diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index ceb3d62bb3..44f097eb60 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -183,6 +183,7 @@ extern int64_t tsWalFsyncDataSizeLimit;
 extern int32_t tsTransPullupInterval;
 extern int32_t tsMqRebalanceInterval;
 extern int32_t tsStreamCheckpointTickInterval;
+extern int32_t tsStreamNodeCheckInterval;
 extern int32_t tsTtlUnit;
 extern int32_t tsTtlPushInterval;
 extern int32_t tsGrantHBInterval;
diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index 0065caf3b3..19760ff2f0 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -156,6 +156,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_TRANS_TIMER, "trans-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_TTL_TIMER, "ttl-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_GRANT_HB_TIMER, "grant-hb-tmr", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_MND_NODECHECK_TIMER, "node-check-tmr", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_KILL_TRANS, "kill-trans", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_KILL_QUERY, "kill-query", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_KILL_CONN, "kill-conn", NULL, NULL)
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 4c886178df..0891aaf42f 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -537,7 +537,6 @@ int32_t tDecodeStreamCheckpointReadyMsg(SDecoder* pDecoder, SStreamCheckpointRea
 
 typedef struct {
   int32_t vgId;
-  SEpSet  epset;
   int32_t numOfTasks;
 } SStreamHbMsg;
 
@@ -555,15 +554,20 @@ typedef struct {
 int32_t tEncodeCompleteHistoryDataMsg(SEncoder* pEncoder, const SStreamCompleteHistoryMsg* pReq);
 int32_t tDecodeCompleteHistoryDataMsg(SDecoder* pDecoder, SStreamCompleteHistoryMsg* pReq);
 
+typedef struct {
+  int32_t nodeId;
+  SEpSet  prevEp;
+  SEpSet  newEp;
+} SNodeUpdateInfo;
+
 typedef struct {
   int64_t streamId;
   int32_t taskId;
-  int32_t nodeId;
-  SEpSet  epset;
-} SStreamTaskUpdateMsg;
+  SArray* pNodeList;   // SArray<SNodeUpdateInfo>
+} SStreamTaskNodeUpdateMsg;
 
-int32_t tEncodeStreamTaskUpdateMsg(SEncoder* pEncoder, const SStreamTaskUpdateMsg* pMsg);
-int32_t tDecodeStreamTaskUpdateMsg(SDecoder* pDecoder, SStreamTaskUpdateMsg* pMsg);
+int32_t tEncodeStreamTaskUpdateMsg(SEncoder* pEncoder, const SStreamTaskNodeUpdateMsg* pMsg);
+int32_t tDecodeStreamTaskUpdateMsg(SDecoder* pDecoder, SStreamTaskNodeUpdateMsg* pMsg);
 
 typedef struct {
   int64_t streamId;
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index b8455df9a9..c67e94fd8a 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -223,6 +223,7 @@ int64_t tsWalFsyncDataSizeLimit = (100 * 1024 * 1024L);
 int32_t tsTransPullupInterval = 2;
 int32_t tsMqRebalanceInterval = 2;
 int32_t tsStreamCheckpointTickInterval = 20;
+int32_t tsStreamNodeCheckInterval = 10;
 int32_t tsTtlUnit = 86400;
 int32_t tsTtlPushInterval = 3600;
 int32_t tsGrantHBInterval = 60;
diff --git a/source/dnode/mnode/impl/src/mndMain.c b/source/dnode/mnode/impl/src/mndMain.c
index d47bd78427..c739636a84 100644
--- a/source/dnode/mnode/impl/src/mndMain.c
+++ b/source/dnode/mnode/impl/src/mndMain.c
@@ -120,7 +120,6 @@ static void mndPullupTtl(SMnode *pMnode) {
 }
 
