diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index e6e78bd1df6a7c1f7b8dcdde35a40604dc913c2d..d2e01f218619fae0fcdaa63241ab3ad85bc28edf 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -174,6 +174,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_SERVER_VERSION, "server-version", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_UPTIME_TIMER, "uptime-timer", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_TMQ_LOST_CONSUMER_CLEAR, "lost-consumer-clear", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_MND_STREAM_HEARTBEAT, "stream-heartbeat", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_MAX_MSG, "mnd-max", NULL, NULL)
 
   TD_DEF_MSG_TYPE(TDMT_MND_BALANCE_VGROUP_LEADER, "balance-vgroup-leader", NULL, NULL)
diff --git a/include/libs/stream/tstream.h b/include/libs/stream/tstream.h
index 2c46b2aa7b00ed04a4189cc03d3e4243b2f1ae6f..e5f7093aef0c2d640802621fc47c2b2ca2fcdb33 100644
--- a/include/libs/stream/tstream.h
+++ b/include/libs/stream/tstream.h
@@ -14,6 +14,7 @@
  */
 
 #include "os.h"
+#include "ttimer.h"
 #include "streamState.h"
 #include "tdatablock.h"
 #include "tdbInt.h"
@@ -369,6 +370,7 @@ typedef struct SStreamMeta {
   int64_t       streamBackendRid;
   SHashObj*     pTaskBackendUnique;
   TdThreadMutex backendMutex;
+  tmr_h         hbTmr;
 
   int32_t  chkptNotReadyTasks;
   SArray*  checkpointSaved;
@@ -515,6 +517,14 @@ typedef struct {
 int32_t tEncodeStreamCheckpointReadyMsg(SEncoder* pEncoder, const SStreamCheckpointReadyMsg* pRsp);
 int32_t tDecodeStreamCheckpointReadyMsg(SDecoder* pDecoder, SStreamCheckpointReadyMsg* pRsp);
 
+typedef struct {
+  int32_t vgId;
+  int32_t numOfTasks;
+} SStreamHbMsg;
+
+int32_t tEncodeStreamHbMsg(SEncoder* pEncoder, const SStreamHbMsg* pRsp);
+int32_t tDecodeStreamHbMsg(SDecoder* pDecoder, SStreamHbMsg* pRsp);
+
 typedef struct {
   int64_t streamId;
   int32_t upstreamTaskId;
@@ -572,7 +582,7 @@ bool    streamTaskShouldStop(const SStreamStatus* pStatus);
 bool    streamTaskShouldPause(const SStreamStatus* pStatus);
 bool    streamTaskIsIdle(const SStreamTask* pTask);
 
-SStreamChildEpInfo * streamTaskGetUpstreamTaskEpInfo(SStreamTask* pTask, int32_t taskId);
+void    initRpcMsg(SRpcMsg* pMsg, int32_t msgType, void* pCont, int32_t contLen);
 int32_t streamScanExec(SStreamTask* pTask, int32_t batchSz);
 
 char* createStreamTaskIdStr(int64_t streamId, int32_t taskId);
@@ -637,7 +647,7 @@ void         streamMetaRemoveTask(SStreamMeta* pMeta, int32_t taskId);
 
 int32_t streamMetaBegin(SStreamMeta* pMeta);
 int32_t streamMetaCommit(SStreamMeta* pMeta);
-int32_t streamLoadTasks(SStreamMeta* pMeta, int64_t ver);
+int32_t streamLoadTasks(SStreamMeta* pMeta);
 
