diff --git a/src/mnode/src/mnodeProfile.c b/src/mnode/src/mnodeProfile.c
index b57521e759ecd6d8a96a0567d80b897cbf5ec28f..7552ea5c25c136106ff998201500d299949d5932 100644
--- a/src/mnode/src/mnodeProfile.c
+++ b/src/mnode/src/mnodeProfile.c
@@ -138,7 +138,7 @@ SConnObj *mnodeAccquireConn(uint32_t connId, char *user, uint32_t ip, uint16_t p
 static void mnodeFreeConn(void *data) {
   SConnObj *pConn = data;
   tfree(pConn->pQueries);
-  tfree(pConn->pQueries);
+  tfree(pConn->pStreams);
 
   mTrace("connId:%d, is destroyed", pConn->connId);
 }
diff --git a/src/plugins/http/inc/httpContext.h b/src/plugins/http/inc/httpContext.h
index 27b732bf3eb20cd6bbf3992cb5bd9cef45de73cd..a2d50d6b7fdfba3bc80c918abd7999247636b6ee 100644
--- a/src/plugins/http/inc/httpContext.h
+++ b/src/plugins/http/inc/httpContext.h
@@ -24,7 +24,7 @@ const char *httpContextStateStr(HttpContextState state);
 
 HttpContext *httpCreateContext(int32_t fd);
 bool         httpInitContext(HttpContext *pContext);
-HttpContext *httpGetContext(int32_t fd);
+HttpContext *httpGetContext(void * pContext);
 void         httpReleaseContext(HttpContext *pContext);
 void         httpCloseContextByServer(HttpContext *pContext);
 void         httpCloseContextByApp(HttpContext *pContext);
diff --git a/src/plugins/http/src/httpContext.c b/src/plugins/http/src/httpContext.c
index 9262e3f609f292a3e5368728795f53fdadc3b60f..183a332fb609cc896368ab61bcbce1109cbc3685 100644
--- a/src/plugins/http/src/httpContext.c
+++ b/src/plugins/http/src/httpContext.c
@@ -22,6 +22,7 @@
 #include "ttimer.h"
 #include "tglobal.h"
 #include "tcache.h"
+#include "hash.h"
 #include "httpInt.h"
 #include "httpResp.h"
 #include "httpSql.h"
@@ -38,15 +39,13 @@ static void httpRemoveContextFromEpoll(HttpContext *pContext) {
 
 static void httpDestroyContext(void *data) {
   HttpContext *pContext = *(HttpContext **)data;
-  httpTrace("context:%p, is destroyed, refCount:%d", pContext, pContext->refCount);
-  
   if (pContext->fd > 0) tclose(pContext->fd);
 
   HttpThread *pThread = pContext->pThread;
   httpRemoveContextFromEpoll(pContext);
   httpReleaseSession(pContext);
   atomic_sub_fetch_32(&pThread->numOfFds, 1);
-
+  
   pContext->pThread = 0;
   pContext->state = HTTP_CONTEXT_STATE_CLOSED;
 
@@ -54,11 +53,12 @@ static void httpDestroyContext(void *data) {
   httpFreeJsonBuf(pContext);
   httpFreeMultiCmds(pContext);
   
+  httpTrace("context:%p, is destroyed, refCount:%d", pContext, pContext->refCount);
   tfree(pContext);
 }
 
 bool httpInitContexts() {
-  tsHttpServer.contextCache = taosCacheInitWithCb(5, httpDestroyContext);
+  tsHttpServer.contextCache = taosCacheInitWithCb(2, httpDestroyContext);
   if (tsHttpServer.contextCache == NULL) {
     httpError("failed to init context cache");
     return false;
@@ -70,7 +70,8 @@ bool httpInitContexts() {
 void httpCleanupContexts() {
   // TODO: wait until all context is closed
   if (tsHttpServer.contextCache != NULL) {
-    httpPrint("context cache is cleanup");
+    SCacheObj *cache = tsHttpServer.contextCache;
+    httpPrint("context cache is cleanuping, size:%d", taosHashGetSize(cache->pHashTable));
     taosCacheCleanup(tsHttpServer.contextCache);
     tsHttpServer.contextCache = NULL;
   }
@@ -103,26 +104,29 @@ HttpContext *httpCreateContext(int32_t fd) {
   HttpContext *pContext = calloc(1, sizeof(HttpContext));
   if (pContext == NULL) return NULL;
 
-  char fdStr[12] = {0};
-  snprintf(fdStr, sizeof(fdStr), "%d", fd);
+  char contextStr[16] = {0};
+  snprintf(contextStr, sizeof(contextStr), "%p", pContext);
   
   pContext->fd = fd;
   pContext->httpVersion = HTTP_VERSION_10;
   pContext->lastAccessTime = taosGetTimestampSec();
   pContext->state = HTTP_CONTEXT_STATE_READY;
   