 static void mndCalMqRebalance(SMnode *pMnode) {
-  mTrace("calc mq rebalance");
   int32_t contLen = 0;
   void   *pReq = mndBuildTimerMsg(&contLen);
   if (pReq != NULL) {
@@ -133,11 +132,16 @@ static void mndStreamCheckpointTick(SMnode *pMnode, int64_t sec) {
   int32_t contLen = 0;
   void   *pReq = mndBuildCheckpointTickMsg(&contLen, sec);
   if (pReq != NULL) {
-    SRpcMsg rpcMsg = {
-        .msgType = TDMT_MND_STREAM_CHECKPOINT_TIMER,
-        .pCont = pReq,
-        .contLen = contLen,
-    };
+    SRpcMsg rpcMsg = {.msgType = TDMT_MND_STREAM_CHECKPOINT_TIMER, .pCont = pReq, .contLen = contLen};
+    tmsgPutToQueue(&pMnode->msgCb, READ_QUEUE, &rpcMsg);
+  }
+}
+
+static void mndStreamCheckNode(SMnode* pMnode) {
+  int32_t contLen = 0;
+  void   *pReq = mndBuildTimerMsg(&contLen);
+  if (pReq != NULL) {
+    SRpcMsg rpcMsg = {.msgType = TDMT_MND_NODECHECK_TIMER, .pCont = pReq, .contLen = contLen};
     tmsgPutToQueue(&pMnode->msgCb, READ_QUEUE, &rpcMsg);
   }
 }
@@ -268,6 +272,10 @@ static void *mndThreadFp(void *param) {
       mndStreamCheckpointTick(pMnode, sec);
     }
 
+    if (sec % tsStreamNodeCheckInterval == 0) {
+      mndStreamCheckNode(pMnode);
+    }
+
     if (sec % tsTelemInterval == (TMIN(60, (tsTelemInterval - 1)))) {
       mndPullupTelem(pMnode);
     }
diff --git a/source/dnode/mnode/impl/src/mndStream.c b/source/dnode/mnode/impl/src/mndStream.c
index d23efe175d..98c82ffc05 100644
--- a/source/dnode/mnode/impl/src/mndStream.c
+++ b/source/dnode/mnode/impl/src/mndStream.c
@@ -34,6 +34,7 @@
 #define MND_STREAM_MAX_NUM      60
 #define MND_STREAM_HB_INTERVAL  100  // 100 sec
 
+
 typedef struct SNodeEntry {
   int32_t nodeId;
   SEpSet  epset;           // compare the epset to identify the vgroup tranferring between different dnodes.
@@ -41,10 +42,11 @@ typedef struct SNodeEntry {
 } SNodeEntry;
 
 typedef struct SStreamVnodeRevertIndex {
-//  SHashObj* pVnodeMap;
+  SArray*   pDBList;
   SArray*   pNodeEntryList;
 } SStreamVnodeRevertIndex;
 
+static int32_t                 mndNodeCheckSentinel = 0;
 static SStreamVnodeRevertIndex execNodeList;
 
 static int32_t mndStreamActionInsert(SSdb *pSdb, SStreamObj *pStream);
@@ -66,6 +68,7 @@ static int32_t mndProcessPauseStreamReq(SRpcMsg *pReq);
 static int32_t mndProcessResumeStreamReq(SRpcMsg *pReq);
 static int32_t mndBuildStreamCheckpointSourceReq2(void **pBuf, int32_t *pLen, int32_t nodeId, int64_t checkpointId,
                                                   int64_t streamId, int32_t taskId);
+static int32_t mndProcessNodeCheckReq(SRpcMsg *pMsg);
 
 static int32_t mndPersistTransLog(SStreamObj* pStream, STrans* pTrans);
 static void initTransAction(STransAction* pAction, void* pCont, int32_t contLen, int32_t msgType, const SEpSet* pEpset);
@@ -83,6 +86,8 @@ int32_t mndInitStream(SMnode *pMnode) {
 
   mndSetMsgHandle(pMnode, TDMT_MND_CREATE_STREAM, mndProcessCreateStreamReq);
   mndSetMsgHandle(pMnode, TDMT_MND_DROP_STREAM, mndProcessDropStreamReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_NODECHECK_TIMER, mndProcessNodeCheckReq);
+
   /*mndSetMsgHandle(pMnode, TDMT_MND_RECOVER_STREAM, mndProcessRecoverStreamReq);*/
 
   mndSetMsgHandle(pMnode, TDMT_STREAM_TASK_DEPLOY_RSP, mndTransProcessRsp);
@@ -1729,10 +1734,18 @@ static int32_t mndProcessResumeStreamReq(SRpcMsg *pReq) {
   return TSDB_CODE_ACTION_IN_PROGRESS;
 }
 
