fix(tmq): update the epset when the leader of vnode changed.

include/common/tmisce.h

@@ -27,13 +27,14 @@ typedef struct SCorEpSet {
   SEpSet  epSet;
 } SCorEpSet;
 
+#define GET_ACTIVE_EP(_eps) (&((_eps)->eps[(_eps)->inUse]))
 int32_t taosGetFqdnPortFromEp(const char* ep, SEp* pEp);
 void    addEpIntoEpSet(SEpSet* pEpSet, const char* fqdn, uint16_t port);
 
-bool isEpsetEqual(const SEpSet* s1, const SEpSet* s2);
-
-void   updateEpSet_s(SCorEpSet* pEpSet, SEpSet* pNewEpSet);
-SEpSet getEpSet_s(SCorEpSet* pEpSet);
+bool    isEpsetEqual(const SEpSet* s1, const SEpSet* s2);
+void    epsetAssign(SEpSet* dst, const SEpSet* pSrc);
+void    updateEpSet_s(SCorEpSet* pEpSet, SEpSet* pNewEpSet);
+SEpSet  getEpSet_s(SCorEpSet* pEpSet);
 
 #ifdef __cplusplus
 }

include/common/tmsg.h

@@ -1830,7 +1830,7 @@ typedef struct {
 } SMqConsumerLostMsg, SMqConsumerRecoverMsg, SMqConsumerClearMsg;
 
 typedef struct {
-  uint64_t consumerId;
+  int64_t  consumerId;
   char     cgroup[TSDB_CGROUP_LEN];
   char     clientId[256];
   SArray*  topicNames;  // SArray<char**>

source/client/src/clientTmq.c

@@ -58,15 +58,14 @@ struct tmq_list_t {
 };
 
 struct tmq_conf_t {
-  char    clientId[256];
-  char    groupId[TSDB_CGROUP_LEN];
-  int8_t  autoCommit;
-  int8_t  resetOffset;
-  int8_t  withTbName;
-  int8_t  snapEnable;
-  int32_t snapBatchSize;
-  bool    hbBgEnable;
-
+  char           clientId[256];
+  char           groupId[TSDB_CGROUP_LEN];
+  int8_t         autoCommit;
+  int8_t         resetOffset;
+  int8_t         withTbName;
+  int8_t         snapEnable;
+  int32_t        snapBatchSize;
+  bool           hbBgEnable;
   uint16_t       port;
   int32_t        autoCommitInterval;
   char*          ip;
@@ -213,6 +212,7 @@ typedef struct {
 typedef struct {
   SMqCommitCbParamSet* params;
   STqOffset*           pOffset;
+  SMqClientVg*         pMqVg;
   /*char                 topicName[TSDB_TOPIC_FNAME_LEN];*/
   /*int32_t              vgId;*/
 } SMqCommitCbParam;
@@ -440,6 +440,17 @@ int32_t tmqCommitCb(void* param, SDataBuf* pBuf, int32_t code) {
   }
 #endif
 
+  // there may be race condition. fix it
+  if (pBuf->pEpSet != NULL && pParam->pMqVg != NULL) {
+    SMqClientVg* pMqVg = pParam->pMqVg;
+
+    SEp* pEp = GET_ACTIVE_EP(pBuf->pEpSet);
+    SEp* pOld = GET_ACTIVE_EP(&(pMqVg->epSet));
+    uDebug("subKey:%s update the epset vgId:%d, ep:%s:%d, old ep:%s:%d", pParam->pOffset->subKey, pMqVg->vgId,
+           pEp->fqdn, pEp->port, pOld->fqdn, pOld->port);
+    pParam->pMqVg->epSet = *pBuf->pEpSet;
+  }
+
   taosMemoryFree(pParam->pOffset);
   taosMemoryFree(pBuf->pData);
   taosMemoryFree(pBuf->pEpSet);
@@ -448,7 +459,6 @@ int32_t tmqCommitCb(void* param, SDataBuf* pBuf, int32_t code) {
    * pOffset->version);*/
 
   tmqCommitRspCountDown(pParamSet);
-
   return 0;
 }
 
@@ -498,6 +508,7 @@ static int32_t tmqSendCommitReq(tmq_t* tmq, SMqClientVg* pVg, SMqClientTopic* pT
 
   pParam->params = pParamSet;
   pParam->pOffset = pOffset;
+  pParam->pMqVg = pVg;  // there may be an race condition
 
   // build send info
   SMsgSendInfo* pMsgSendInfo = taosMemoryCalloc(1, sizeof(SMsgSendInfo));
@@ -518,7 +529,7 @@ static int32_t tmqSendCommitReq(tmq_t* tmq, SMqClientVg* pVg, SMqClientTopic* pT
   tscDebug("consumer:0x%" PRIx64 " topic:%s on vgId:%d offset:%" PRId64" prev:%"PRId64", ep:%s:%d", tmq->consumerId, pOffset->subKey,
            pVg->vgId, pOffset->val.version, pVg->committedOffset.version, pEp->fqdn, pEp->port);
 
-  // TODO: put into cb
+  // TODO: put into cb, the commit offset should be move to the callback function
   pVg->committedOffset = pVg->currentOffset;
 
   pMsgSendInfo->requestId = generateRequestId();

source/common/src/tmisce.c

@@ -60,6 +60,19 @@ bool isEpsetEqual(const SEpSet* s1, const SEpSet* s2) {
   return true;
 }
 
+void epsetAssign(SEpSet* pDst, const SEpSet* pSrc) {
+  if (pSrc == NULL || pDst == NULL) {
+      return;
+  }
+
+  pDst->inUse = pSrc->inUse;
+  pDst->numOfEps = pSrc->numOfEps;
+  for (int32_t i = 0; i < pSrc->numOfEps; ++i) {
+    pDst->eps[i].port = pSrc->eps[i].port;
+    tstrncpy(pDst->eps[i].fqdn, pSrc->eps[i].fqdn, tListLen(pSrc->eps[i].fqdn));
+  }
+}
+
 void updateEpSet_s(SCorEpSet* pEpSet, SEpSet* pNewEpSet) {
   taosCorBeginWrite(&pEpSet->version);
   pEpSet->epSet = *pNewEpSet;

source/dnode/mnode/impl/src/mndConsumer.c

@@ -413,7 +413,7 @@ static int32_t mndProcessAskEpReq(SRpcMsg *pMsg) {
 
   int32_t serverEpoch = atomic_load_32(&pConsumer->epoch);
 
-  // 2. check epoch, only send ep info when epoches do not match
+  // 2. check epoch, only send ep info when epochs do not match
   if (epoch != serverEpoch) {
     taosRLockLatch(&pConsumer->lock);
     mInfo("process ask ep, consumer:%" PRId64 "(epoch %d), server epoch %d", consumerId, epoch, serverEpoch);

source/libs/transport/src/transCli.c

@@ -2303,6 +2303,7 @@ int transSendRequest(void* shandle, const SEpSet* pEpSet, STransMsg* pReq, STran
 
   STransConnCtx* pCtx = taosMemoryCalloc(1, sizeof(STransConnCtx));
   pCtx->epSet = *pEpSet;
+  pCtx->origEpSet = *pEpSet;
   pCtx->ahandle = pReq->info.ahandle;
   pCtx->msgType = pReq->msgType;