[TD-230] fix memory links

src/mnode/src/mgmtShell.c

@@ -108,7 +108,6 @@ void mgmtCleanUpShell() {
   }
 
   if (tsQhandleCache) {
-    taosCacheEmpty(tsQhandleCache);
     taosCacheCleanup(tsQhandleCache);
     tsQhandleCache = NULL;
   }

src/plugins/http/src/httpSystem.c

@@ -117,7 +117,7 @@ void httpCleanUpSystem() {
   httpPrint("http service cleanup");
   httpStopSystem();
 
-#if 0
+//#if 0
   if (httpServer == NULL) {
     return;
   }
@@ -132,6 +132,8 @@ void httpCleanUpSystem() {
   }
 
   httpCleanUpConnect(httpServer);
+
+#if 0
   httpRemoveAllSessions(httpServer);
 
   if (httpServer->pContextPool != NULL) {

src/util/src/tcache.c

@@ -304,9 +304,9 @@ static FORCE_INLINE SCacheDataNode *taosAddToCacheImpl(SCacheObj *pCacheObj, con
 static void doCleanupDataCache(SCacheObj *pCacheObj) {
   __cache_wr_lock(pCacheObj);
   
-  if (taosHashGetSize(pCacheObj->pHashTable) > 0) {
+  //if (taosHashGetSize(pCacheObj->pHashTable) > 0) {
   taosHashCleanup(pCacheObj->pHashTable);
-  }
+  //}
   
   __cache_unlock(pCacheObj);