-static int32_t doBuildStreamTaskUpdateMsg(void** pBuf, int32_t* pLen, int32_t nodeId, const SEpSet* pEpset) {
-  SStreamTaskUpdateMsg req = {0};
-  req.nodeId = nodeId;
-  req.epset = *pEpset;
+typedef struct SVgroupChangeInfo {
+  SHashObj* pDBMap;
+  SArray*   pUpdateNodeList;   //SArray<SNodeUpdateInfo>
+} SVgroupChangeInfo;
+
+static void initNodeUpdateMsg(SStreamTaskNodeUpdateMsg* pMsg, const SVgroupChangeInfo* pInfo) {
+  taosArrayAddAll(pMsg->pNodeList, pInfo->pUpdateNodeList);
+}
+
+static int32_t doBuildStreamTaskUpdateMsg(void** pBuf, int32_t* pLen, int32_t nodeId, SVgroupChangeInfo* pInfo) {
+  SStreamTaskNodeUpdateMsg req = {0};
+  initNodeUpdateMsg(&req, pInfo);
 
   int32_t code = 0;
   int32_t blen;
@@ -1800,7 +1813,7 @@ void initTransAction(STransAction* pAction, void* pCont, int32_t contLen, int32_
 }
 
 // build trans to update the epset
-static int32_t createStreamUpdateTrans(SMnode *pMnode, SStreamObj *pStream, int32_t nodeId, SEpSet *pEpset) {
+static int32_t createStreamUpdateTrans(SMnode *pMnode, SStreamObj *pStream, SVgroupChangeInfo* pInfo) {
   STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, TRN_CONFLICT_DB_INSIDE, NULL, "stream-task-update");
   if (pTrans == NULL) {
     mError("failed to build stream task DAG update, reason: %s", tstrerror(TSDB_CODE_OUT_OF_MEMORY));
@@ -1830,11 +1843,10 @@ static int32_t createStreamUpdateTrans(SMnode *pMnode, SStreamObj *pStream, int3
 
       void   *pBuf = NULL;
       int32_t len = 0;
-      doBuildStreamTaskUpdateMsg(&pBuf, &len, nodeId, pEpset);
+      doBuildStreamTaskUpdateMsg(&pBuf, &len, pTask->info.nodeId, pInfo);
 
       STransAction action = {0};
       initTransAction(&action, pBuf, len, TDMT_VND_STREAM_TASK_UPDATE, &pTask->info.epSet);
-
       if (mndTransAppendRedoAction(pTrans, &action) != 0) {
         taosMemoryFree(pBuf);
         taosWUnLockLatch(&pStream->lock);
@@ -1847,6 +1859,122 @@ static int32_t createStreamUpdateTrans(SMnode *pMnode, SStreamObj *pStream, int3
   return mndPersistTransLog(pStream, pTrans);
 }
 