-  HttpContext **ppContext = taosCachePut(tsHttpServer.contextCache, fdStr, &pContext, sizeof(HttpContext *), 5);
+  HttpContext **ppContext = taosCachePut(tsHttpServer.contextCache, contextStr, &pContext, sizeof(HttpContext *), 3);
   pContext->ppContext = ppContext;
-  httpTrace("context:%p, fd:%d, is created", pContext, fd);
+  httpTrace("context:%p, fd:%d, is created, item:%p", pContext, fd, ppContext);
+
+  // set the ref to 0 
+  taosCacheRelease(tsHttpServer.contextCache, (void**)&ppContext, false);
 
   return pContext;
 }
 
-HttpContext *httpGetContext(int32_t fd) {
-  char fdStr[12] = {0};
-  snprintf(fdStr, sizeof(fdStr), "%d", fd);
+HttpContext *httpGetContext(void *ptr) {
+  char contextStr[16] = {0};
+  snprintf(contextStr, sizeof(contextStr), "%p", ptr);
   
-  HttpContext **ppContext = taosCacheAcquireByName(tsHttpServer.contextCache, fdStr);
+  HttpContext **ppContext = taosCacheAcquireByName(tsHttpServer.contextCache, contextStr);
   
   if (ppContext) {
     HttpContext *pContext = *ppContext;
diff --git a/src/plugins/http/src/httpServer.c b/src/plugins/http/src/httpServer.c
index 06523540b7ed4716c33c13150cfe5b94141c6cf3..bea2bb083ace72bbaffc191d7d498c09ba967ffd 100644
--- a/src/plugins/http/src/httpServer.c
+++ b/src/plugins/http/src/httpServer.c
@@ -193,7 +193,7 @@ static void httpProcessHttpData(void *param) {
     if (fdNum <= 0) continue;
 
     for (int i = 0; i < fdNum; ++i) {
-      pContext = httpGetContext(events[i].data.fd);
+      pContext = httpGetContext(events[i].data.ptr);
       if (pContext == NULL) {
         httpError("fd:%d, is already released, close connect", events[i].data.fd);
         epoll_ctl(pThread->pollFd, EPOLL_CTL_DEL, pContext->fd, NULL);
@@ -319,7 +319,7 @@ static void *httpAcceptHttpConnection(void *arg) {
     
     struct epoll_event event;
     event.events = EPOLLIN | EPOLLPRI | EPOLLWAKEUP | EPOLLERR | EPOLLHUP | EPOLLRDHUP;
-    event.data.fd = connFd;
+    event.data.ptr = pContext;
     if (epoll_ctl(pThread->pollFd, EPOLL_CTL_ADD, connFd, &event) < 0) {
       httpError("context:%p, fd:%d, ip:%s, thread:%s, failed to add http fd for epoll, error:%s", pContext, connFd,
                 pContext->ipstr, pThread->label, strerror(errno));
diff --git a/src/plugins/http/src/httpSession.c b/src/plugins/http/src/httpSession.c
index af8a3e60023b7cab6548739160e538d244d22fe4..2b0735bfaf58c834d912942847e429bd828a4a33 100644
--- a/src/plugins/http/src/httpSession.c
+++ b/src/plugins/http/src/httpSession.c
@@ -35,6 +35,8 @@ void httpCreateSession(HttpContext *pContext, void *taos) {
   snprintf(session.id, HTTP_SESSION_ID_LEN, "%s.%s", pContext->user, pContext->pass);
 
   pContext->session = taosCachePut(server->sessionCache, session.id, &session, sizeof(HttpSession), tsHttpSessionExpire);
+  // void *temp = pContext->session;
+  // taosCacheRelease(server->sessionCache, (void **)&temp, false);
 
   if (pContext->session == NULL) {
     httpError("context:%p, fd:%d, ip:%s, user:%s, error:%s", pContext, pContext->fd, pContext->ipstr, pContext->user,
@@ -44,7 +46,7 @@ void httpCreateSession(HttpContext *pContext, void *taos) {
     return;
   }
 
-  httpTrace("context:%p, fd:%d, ip:%s, user:%s, create a new session:%p:%p refCount:%d", pContext, pContext->fd,
+  httpTrace("context:%p, fd:%d, ip:%s, user:%s, create a new session:%p:%p sessionRef:%d", pContext, pContext->fd,
             pContext->ipstr, pContext->user, pContext->session, pContext->session->taos, pContext->session->refCount);
   pthread_mutex_unlock(&server->serverMutex);
 }
@@ -59,7 +61,7 @@ static void httpFetchSessionImp(HttpContext *pContext) {
   pContext->session = taosCacheAcquireByName(server->sessionCache, sessionId);
   if (pContext->session != NULL) {
     atomic_add_fetch_32(&pContext->session->refCount, 1);
-    httpTrace("context:%p, fd:%d, ip:%s, user:%s, find an exist session:%p:%p, refCount:%d", pContext, pContext->fd,
+    httpTrace("context:%p, fd:%d, ip:%s, user:%s, find an exist session:%p:%p, sessionRef:%d", pContext, pContext->fd,
               pContext->ipstr, pContext->user, pContext->session, pContext->session->taos, pContext->session->refCount);
   } else {
     httpTrace("context:%p, fd:%d, ip:%s, user:%s, session not found", pContext, pContext->fd, pContext->ipstr,
@@ -85,26 +87,27 @@ void httpReleaseSession(HttpContext *pContext) {
 