 // checkpoint
 int32_t streamProcessCheckpointSourceReq(SStreamTask* pTask, SStreamCheckpointSourceReq* pReq);
diff --git a/include/util/tencode.h b/include/util/tencode.h
index ff97a205073822be2c98e39469066a0470794a51..d05d4914e37aa25777a30cbbd89545a14a9779d6 100644
--- a/include/util/tencode.h
+++ b/include/util/tencode.h
@@ -89,7 +89,7 @@ typedef struct {
       RET = -1;                      \
     }                                \
     tEncoderClear(&coder);           \
-  } while (0)
+  } while (0);
 
 static void* tEncoderMalloc(SEncoder* pCoder, int32_t size);
 static void* tDecoderMalloc(SDecoder* pCoder, int32_t size);
diff --git a/source/dnode/vnode/src/inc/tq.h b/source/dnode/vnode/src/inc/tq.h
index 18ca3fb8b87cbc1bc97c913fd9245ef34d23895c..94993f99afe303e95c00e01621c3bf1511df4837 100644
--- a/source/dnode/vnode/src/inc/tq.h
+++ b/source/dnode/vnode/src/inc/tq.h
@@ -112,17 +112,10 @@ struct STQ {
   SStreamMeta*    pStreamMeta;
 };
 
-typedef struct {
-  int8_t inited;
-  tmr_h  timer;
-} STqMgmt;
-
 typedef struct {
   int32_t size;
 } STqOffsetHead;
 
-static STqMgmt tqMgmt = {0};
-
 int32_t tEncodeSTqHandle(SEncoder* pEncoder, const STqHandle* pHandle);
 int32_t tDecodeSTqHandle(SDecoder* pDecoder, STqHandle* pHandle);
 void    tqDestroyTqHandle(void* data);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index d4a897f99cbc734970e6a502b6dabf5567284393..d9355d26da026464dc085f780b742dfb62d4e9cc 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -15,6 +15,12 @@
 
 #include "tq.h"
 
+typedef struct {
+  int8_t inited;
+} STqMgmt;
+
+static STqMgmt tqMgmt = {0};
+
 // 0: not init
 // 1: already inited
 // 2: wait to be inited or cleaup
@@ -32,11 +38,6 @@ int32_t tqInit() {
   }
 
   if (old == 0) {
-    tqMgmt.timer = taosTmrInit(10000, 100, 10000, "TQ");
-    if (tqMgmt.timer == NULL) {
-      atomic_store_8(&tqMgmt.inited, 0);
-      return -1;
-    }
     if (streamInit() < 0) {
       return -1;
     }
@@ -54,7 +55,6 @@ void tqCleanUp() {
   }
 
   if (old == 1) {
-    taosTmrCleanUp(tqMgmt.timer);
     streamCleanUp();
     atomic_store_8(&tqMgmt.inited, 0);
   }
@@ -132,9 +132,7 @@ int32_t tqInitialize(STQ* pTq) {
     return -1;
   }
 
-  // the version is kept in task's meta data
-  // todo check if this version is required or not
-  if (streamLoadTasks(pTq->pStreamMeta, walGetCommittedVer(pTq->pVnode->pWal)) < 0) {
+  if (streamLoadTasks(pTq->pStreamMeta) < 0) {
     return -1;
   }
 
diff --git a/source/libs/stream/src/stream.c b/source/libs/stream/src/stream.c
index 43c085a4fb0ef732678d72f830a85b1e2c26c567..d6474b8fde5f977644b8434e9eb0ad91d4ec1bda 100644
--- a/source/libs/stream/src/stream.c
+++ b/source/libs/stream/src/stream.c
@@ -31,7 +31,7 @@ int32_t streamInit() {
   }
 
   if (old == 0) {
-    streamEnv.timer = taosTmrInit(10000, 100, 10000, "STREAM");
+    streamEnv.timer = taosTmrInit(1000, 100, 10000, "STREAM");
     if (streamEnv.timer == NULL) {
       atomic_store_8(&streamEnv.inited, 0);
       return -1;
diff --git a/source/libs/stream/src/streamDispatch.c b/source/libs/stream/src/streamDispatch.c
index c5ae27029b5c096df8ee991befc634c09f05843c..0792ed208b4af9845c745cd0be12ce9694e409bf 100644
--- a/source/libs/stream/src/streamDispatch.c
+++ b/source/libs/stream/src/streamDispatch.c
@@ -32,7 +32,7 @@ typedef struct {
   SEpSet  epset;
 } SStreamChkptReadyInfo;
 