+// todo. 1. multiple change, 2. replica change problem
+static SVgroupChangeInfo mndFindChangedVgroupInfo(SMnode *pMnode, const SArray *pPrevVgroupList,
+                                                  const SArray *pVgroupList) {
+  SVgroupChangeInfo info = {
+      .pUpdateNodeList = taosArrayInit(4, sizeof(SNodeUpdateInfo)),
+      .pDBMap = taosHashInit(32, taosGetDefaultHashFunction(TSDB_DATA_TYPE_VARCHAR), true, HASH_NO_LOCK),
+  };
+
+  int32_t numOfVgroups = taosArrayGetSize(pPrevVgroupList);
+  for (int32_t i = 0; i < numOfVgroups; ++i) {
+    SNodeEntry *pPrevEntry = taosArrayGet(pPrevVgroupList, i);
+
+    int32_t num = taosArrayGetSize(pVgroupList);
+    for (int32_t j = 0; j < num; ++j) {
+      SNodeEntry *pCurrent = taosArrayGet(pVgroupList, j);
+      if (pCurrent->nodeId == pPrevEntry->nodeId) {
+        // todo handle the replica change problem.
+        if (!isEpsetEqual(&pCurrent->epset, &pPrevEntry->epset)) {
+          SNodeUpdateInfo updateInfo = {.nodeId = pPrevEntry->nodeId};
+          epsetAssign(&updateInfo.prevEp, &pPrevEntry->epset);
+          epsetAssign(&updateInfo.newEp, &pCurrent->epset);
+          taosArrayPush(info.pUpdateNodeList, &updateInfo);
+
+          SVgObj *pVgroup = mndAcquireVgroup(pMnode, pCurrent->nodeId);
+          taosHashPut(info.pDBMap, pVgroup->dbName, strlen(pVgroup->dbName), NULL, 0);
+          mndReleaseVgroup(pMnode, pVgroup);
+        }
+        break;
+      }
+    }
+  }
+
+  return info;
+}
+
+static SArray* mndTakeVgroupSnapshot(SMnode* pMnode) {
+  SSdb   *pSdb = pMnode->pSdb;
+  void   *pIter = NULL;
+  SVgObj *pVgroup = NULL;
+
+  SArray* pVgroupListSnapshot = taosArrayInit(4, sizeof(SNodeEntry));
+
+  while (1) {
+    pIter = sdbFetch(pSdb, SDB_VGROUP, pIter, (void **)&pVgroup);
+    if (pIter == NULL) {
+      break;
+    }
+
+    SNodeEntry entry = {0};
+    entry.epset = mndGetVgroupEpset(pMnode, pVgroup);
+    entry.nodeId = pVgroup->vgId;
+    entry.hbTimestamp = -1;
+
+    taosArrayPush(pVgroupListSnapshot, &entry);
+    sdbRelease(pSdb, pVgroup);
+  }
+
+  return pVgroupListSnapshot;
+}
+
+int32_t mndProcessVgroupChange(SMnode *pMnode, SVgroupChangeInfo* pChangeInfo) {
+  SSdb *pSdb = pMnode->pSdb;
+
+  // check all streams that involved this vnode should update the epset info
+  SStreamObj *pStream = NULL;
+  void       *pIter = NULL;
+  while (1) {
+    pIter = sdbFetch(pSdb, SDB_STREAM, pIter, (void **)&pStream);
+    if (pIter == NULL) {
+      break;
+    }
+
+    // update the related upstream and downstream tasks, todo remove this, no need this function
+    //    taosWLockLatch(&pStream->lock);
+    //      streamTaskUpdateEpInfo(pStream->tasks, req.vgId, &req.epset);
+    //      streamTaskUpdateEpInfo(pStream->pHTasksList, req.vgId, &req.epset);
+    //    taosWUnLockLatch(&pStream->lock);
+    void* p = taosHashGet(pChangeInfo->pDBMap, pStream->targetDb, strlen(pStream->targetDb));
+    void* p1 = taosHashGet(pChangeInfo->pDBMap, pStream->sourceDb, strlen(pStream->sourceDb));
+    if (p == NULL && p1 == NULL) {
+      mndReleaseStream(pMnode, pStream);
+      continue;
+    }
+
+    int32_t code = createStreamUpdateTrans(pMnode, pStream, pChangeInfo);
+    if (code != TSDB_CODE_SUCCESS) {
+      // todo
+    }
+  }
+
+  return 0;
+}
+
+static int32_t mndProcessNodeCheckReq(SRpcMsg *pMsg) {
+  int32_t old = atomic_val_compare_exchange_32(&mndNodeCheckSentinel, 0, 1);
+  if (old != 0) {
+    mDebug("still in checking node change");
+    return 0;
+  }
+
+  mDebug("start to do node change checking");
+
+  SMnode *pMnode = pMsg->info.node;
+  SArray *pNodeSnapshot = mndTakeVgroupSnapshot(pMnode);
+
+  SVgroupChangeInfo changeInfo = mndFindChangedVgroupInfo(pMnode, execNodeList.pNodeEntryList, pNodeSnapshot);
+
+  if (taosArrayGetSize(changeInfo.pUpdateNodeList) > 0) {
+    mndProcessVgroupChange(pMnode, &changeInfo);
+
+  }
+
+  mDebug("end to do node change checking");
+  return 0;
+}
+
 // todo: this process should be executed by the write queue worker of the mnode
 int32_t mndProcessStreamHb(SRpcMsg *pReq) {
   SMnode      *pMnode = pReq->info.node;
@@ -1889,10 +2017,10 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
 
