fix:set task status killed when vnode receive subscribe msg from mnode

source/dnode/vnode/src/tq/tq.c

@@ -367,6 +367,20 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg) {
       return -1;
     }
 
+    // 3. update the epoch value
+    int32_t savedEpoch = pHandle->epoch;
+    if (savedEpoch <= reqEpoch) {
+      tqDebug("tmq poll: consumer:0x%" PRIx64 " epoch update from %d to %d by poll req", consumerId, savedEpoch,
+              reqEpoch);
+      pHandle->epoch = reqEpoch;
+    }else {
+      tqDebug("ERROR tmq poll: consumer:0x%" PRIx64 " vgId:%d, subkey %s, savedEpoch:%d > reqEpoch:%d ",
+              consumerId, TD_VID(pTq->pVnode), req.subKey, savedEpoch, reqEpoch);
+      terrno = TSDB_CODE_TMQ_CONSUMER_MISMATCH;
+      taosWUnLockLatch(&pTq->lock);
+      return -1;
+    }
+
     bool exec = tqIsHandleExec(pHandle);
     if(!exec) {
       tqSetHandleExec(pHandle);
@@ -381,14 +395,6 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg) {
     taosMsleep(10);
   }
 
-  // 3. update the epoch value
-  int32_t savedEpoch = pHandle->epoch;
-  if (savedEpoch < reqEpoch) {
-    tqDebug("tmq poll: consumer:0x%" PRIx64 " epoch update from %d to %d by poll req", consumerId, savedEpoch,
-            reqEpoch);
-    pHandle->epoch = reqEpoch;
-  }
-
   char buf[80];
   tFormatOffset(buf, 80, &reqOffset);
   tqDebug("tmq poll: consumer:0x%" PRIx64 " (epoch %d), subkey %s, recv poll req vgId:%d, req:%s, reqId:0x%" PRIx64,
@@ -396,6 +402,7 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg) {
 
   code = tqExtractDataForMq(pTq, pHandle, &req, pMsg);
   tqSetHandleIdle(pHandle);
+
   tqDebug("tmq poll: consumer:0x%" PRIx64 "vgId:%d, topic:%s, , set handle idle, pHandle:%p", consumerId, vgId, req.subKey, pHandle);
   return code;
 }
@@ -561,17 +568,17 @@ int32_t tqProcessSubscribeReq(STQ* pTq, int64_t sversion, char* msg, int32_t msg
     ret = tqMetaSaveHandle(pTq, req.subKey, pHandle);
     goto end;
   } else {
+    taosWLockLatch(&pTq->lock);
+
     if (pHandle->consumerId == req.newConsumerId) {  // do nothing
       tqInfo("vgId:%d consumer:0x%" PRIx64 " remains, no switch occurs, should not reach here", req.vgId, req.newConsumerId);
-//      atomic_add_fetch_32(&pHandle->epoch, 1);
     } else {
       tqInfo("vgId:%d switch consumer from Id:0x%" PRIx64 " to Id:0x%" PRIx64, req.vgId, pHandle->consumerId,
              req.newConsumerId);
       atomic_store_64(&pHandle->consumerId, req.newConsumerId);
-//      atomic_store_32(&pHandle->epoch, 0);
     }
+    atomic_add_fetch_32(&pHandle->epoch, 1);
 
-    taosWLockLatch(&pTq->lock);
     // kill executing task
     if(tqIsHandleExec(pHandle)) {
       qTaskInfo_t pTaskInfo = pHandle->execHandle.task;