-static void doRetryDispatchData(void* param, void* tmrId);
+static void    doRetryDispatchData(void* param, void* tmrId);
 static int32_t doSendDispatchMsg(SStreamTask* pTask, const SStreamDispatchReq* pReq, int32_t vgId, SEpSet* pEpSet);
 static int32_t streamAddBlockIntoDispatchMsg(const SSDataBlock* pBlock, SStreamDispatchReq* pReq);
 static int32_t streamSearchAndAddBlock(SStreamTask* pTask, SStreamDispatchReq* pReqs, SSDataBlock* pDataBlock,
@@ -40,10 +40,10 @@ static int32_t streamSearchAndAddBlock(SStreamTask* pTask, SStreamDispatchReq* p
 static int32_t doDispatchScanHistoryFinishMsg(SStreamTask* pTask, const SStreamScanHistoryFinishReq* pReq, int32_t vgId,
                                               SEpSet* pEpSet);
 
-static void initRpcMsg(SRpcMsg* pMsg, int32_t msgType, void* pCont, int32_t contLen) {
-    pMsg->msgType = msgType;
-    pMsg->pCont = pCont;
-    pMsg->contLen = contLen;
+void initRpcMsg(SRpcMsg* pMsg, int32_t msgType, void* pCont, int32_t contLen) {
+  pMsg->msgType = msgType;
+  pMsg->pCont = pCont;
+  pMsg->contLen = contLen;
 }
 
 int32_t tDecodeStreamDispatchReq(SDecoder* pDecoder, SStreamDispatchReq* pReq) {
diff --git a/source/libs/stream/src/streamMeta.c b/source/libs/stream/src/streamMeta.c
index 4711f4af19816a17cac187ec8f82b43d691f6be9..67b81bc291e1421baace60ae588573a2824d4e9d 100644
--- a/source/libs/stream/src/streamMeta.c
+++ b/source/libs/stream/src/streamMeta.c
@@ -25,6 +25,8 @@ int32_t             streamBackendCfWrapperId = 0;
 
 int64_t streamGetLatestCheckpointId(SStreamMeta* pMeta);
 
+static void metaHbToMnode(void* param, void* tmrId);
+
 static void streamMetaEnvInit() {
   streamBackendId = taosOpenRef(64, streamBackendCleanup);
   streamBackendCfWrapperId = taosOpenRef(64, streamBackendHandleCleanup);
@@ -90,13 +92,8 @@ SStreamMeta* streamMetaOpen(const char* path, void* ahandle, FTaskExpand expandF
   pMeta->ahandle = ahandle;
   pMeta->expandFunc = expandFunc;
 
-  // memset(streamPath, 0, len);
-  // sprintf(streamPath, "%s/%s", pMeta->path, "state");
-  // code = taosMulModeMkDir(streamPath, 0755);
-  // if (code != 0) {
-  //   terrno = TAOS_SYSTEM_ERROR(code);
-  //   goto _err;
-  // }
+  // send heartbeat every 20sec.
+//  pMeta->hbTmr = taosTmrStart(metaHbToMnode, 20000, pMeta, streamEnv.timer);
 
   pMeta->pTaskBackendUnique =
       taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_ENTRY_LOCK);
@@ -394,35 +391,24 @@ int32_t streamMetaBegin(SStreamMeta* pMeta) {
 // todo add error log
 int32_t streamMetaCommit(SStreamMeta* pMeta) {
   if (tdbCommit(pMeta->db, pMeta->txn) < 0) {
-    qError("failed to commit stream meta");
+    qError("vgId:%d failed to commit stream meta", pMeta->vgId);
     return -1;
   }
 
   if (tdbPostCommit(pMeta->db, pMeta->txn) < 0) {
-    qError("failed to commit stream meta");
+    qError("vgId:%d failed to do post-commit stream meta", pMeta->vgId);
     return -1;
   }
 
   if (tdbBegin(pMeta->db, &pMeta->txn, tdbDefaultMalloc, tdbDefaultFree, NULL,
                TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) < 0) {
+    qError("vgId:%d failed to begin trans", pMeta->vgId);
     return -1;
   }
 
   return 0;
 }
 
-int32_t streamMetaAbort(SStreamMeta* pMeta) {
-  if (tdbAbort(pMeta->db, pMeta->txn) < 0) {
-    return -1;
-  }
-
-  if (tdbBegin(pMeta->db, &pMeta->txn, tdbDefaultMalloc, tdbDefaultFree, NULL,
-               TDB_TXN_WRITE | TDB_TXN_READ_UNCOMMITTED) < 0) {
-    return -1;
-  }
-  return 0;
-}
-
 int64_t streamGetLatestCheckpointId(SStreamMeta* pMeta) {
   int64_t chkpId = 0;
 
