diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 2b2fcb557f..f2d844f73d 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -26,6 +26,7 @@ typedef struct SCliConn {
   queue        conn;
   char         spi;
   char         secured;
+  uint64_t     expireTime;
 } SCliConn;
 
 typedef struct SCliMsg {
@@ -39,10 +40,13 @@ typedef struct SCliThrdObj {
   pthread_t       thread;
   uv_loop_t*      loop;
   uv_async_t*     cliAsync;  //
-  void*           cache;     // conn pool
+  uv_timer_t*     pTimer;
+  void*           cache;  // conn pool
   queue           msg;
   pthread_mutex_t msgMtx;
-  void*           shandle;
+  uint64_t        nextTimeout;  // next timeout
+  void*           shandle;      //
+
 } SCliThrdObj;
 
 typedef struct SClientObj {
@@ -63,6 +67,8 @@ static void*     connCacheDestroy(void* cache);
 static SCliConn* getConnFromCache(void* cache, char* ip, uint32_t port);
 static void      addConnToCache(void* cache, char* ip, uint32_t port, SCliConn* conn);
 
+// register timer in each thread to clear expire conn
+static void clientTimeoutCb(uv_timer_t* handle);
 // process data read from server, auth/decompress etc
 static void clientProcessData(SCliConn* conn);
 // check whether already read complete packet from server
@@ -84,21 +90,55 @@ static void clientMsgDestroy(SCliMsg* pMsg);
 static void* clientThread(void* arg);
 
 static void clientProcessData(SCliConn* conn) {
+  STransConnCtx* pCtx = ((SCliMsg*)conn->data)->ctx;
+  SRpcInfo*      pRpc = pCtx->ahandle;
+  SRpcMsg        rpcMsg;
+
+  rpcMsg.pCont = conn->readBuf.buf;
+  rpcMsg.contLen = conn->readBuf.len;
+  rpcMsg.ahandle = pCtx->ahandle;
+  (pRpc->cfp)(NULL, &rpcMsg, NULL);
   // impl
 }
 static void clientHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd);
 
+static void clientTimeoutCb(uv_timer_t* handle) {
+  SCliThrdObj* pThrd = handle->data;
+  SRpcInfo*    pRpc = pThrd->shandle;
+  int64_t      currentTime = pThrd->nextTimeout;
+
+  SConnList* p = taosHashIterate((SHashObj*)pThrd->cache, NULL);
+  while (p != NULL) {
+    while (!QUEUE_IS_EMPTY(&p->conn)) {
+      queue*    h = QUEUE_HEAD(&p->conn);
+      SCliConn* c = QUEUE_DATA(h, SCliConn, conn);
+      if (c->expireTime < currentTime) {
+        QUEUE_REMOVE(h);
+        clientConnDestroy(c);
+      } else {
+        break;
+      }
+    }
+    p = taosHashIterate((SHashObj*)pThrd->cache, p);
+  }
+
+  pThrd->nextTimeout = taosGetTimestampMs() + pRpc->idleTime * 1000 * 10;
+  uv_timer_start(handle, clientTimeoutCb, pRpc->idleTime * 10, 0);
+}
 static void* connCacheCreate(int size) {
   SHashObj* cache = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_NO_LOCK);
   return false;
 }
 static void* connCacheDestroy(void* cache) {
   SConnList* connList = taosHashIterate((SHashObj*)cache, NULL);
-  while (!QUEUE_IS_EMPTY(&connList->conn)) {
-    queue* h = QUEUE_HEAD(&connList->conn);
-    QUEUE_REMOVE(h);
-    SCliConn* c = QUEUE_DATA(h, SCliConn, conn);
-    clientConnDestroy(c);
+  while (connList != NULL) {
+    while (!QUEUE_IS_EMPTY(&connList->conn)) {
+      queue* h = QUEUE_HEAD(&connList->conn);
+      QUEUE_REMOVE(h);
+      SCliConn* c = QUEUE_DATA(h, SCliConn, conn);
+      clientConnDestroy(c);
+    }
+    connList = taosHashIterate((SHashObj*)cache, connList);
   }
   taosHashClear(cache);
 }
@@ -129,8 +169,10 @@ static void addConnToCache(void* cache, char* ip, uint32_t port, SCliConn* conn)
   tstrncpy(key, ip, strlen(ip));
   tstrncpy(key + strlen(key), (char*)(&port), sizeof(port));
 
-  SHashObj*  pCache = cache;
-  SConnList* plist = taosHashGet(pCache, key, strlen(key));
+  STransConnCtx* ctx = ((SCliMsg*)conn->data)->ctx;
+  SRpcInfo*      pRpc = ctx->pRpc;
+  conn->expireTime = taosGetTimestampMs() + pRpc->idleTime * 1000 * 10;
+  SConnList* plist = taosHashGet((SHashObj*)cache, key, strlen(key));
   // list already create before
   assert(plist != NULL);
   QUEUE_PUSH(&plist->conn, &conn->conn);
@@ -206,6 +248,7 @@ static void clientConnDestroy(SCliConn* conn) {
 }
 static void clientDestroy(uv_handle_t* handle) {
   SCliConn* conn = handle->data;
+  QUEUE_REMOVE(&conn->conn);
   clientConnDestroy(conn);
 }
 
@@ -279,6 +322,7 @@ static void clientHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd) {
     conn->stream = (uv_stream_t*)malloc(sizeof(uv_tcp_t));
     uv_tcp_init(pThrd->loop, (uv_tcp_t*)(conn->stream));
     conn->writeReq = malloc(sizeof(uv_write_t));
+    QUEUE_INIT(&conn->conn);
 
     conn->connReq.data = conn;
     conn->data = pMsg;
@@ -315,6 +359,9 @@ static void clientAsyncCb(uv_async_t* handle) {
 
 static void* clientThread(void* arg) {
   SCliThrdObj* pThrd = (SCliThrdObj*)arg;
+  SRpcInfo*    pRpc = pThrd->shandle;
+  pThrd->nextTimeout = taosGetTimestampMs() + pRpc->idleTime * 1000 * 10;
+  uv_timer_start(pThrd->pTimer, clientTimeoutCb, pRpc->idleTime * 10, 0);
   uv_run(pThrd->loop, UV_RUN_DEFAULT);
 }
 
@@ -336,7 +383,11 @@ void* taosInitClient(uint32_t ip, uint32_t port, char* label, int numOfThreads,
     uv_async_init(pThrd->loop, pThrd->cliAsync, clientAsyncCb);
     pThrd->cliAsync->data = pThrd;
 
+    pThrd->pTimer = malloc(sizeof(uv_timer_t));
+    uv_timer_init(pThrd->loop, pThrd->pTimer);
+
     pThrd->shandle = shandle;
+
     int err = pthread_create(&pThrd->thread, NULL, clientThread, (void*)(pThrd));
     if (err == 0) {
       tDebug("sucess to create tranport-client thread %d", i);