   int32_t refCount = atomic_sub_fetch_32(&pContext->session->refCount, 1);
   assert(refCount >= 0);
-  httpTrace("context:%p, session:%p is releasd refCount:%d", pContext, pContext->session, pContext->session->refCount);
+  httpTrace("context:%p, release session:%p:%p, sessionRef:%d", pContext, pContext->session, pContext->session->taos,
+            pContext->session->refCount);
 
-  taosCacheRelease(tsHttpServer.sessionCache, (void**)(&(pContext->session)), false);
+  taosCacheRelease(tsHttpServer.sessionCache, (void **)&pContext->session, false);
   pContext->session = NULL;
 }
 
 static void httpDestroySession(void *data) {
-  HttpSession *pSession = data;
-  httpTrace("session:%p:%p, is destroyed, refCount:%d", pSession, pSession->taos, pSession->refCount);
+  HttpSession *session = data;
+  httpTrace("session:%p:%p, is destroyed, sessionRef:%d", session, session->taos, session->refCount);
 
-  if (pSession->taos != NULL) {
-    taos_close(pSession->taos);
-    pSession->taos = NULL;
+  if (session->taos != NULL) {
+    taos_close(session->taos);
+    session->taos = NULL;
   }
-  tfree(pSession);
 }
 
 void httpCleanUpSessions() {
   if (tsHttpServer.sessionCache != NULL) {
-    httpPrint("session cache is cleanup");
+    SCacheObj *cache = tsHttpServer.sessionCache;
+    httpPrint("session cache is cleanuping, size:%d", taosHashGetSize(cache->pHashTable));
     taosCacheCleanup(tsHttpServer.sessionCache);
     tsHttpServer.sessionCache = NULL;
   }
diff --git a/src/plugins/http/src/httpSystem.c b/src/plugins/http/src/httpSystem.c
index 6e21baca04bc4320d5dbc7ad9909550701e13979..015b0783b739a36eff88a398ce449eaff5771940 100644
--- a/src/plugins/http/src/httpSystem.c
+++ b/src/plugins/http/src/httpSystem.c
@@ -92,7 +92,7 @@ void httpStopSystem() {
 }
 
 void httpCleanUpSystem() {
-  httpPrint("http service cleanup");
+  httpPrint("http server cleanup");
   httpStopSystem();
 
   httpCleanupContexts();
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index ac06cf4f3f8b4c7355904ec9da1495bb0d9beeca..2b6083a91ccef8ef2a08902117e8f67340ba6a37 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -63,10 +63,12 @@ static FORCE_INLINE void __cache_lock_destroy(SCacheObj *pCacheObj) {
 #endif
 }
 
+#if 0
 static FORCE_INLINE void taosFreeNode(void *data) {
   SCacheDataNode *pNode = *(SCacheDataNode **)data;
   free(pNode);
 }
+#endif
 
 /**
  * @param key      key of object for hash, usually a null-terminated string
@@ -241,7 +243,7 @@ SCacheObj *taosCacheInitWithCb(int64_t refreshTime, void (*freeCb)(void *data))
   }
   
   // set free cache node callback function for hash table
-  taosHashSetFreecb(pCacheObj->pHashTable, taosFreeNode);
+  // taosHashSetFreecb(pCacheObj->pHashTable, taosFreeNode);
   
   pCacheObj->freeFp = freeCb;
   pCacheObj->refreshTime = refreshTime * 1000;
@@ -565,7 +567,17 @@ void taosTrashCanEmpty(SCacheObj *pCacheObj, bool force) {
 
 void doCleanupDataCache(SCacheObj *pCacheObj) {
   __cache_wr_lock(pCacheObj);
-  taosHashCleanup(pCacheObj->pHashTable);
+
+  SHashMutableIterator *pIter = taosHashCreateIter(pCacheObj->pHashTable);
+  while (taosHashIterNext(pIter)) {
+    SCacheDataNode *pNode = *(SCacheDataNode **)taosHashIterGet(pIter);
+    // if (pNode->expiredTime <= expiredTime && T_REF_VAL_GET(pNode) <= 0) {
+    taosCacheReleaseNode(pCacheObj, pNode);
+    //}
+  }
+  taosHashDestroyIter(pIter);
+
+  taosHashCleanup(pCacheObj->pHashTable); 
   __cache_unlock(pCacheObj);
 
   taosTrashCanEmpty(pCacheObj, true);