@@ -430,6 +416,7 @@ int64_t streamGetLatestCheckpointId(SStreamMeta* pMeta) {
   if (tdbTbcOpen(pMeta->pTaskDb, &pCur, NULL) < 0) {
     return chkpId;
   }
+
   void*    pKey = NULL;
   int32_t  kLen = 0;
   void*    pVal = NULL;
@@ -448,14 +435,14 @@ int64_t streamGetLatestCheckpointId(SStreamMeta* pMeta) {
     chkpId = TMAX(chkpId, info.checkpointId);
   }
 
-_err:
   tdbFree(pKey);
   tdbFree(pVal);
   tdbTbcClose(pCur);
 
   return chkpId;
 }
-int32_t streamLoadTasks(SStreamMeta* pMeta, int64_t ver) {
+
+int32_t streamLoadTasks(SStreamMeta* pMeta) {
   TBC* pCur = NULL;
   if (tdbTbcOpen(pMeta->pTaskDb, &pCur, NULL) < 0) {
     return -1;
@@ -519,3 +506,57 @@ int32_t streamLoadTasks(SStreamMeta* pMeta, int64_t ver) {
 
   return 0;
 }
+
+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;
+  tEndEncode(pEncoder);
+  return pEncoder->pos;
+}
+
+int32_t tDecodeStreamHbMsg(SDecoder* pDecoder, SStreamHbMsg* pRsp) {
+  if (tStartDecode(pDecoder) < 0) return -1;
+  if (tDecodeI32(pDecoder, &pRsp->vgId) < 0) return -1;
+  if (tDecodeI32(pDecoder, &pRsp->numOfTasks) < 0) return -1;
+  tEndDecode(pDecoder);
+  return 0;
+}
+
+void metaHbToMnode(void* param, void* tmrId) {
+  SStreamMeta* pMeta = param;
+  SStreamHbMsg hbMsg = {0};
+
+  int32_t code = 0;
+  int32_t tlen = 0;
+
+  tEncodeSize(tEncodeStreamHbMsg, &hbMsg, tlen, code);
+  if (code < 0) {
+    qError("vgId:%d encode stream hb msg failed, code:%s", pMeta->vgId, tstrerror(code));
+    return;
+  }
+
+  void* buf = rpcMallocCont(sizeof(SMsgHead) + tlen);
+  if (buf == NULL) {
+    qError("vgId:%d encode stream hb msg failed, code:%s", pMeta->vgId, tstrerror(TSDB_CODE_OUT_OF_MEMORY));
+    return;
+  }
+
+//  ((SMsgHead*)buf)->vgId = htonl(nodeId);
+//  void* pBuf = POINTER_SHIFT(buf, sizeof(SMsgHead));
+//
+//  SEncoder encoder;
+//  tEncoderInit(&encoder, pBuf, tlen);
+//  if ((code = tEncodeStreamHbMsg(&encoder, &hbMsg)) < 0) {
+//    rpcFreeCont(buf);
+//    qError("vgId:%d encode stream hb msg failed, code:%s", pMeta->vgId, tstrerror(code));
+//    return;
+//  }
+//  tEncoderClear(&encoder);
+//
+//  SRpcMsg msg = {0};
+//  initRpcMsg(&msg, TDMT_MND_STREAM_HEARTBEAT, buf, tlen + sizeof(SMsgHead));
+//  qDebug("vgId:%d, send hb to mnode", nodeId);
+//
+//  tmsgSendReq(pEpSet, &msg);
+}
\ No newline at end of file