     // check epset to identify whether the node has been transferred to other dnodes.
     // node the epset is changed, which means the node transfer has occurred for this node.
-    if (!isEpsetEqual(&pEntry->epset, &req.epset)) {
-      nodeChanged = true;
-      break;
-    }
+//    if (!isEpsetEqual(&pEntry->epset, &req.epset)) {
+//      nodeChanged = true;
+//      break;
+//    }
   }
 
   // todo handle the node timeout case. Once the vnode is off-line, we should check the dnode status from mnode,
@@ -1904,7 +2032,6 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
   }
 
   int32_t nodeId = req.vgId;
-  SEpSet  newEpSet = req.epset;
 
   {// check all streams that involved this vnode should update the epset info
     SStreamObj *pStream = NULL;
@@ -1917,14 +2044,14 @@ int32_t mndProcessStreamHb(SRpcMsg *pReq) {
 
       // update the related upstream and downstream tasks, todo remove this, no need this function
       taosWLockLatch(&pStream->lock);
-      streamTaskUpdateEpInfo(pStream->tasks, req.vgId, &req.epset);
-      streamTaskUpdateEpInfo(pStream->pHTasksList, req.vgId, &req.epset);
+//      streamTaskUpdateEpInfo(pStream->tasks, req.vgId, &req.epset);
+//      streamTaskUpdateEpInfo(pStream->pHTasksList, req.vgId, &req.epset);
       taosWUnLockLatch(&pStream->lock);
 
-      code = createStreamUpdateTrans(pMnode, pStream, nodeId, &newEpSet);
-      if (code != TSDB_CODE_SUCCESS) {
-        // todo
-      }
+//      code = createStreamUpdateTrans(pMnode, pStream, nodeId, );
+//      if (code != TSDB_CODE_SUCCESS) {
+//         todo
+//      }
     }
   }
 
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 60645602fe..8b3cfb2d9b 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -1822,7 +1822,7 @@ int32_t tqProcessTaskUpdateReq(STQ* pTq, SRpcMsg* pMsg) {
   int32_t      len = pMsg->contLen - sizeof(SMsgHead);
   int32_t      code = 0;
 
-  SStreamTaskUpdateMsg req = {0};
+  SStreamTaskNodeUpdateMsg req = {0};
 
   SDecoder decoder;
   tDecoderInit(&decoder, (uint8_t*)msg, len);
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index 58cd613209..c3695e9a43 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -973,22 +973,40 @@ int32_t streamNotifyUpstreamContinue(SStreamTask* pTask) {
   return 0;
 }
 
-int32_t tEncodeStreamTaskUpdateMsg(SEncoder* pEncoder, const SStreamTaskUpdateMsg* pMsg) {
+int32_t tEncodeStreamTaskUpdateMsg(SEncoder* pEncoder, const SStreamTaskNodeUpdateMsg* pMsg) {
   if (tStartEncode(pEncoder) < 0) return -1;
   if (tEncodeI64(pEncoder, pMsg->streamId) < 0) return -1;
   if (tEncodeI32(pEncoder, pMsg->taskId) < 0) return -1;
-  if (tEncodeI32(pEncoder, pMsg->nodeId) < 0) return -1;
-  if (tEncodeSEpSet(pEncoder, &pMsg->epset) < 0) return -1;
+
+  int32_t size = taosArrayGetSize(pMsg->pNodeList);
+  if (tEncodeI32(pEncoder, size) < 0) return -1;
+
+  for (int32_t i = 0; i < size; ++i) {
+    SNodeUpdateInfo* pInfo = taosArrayGet(pMsg->pNodeList, i);
+    if (tEncodeI32(pEncoder, pInfo->nodeId) < 0) return -1;
+    if (tEncodeSEpSet(pEncoder, &pInfo->prevEp) < 0) return -1;
+    if (tEncodeSEpSet(pEncoder, &pInfo->newEp) < 0) return -1;
+  }
   tEndEncode(pEncoder);
   return pEncoder->pos;
 }
 
