
   }
   
-  tscTrace("%p DB connection is closed", pObj);
+  tscTrace("%p DB connection is closed, dnodeConn:%p", pObj, pObj->pDnodeConn);
   tfree(pObj);
 }
 
diff --git a/src/dnode/src/dnodePeer.c b/src/dnode/src/dnodePeer.c
index b1e5d9fd38d3a2f6d0ab2f369c57e5218d0d36c4..ea21ed02061ce5aaf52222914b465d7d338229e0 100644
--- a/src/dnode/src/dnodePeer.c
+++ b/src/dnode/src/dnodePeer.c
@@ -61,7 +61,7 @@ int32_t dnodeInitServer() {
   rpcInit.cfp          = dnodeProcessReqMsgFromDnode;
   rpcInit.sessions     = 100;
   rpcInit.connType     = TAOS_CONN_SERVER;
-  rpcInit.idleTime     = tsShellActivityTimer * 2000;
+  rpcInit.idleTime     = tsShellActivityTimer * 1000;
 
   tsDnodeServerRpc = rpcOpen(&rpcInit);
   if (tsDnodeServerRpc == NULL) {
@@ -122,7 +122,7 @@ int32_t dnodeInitClient() {
   rpcInit.ufp          = dnodeUpdateIpSet;
   rpcInit.sessions     = 100;
   rpcInit.connType     = TAOS_CONN_CLIENT;
-  rpcInit.idleTime     = tsShellActivityTimer * 2000;
+  rpcInit.idleTime     = tsShellActivityTimer * 1000;
   rpcInit.user         = "t";
   rpcInit.ckey         = "key";
   rpcInit.secret       = "secret";
diff --git a/src/dnode/src/dnodeShell.c b/src/dnode/src/dnodeShell.c
index cf6b5e38abda31202ad73d3f635b743d3ba33eec..28679262faa7d38eebf8c49317b5df272ae2625e 100644
--- a/src/dnode/src/dnodeShell.c
+++ b/src/dnode/src/dnodeShell.c
@@ -86,7 +86,7 @@ int32_t dnodeInitShell() {
   rpcInit.cfp          = dnodeProcessMsgFromShell;
   rpcInit.sessions     = TSDB_SESSIONS_PER_DNODE;
   rpcInit.connType     = TAOS_CONN_SERVER;
-  rpcInit.idleTime     = tsShellActivityTimer * 1500;
+  rpcInit.idleTime     = tsShellActivityTimer * 1000;
   rpcInit.afp          = dnodeRetrieveUserAuthInfo;
 
   tsDnodeShellRpc = rpcOpen(&rpcInit);
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index 685b0f2b8644c500035db28b4b69547994be066d..f5244545fc9f36bd70f971e21720590d6440d0d6 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -793,7 +793,7 @@ static SRpcConn *rpcProcessMsgHead(SRpcInfo *pRpc, SRecvInfo *pRecv) {
 
   pConn->chandle = pRecv->chandle;
   pConn->peerIp = pRecv->ip; 
-  if (pConn->peerPort == 0) pConn->peerPort = pRecv->port;
+  pConn->peerPort = pRecv->port;
   if (pHead->port) pConn->peerPort = htons(pHead->port); 
 
   terrno = rpcCheckAuthentication(pConn, (char *)pHead, pRecv->msgLen);
diff --git a/tests/script/general/user/pass_alter.sim b/tests/script/general/user/pass_alter.sim
index 034e704a8780e37bab3b29f3b313e2b19db5e8d2..857d658db1ee7f1b91220106983ebb95c9b687d6 100644
--- a/tests/script/general/user/pass_alter.sim
+++ b/tests/script/general/user/pass_alter.sim
@@ -19,28 +19,47 @@ endi
 
 print ============= step2
 sql close
+sleep 2500
+print user read login
 sql connect read
-sleep 2000
 sql alter user read pass 'taosdata'
 sql alter user write pass 'taosdata1' -x step2
   return -1
 step2:
 
+sql_error create user read pass 'taosdata1'
+sql_error create user write pass 'taosdata1'
+
+sql show users
+if $rows != 5 then 
+  return -1
+endi
 
 print ============= step3
 sql close
+sleep 2500
+print user write login
 sql connect write
-sleep 2000
+
+sql_error create user read pass 'taosdata1'
+sql_error create user write pass 'taosdata1'
 sql alter user write pass 'taosdata'
 sql alter user read pass 'taosdata' -x step3
   return -1
 step3:
 
+sql show users
+if $rows != 5 then 
+  return -1
+endi
+
 print ============= step4
 sql close 
+sleep 2500
+print root write login
 sql connect
-sleep 2000
 sql create user oroot pass 'taosdata'
+
 sql show users
 if $rows != 6 then 
   return -1