diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 73cb2f7e27..a6bb249bc3 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -892,6 +892,9 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   TAOS_CHECK_RETURN(cfgAddInt32(pCfg, "cacheLazyLoadThreshold", tsCacheLazyLoadThreshold, 0, 100000, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER,CFG_CATEGORY_GLOBAL));
 
   TAOS_CHECK_RETURN(cfgAddFloat(pCfg, "fPrecision", tsFPrecision, 0.0f, 100000.0f, CFG_SCOPE_SERVER, CFG_DYN_NONE,CFG_CATEGORY_GLOBAL));
+  SConfigItem *pItem = NULL;
+  TAOS_CHECK_GET_CFG_ITEM(pCfg, pItem, "fPrecision");
+  tsFPrecision = pItem->fval;
   TAOS_CHECK_RETURN(cfgAddFloat(pCfg, "dPrecision", tsDPrecision, 0.0f, 1000000.0f, CFG_SCOPE_SERVER, CFG_DYN_NONE,CFG_CATEGORY_GLOBAL));
   TAOS_CHECK_RETURN(cfgAddInt32(pCfg, "maxRange", tsMaxRange, 0, 65536, CFG_SCOPE_SERVER, CFG_DYN_SERVER_LAZY,CFG_CATEGORY_GLOBAL));
   TAOS_CHECK_RETURN(cfgAddInt32(pCfg, "curRange", tsCurRange, 0, 65536, CFG_SCOPE_SERVER, CFG_DYN_NONE,CFG_CATEGORY_GLOBAL));
@@ -1998,6 +2001,8 @@ int32_t cfgDeserialize(SArray *array, char *buf, bool isGlobal) {
       }
     }
   }
+_exit:
+  cJSON_Delete(pRoot);
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/dnode/mgmt/mgmt_dnode/src/dmHandle.c b/source/dnode/mgmt/mgmt_dnode/src/dmHandle.c
index c17d3affb3..a856a723c6 100644
--- a/source/dnode/mgmt/mgmt_dnode/src/dmHandle.c
+++ b/source/dnode/mgmt/mgmt_dnode/src/dmHandle.c
@@ -315,6 +315,7 @@ static void dmProcessConfigRsp(SDnodeMgmt *pMgmt, SRpcMsg *pRsp) {
         } else {
           // log the difference configurations
           printConfigNotMatch(configRsp.array);
+          dmStop();
           goto _exit;
         }
       }
diff --git a/source/dnode/mnode/impl/src/mndConfig.c b/source/dnode/mnode/impl/src/mndConfig.c
index 5b21131df2..f7065ddf09 100644
--- a/source/dnode/mnode/impl/src/mndConfig.c
+++ b/source/dnode/mnode/impl/src/mndConfig.c
@@ -387,7 +387,8 @@ int32_t cfgUpdateItem(SConfigItem *pItem, SConfigObj *obj) {
       if (obj->str != NULL) {
         taosMemoryFree(pItem->str);
         pItem->str = taosMemoryMalloc(strlen(obj->str) + 1);
-        tstrncpy(pItem->str, obj->str, strlen(obj->str) + 1);
+        tstrncpy(pItem->str, obj->str, strlen(obj->str));
+        pItem->str[strlen(obj->str)] = 0;
       }
       break;
     }
diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index 029ada0a75..7d82666c65 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -107,32 +107,31 @@ int32_t cfgUpdateFromArray(SConfig *pCfg, SArray *pArgs) {
       (void)taosThreadMutexUnlock(&pCfg->lock);
       TAOS_RETURN(TSDB_CODE_CFG_NOT_FOUND);
     }
-    char value[30];
     switch (pItemNew->dtype) {
       case CFG_DTYPE_BOOL:
-        strncpy(value, pItemNew->bval ? "true" : "false", sizeof(value) - 1);
+        pItemOld->bval = pItemNew->bval;
         break;
       case CFG_DTYPE_INT32:
-        sprintf(value, "%d", pItemNew->i32);
+        pItemOld->i32 = pItemNew->i32;
         break;
       case CFG_DTYPE_INT64:
-        sprintf(value, "%" PRId64, pItemNew->i64);
+        pItemOld->i64 = pItemNew->i64;
         break;
       case CFG_DTYPE_FLOAT:
-        sprintf(value, "%f", pItemNew->fval);
+      case CFG_DTYPE_DOUBLE:
+        pItemOld->fval = pItemNew->fval;
         break;
       case CFG_DTYPE_STRING:
       case CFG_DTYPE_DIR:
       case CFG_DTYPE_LOCALE:
       case CFG_DTYPE_CHARSET:
       case CFG_DTYPE_TIMEZONE:
-        strcpy(value, pItemNew->str);
+        taosMemoryFree(pItemOld->str);
+        pItemOld->str = taosStrdup(pItemNew->str);
+        break;
       default:
         break;
     }
-    value[sizeof(value) - 1] = '\0';
-
-    TAOS_CHECK_RETURN(cfgSetItemVal(pItemOld, pItemNew->name, value, CFG_STYPE_ARG_LIST));
 
     (void)taosThreadMutexUnlock(&pCfg->lock);
   }