-int32_t tDecodeStreamTaskUpdateMsg(SDecoder* pDecoder, SStreamTaskUpdateMsg* pMsg) {
+int32_t tDecodeStreamTaskUpdateMsg(SDecoder* pDecoder, SStreamTaskNodeUpdateMsg* pMsg) {
   if (tStartDecode(pDecoder) < 0) return -1;
   if (tDecodeI64(pDecoder, &pMsg->streamId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pMsg->taskId) < 0) return -1;
-  if (tDecodeI32(pDecoder, &pMsg->nodeId) < 0) return -1;
-  if (tDecodeSEpSet(pDecoder, &pMsg->epset) < 0) return -1;
+
+  int32_t size = 0;
+  if (tDecodeI32(pDecoder, &size) < 0) return -1;
+  pMsg->pNodeList = taosArrayInit(size, sizeof(SNodeUpdateInfo));
+  for (int32_t i = 0; i < size; ++i) {
+    SNodeUpdateInfo info = {0};
+    if (tDecodeI32(pDecoder, &info.nodeId) < 0) return -1;
+    if (tDecodeSEpSet(pDecoder, &info.prevEp) < 0) return -1;
+    if (tDecodeSEpSet(pDecoder, &info.newEp) < 0) return -1;
+    taosArrayPush(pMsg->pNodeList, &info);
+  }
+
   tEndDecode(pDecoder);
   return 0;
 }
\ No newline at end of file
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index 6b99d52f98..4a746f4961 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -93,7 +93,7 @@ SStreamMeta* streamMetaOpen(const char* path, void* ahandle, FTaskExpand expandF
   pMeta->expandFunc = expandFunc;
 
   // send heartbeat every 20sec.
-//  pMeta->hbTmr = taosTmrStart(metaHbToMnode, 20000, ahandle, streamEnv.timer);
+  pMeta->hbTmr = taosTmrStart(metaHbToMnode, 20000, pMeta, streamEnv.timer);
 
   pMeta->pTaskBackendUnique =
       taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_ENTRY_LOCK);
@@ -534,7 +534,6 @@ int32_t tEncodeStreamHbMsg(SEncoder* pEncoder, const SStreamHbMsg* pReq) {
   if (tStartEncode(pEncoder) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->vgId) < 0) return -1;
   if (tEncodeI32(pEncoder, pReq->numOfTasks) < 0) return -1;
-  if (tEncodeSEpSet(pEncoder, &pReq->epset) < 0) return -1;
   tEndEncode(pEncoder);
   return pEncoder->pos;
 }
@@ -543,13 +542,12 @@ int32_t tDecodeStreamHbMsg(SDecoder* pDecoder, SStreamHbMsg* pReq) {
   if (tStartDecode(pDecoder) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->vgId) < 0) return -1;
   if (tDecodeI32(pDecoder, &pReq->numOfTasks) < 0) return -1;
-  if (tDecodeSEpSet(pDecoder, &pReq->epset) < 0) return -1;
   tEndDecode(pDecoder);
   return 0;
 }
 
 void metaHbToMnode(void* param, void* tmrId) {
-  STQ* pMeta = param;
+  SStreamMeta* pMeta = param;
   SStreamHbMsg hbMsg = {0};
 
   taosRLockLatch(&pMeta->lock);
@@ -558,7 +556,6 @@ void metaHbToMnode(void* param, void* tmrId) {
 
   hbMsg.numOfTasks = numOfTasks;
   hbMsg.vgId = pMeta->vgId;
-  hbMsg.epset = ;
 
   int32_t code = 0;
   int32_t tlen = 0;
@@ -592,4 +589,7 @@ void metaHbToMnode(void* param, void* tmrId) {
   qDebug("vgId:%d, build and send hb to mnode", pMeta->mgmtInfo.mnodeId);
 
   tmsgSendReq(&pMeta->mgmtInfo.epset, &msg);
+
+  // next hb will be issued in 20sec.
+  taosTmrReset(metaHbToMnode, 20000, pMeta, streamEnv.timer, pMeta->hbTmr);
 }
\ No newline at end of file