diff --git a/include/util/tconfig.h b/include/util/tconfig.h
index dfee25f680..cc4c605ad4 100644
--- a/include/util/tconfig.h
+++ b/include/util/tconfig.h
@@ -54,6 +54,7 @@ typedef enum {
 
 typedef enum { CFG_SCOPE_SERVER, CFG_SCOPE_CLIENT, CFG_SCOPE_BOTH } ECfgScopeType;
 typedef enum { CFG_CATEGORY_GLOBAL, CFG_CATEGORY_LOCAL } ECfgCategoryType;
+typedef enum { CFG_ALTER_LOCAL, CFG_ALTER_DNODE, CFG_ALTER_ALL_DNODES } CfgAlterType;
 
 typedef enum {
   CFG_DYN_NONE = 0,
@@ -123,7 +124,8 @@ SConfigItem *cfgGetItem(SConfig *pCfg, const char *pName);
 int32_t      cfgSetItem(SConfig *pCfg, const char *name, const char *value, ECfgSrcType stype, bool lock);
 int32_t cfgGetAndSetItem(SConfig *pCfg, SConfigItem **ppItem, const char *name, const char *value, ECfgSrcType stype,
                          bool lock);
-int32_t cfgCheckRangeForDynUpdate(SConfig *pCfg, const char *name, const char *pVal, bool isServer, bool isUpdateAll);
+int32_t cfgCheckRangeForDynUpdate(SConfig *pCfg, const char *name, const char *pVal, bool isServer,
+                                  CfgAlterType alterType);
 
 int32_t      cfgCreateIter(SConfig *pConf, SConfigIter **ppIter);
 SConfigItem *cfgNextIter(SConfigIter *pIter);
diff --git a/source/dnode/mnode/impl/src/mndConfig.c b/source/dnode/mnode/impl/src/mndConfig.c
index d9ccd2f5af..cd9a8f7405 100644
--- a/source/dnode/mnode/impl/src/mndConfig.c
+++ b/source/dnode/mnode/impl/src/mndConfig.c
@@ -22,13 +22,9 @@
 #include "mndUser.h"
 #include "tutil.h"
 
-#define CFG_VER_NUMBER   1
-#define CFG_RESERVE_SIZE 63
-
-enum CfgAlterType {
-  CFG_ALTER_DNODE,
-  CFG_ALTER_ALL_DNODES,
-};
+#define CFG_VER_NUMBER    1
+#define CFG_RESERVE_SIZE  63
+#define CFG_ALTER_TIMEOUT 3 * 1000
 
 static int32_t mndMCfgGetValInt32(SMCfgDnodeReq *pInMCfgReq, int32_t optLen, int32_t *pOutValue);
 static int32_t cfgUpdateItem(SConfigItem *pItem, SConfigObj *obj);
@@ -458,29 +454,59 @@ static int32_t mndSendCfgDnodeReq(SMnode *pMnode, int32_t dnodeId, SDCfgDnodeReq
   int32_t code = -1;
   SSdb   *pSdb = pMnode->pSdb;
   void   *pIter = NULL;
+
+  int64_t curMs = taosGetTimestampMs();
+
   while (1) {
     SDnodeObj *pDnode = NULL;
     pIter = sdbFetch(pSdb, SDB_DNODE, pIter, (void **)&pDnode);
     if (pIter == NULL) break;
 
     if (pDnode->id == dnodeId || dnodeId == -1 || dnodeId == 0) {
+      bool online = mndIsDnodeOnline(pDnode, curMs);
+      if (!online) {
+        mWarn("dnode:%d, is offline, skip to send config req", pDnode->id);
+        continue;
+      }
       SEpSet  epSet = mndGetDnodeEpset(pDnode);
       int32_t bufLen = tSerializeSDCfgDnodeReq(NULL, 0, pDcfgReq);
       void   *pBuf = rpcMallocCont(bufLen);
 
-      if (pBuf != NULL) {
-        if ((bufLen = tSerializeSDCfgDnodeReq(pBuf, bufLen, pDcfgReq)) <= 0) {
-          sdbCancelFetch(pMnode->pSdb, pIter);
-          sdbRelease(pMnode->pSdb, pDnode);
-          code = bufLen;
-          return code;
-        }
-        mInfo("dnode:%d, send config req to dnode, config:%s value:%s", dnodeId, pDcfgReq->config, pDcfgReq->value);
-        SRpcMsg rpcMsg = {.msgType = TDMT_DND_CONFIG_DNODE, .pCont = pBuf, .contLen = bufLen};
-        code = tmsgSendReq(&epSet, &rpcMsg);
+      if (pBuf == NULL) {
+        sdbCancelFetch(pMnode->pSdb, pIter);
+        sdbRelease(pMnode->pSdb, pDnode);
+        code = TSDB_CODE_OUT_OF_MEMORY;
+        return code;
+      }
+
+      if ((bufLen = tSerializeSDCfgDnodeReq(pBuf, bufLen, pDcfgReq)) <= 0) {
+        sdbCancelFetch(pMnode->pSdb, pIter);
+        sdbRelease(pMnode->pSdb, pDnode);
+        code = bufLen;
+        rpcFreeCont(pBuf);
+        return code;
+      }
+
+      mInfo("dnode:%d, send config req to dnode, config:%s value:%s", pDnode->id, pDcfgReq->config, pDcfgReq->value);
+      SRpcMsg rpcMsg = {.msgType = TDMT_DND_CONFIG_DNODE, .pCont = pBuf, .contLen = bufLen};
+      SRpcMsg rpcRsp = {0};
+
+      code = rpcSendRecvWithTimeout(pMnode->msgCb.statusRpc, &epSet, &rpcMsg, &rpcRsp, NULL, CFG_ALTER_TIMEOUT);
+      if (code != 0) {
+        mError("failed to send config req to dnode:%d, since %s", pDnode->id, tstrerror(code));
+        sdbCancelFetch(pMnode->pSdb, pIter);
+        sdbRelease(pMnode->pSdb, pDnode);
+        return code;
+      }
+
+      code = rpcRsp.code;
+      if (code != 0) {
+        mError("failed to alter config %s,on dnode:%d, since %s", pDcfgReq->config, pDnode->id, tstrerror(code));
+        sdbCancelFetch(pMnode->pSdb, pIter);
+        sdbRelease(pMnode->pSdb, pDnode);
+        return code;
       }
     }
-
     sdbRelease(pSdb, pDnode);
   }
 
@@ -541,8 +567,8 @@ static int32_t mndProcessConfigDnodeReq(SRpcMsg *pReq) {
       updateIpWhiteList = 1;
     }
 
-    bool isUpdateAll = (cfgReq.dnodeId == 0 || cfgReq.dnodeId == -1) ? true : false;
-    TAOS_CHECK_GOTO(cfgCheckRangeForDynUpdate(taosGetCfg(), dcfgReq.config, dcfgReq.value, true, isUpdateAll), &lino,
+    CfgAlterType alterType = (cfgReq.dnodeId == 0 || cfgReq.dnodeId == -1) ? CFG_ALTER_ALL_DNODES : CFG_ALTER_DNODE;
+    TAOS_CHECK_GOTO(cfgCheckRangeForDynUpdate(taosGetCfg(), dcfgReq.config, dcfgReq.value, true, alterType), &lino,
                     _err_out);
   }
   SConfigItem *pItem = cfgGetItem(taosGetCfg(), dcfgReq.config);
@@ -658,6 +684,7 @@ static int32_t initConfigArrayFromSdb(SMnode *pMnode, SArray *array) {
       goto _exit;
     }
     if (strcasecmp(obj->name, "tsmmConfigVersion") == 0) {
+      sdbRelease(pSdb, obj);
       continue;
     }
     SConfigItem item = {0};
diff --git a/source/libs/command/src/command.c b/source/libs/command/src/command.c
index f16c28f4ef..d0656026f1 100644
--- a/source/libs/command/src/command.c
+++ b/source/libs/command/src/command.c
@@ -726,7 +726,8 @@ static void appendTableOptions(char* buf, int32_t* len, SDbCfgInfo* pDbCfg, STab
   }
 }
 
-static int32_t setCreateTBResultIntoDataBlock(SSDataBlock* pBlock, SDbCfgInfo* pDbCfg, char* tbName, STableCfg* pCfg, void* charsetCxt) {
+static int32_t setCreateTBResultIntoDataBlock(SSDataBlock* pBlock, SDbCfgInfo* pDbCfg, char* tbName, STableCfg* pCfg,
+                                              void* charsetCxt) {
   int32_t code = TSDB_CODE_SUCCESS;
   QRY_ERR_RET(blockDataEnsureCapacity(pBlock, 1));
   pBlock->info.rows = 1;
@@ -905,7 +906,7 @@ static int32_t execAlterLocal(SAlterLocalStmt* pStmt) {
     goto _return;
   }
 
-  if (cfgCheckRangeForDynUpdate(tsCfg, pStmt->config, pStmt->value, false, false)) {
+  if (cfgCheckRangeForDynUpdate(tsCfg, pStmt->config, pStmt->value, false, CFG_ALTER_LOCAL)) {
     return terrno;
   }
 
@@ -1064,7 +1065,8 @@ static int32_t execShowCreateView(SShowCreateViewStmt* pStmt, SRetrieveTableRsp*
   return code;
 }
 
-int32_t qExecCommand(int64_t* pConnId, bool sysInfoUser, SNode* pStmt, SRetrieveTableRsp** pRsp, int8_t biMode, void* charsetCxt) {
+int32_t qExecCommand(int64_t* pConnId, bool sysInfoUser, SNode* pStmt, SRetrieveTableRsp** pRsp, int8_t biMode,
+                     void* charsetCxt) {
   switch (nodeType(pStmt)) {
     case QUERY_NODE_DESCRIBE_STMT:
       return execDescribe(sysInfoUser, pStmt, pRsp, biMode);
diff --git a/source/libs/transport/src/tmsgcb.c b/source/libs/transport/src/tmsgcb.c
index 4c969003a9..fab80bde9c 100644
--- a/source/libs/transport/src/tmsgcb.c
+++ b/source/libs/transport/src/tmsgcb.c
@@ -48,6 +48,7 @@ int32_t tmsgSendReq(const SEpSet* epSet, SRpcMsg* pMsg) {
   }
   return code;
 }
+
 int32_t tmsgSendSyncReq(const SEpSet* epSet, SRpcMsg* pMsg) {
   int32_t code = (*defaultMsgCb.sendSyncReqFp)(epSet, pMsg);
   if (code != 0) {
diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index f18fdfe970..75b3ce9b58 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -585,7 +585,8 @@ int32_t checkItemDyn(SConfigItem *pItem, bool isServer) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t cfgCheckRangeForDynUpdate(SConfig *pCfg, const char *name, const char *pVal, bool isServer, bool isUpdateAll) {
+int32_t cfgCheckRangeForDynUpdate(SConfig *pCfg, const char *name, const char *pVal, bool isServer,
+                                  CfgAlterType alterType) {
   cfgLock(pCfg);
 
   SConfigItem *pItem = cfgGetItem(pCfg, name);
@@ -598,7 +599,7 @@ int32_t cfgCheckRangeForDynUpdate(SConfig *pCfg, const char *name, const char *p
     cfgUnLock(pCfg);
     TAOS_RETURN(code);
   }
-  if ((!isUpdateAll) && (pItem->category == CFG_CATEGORY_GLOBAL)) {
+  if ((pItem->category == CFG_CATEGORY_GLOBAL) && alterType == CFG_ALTER_DNODE) {
     uError("failed to config:%s, not support update global config on only one dnode", name);
     cfgUnLock(pCfg);
     TAOS_RETURN(TSDB_CODE_INVALID_CFG);
diff --git a/tests/army/alter/test_alter_config.py b/tests/army/alter/test_alter_config.py
index 52072dae5c..1b59293187 100644
--- a/tests/army/alter/test_alter_config.py
+++ b/tests/army/alter/test_alter_config.py
@@ -315,11 +315,6 @@ class TDTestCase:
                     "value": 500,
                     "category": "global"
                 },
-                {
-                    "name": "syncElectInterval",
-                    "value": 50000,
-                    "category": "global"
-                },
                 {
                     "name": "syncHeartbeatInterval",
                     "value": 3000,