fix: update commit index from heartbeat on learner in the same way as on follower

source/libs/sync/src/syncMain.c

@@ -2414,18 +2414,19 @@ int32_t syncNodeOnHeartbeat(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
       (void)syncBuildLocalCmd(&rpcMsgLocalCmd, ths->vgId);
 
       SyncLocalCmd* pSyncMsg = rpcMsgLocalCmd.pCont;
-      pSyncMsg->cmd = SYNC_LOCAL_CMD_FOLLOWER_CMT;
+      pSyncMsg->cmd =
+          (ths->state == TAOS_SYNC_STATE_LEARNER) ? SYNC_LOCAL_CMD_LEARNER_CMT : SYNC_LOCAL_CMD_FOLLOWER_CMT;
       pSyncMsg->commitIndex = pMsg->commitIndex;
       pSyncMsg->currentTerm = pMsg->term;
-      SyncIndex fcIndex = pSyncMsg->commitIndex;
 
       if (ths->syncEqMsg != NULL && ths->msgcb != NULL) {
         int32_t code = ths->syncEqMsg(ths->msgcb, &rpcMsgLocalCmd);
         if (code != 0) {
-          sError("vgId:%d, sync enqueue fc-commit msg error, code:%d", ths->vgId, code);
+          sError("vgId:%d, failed to enqueue commit msg from heartbeat since %s, code:%d", ths->vgId, terrstr(), code);
           rpcFreeCont(rpcMsgLocalCmd.pCont);
         } else {
-          sTrace("vgId:%d, sync enqueue fc-commit msg, fc-index:%" PRId64, ths->vgId, fcIndex);
+          sTrace("vgId:%d, enqueue commit msg from heartbeat, commit-index:%" PRId64 ", term:%" PRId64, ths->vgId,
+                 pMsg->commitIndex, pMsg->term);
         }
       }
     }
@@ -2451,26 +2452,6 @@ int32_t syncNodeOnHeartbeat(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
     }
   }
 
-  if (pMsg->term >= currentTerm && ths->state == TAOS_SYNC_STATE_LEARNER) {
-    SRpcMsg rpcMsgLocalCmd = {0};
-    (void)syncBuildLocalCmd(&rpcMsgLocalCmd, ths->vgId);
-
-    SyncLocalCmd* pSyncMsg = rpcMsgLocalCmd.pCont;
-    pSyncMsg->cmd = SYNC_LOCAL_CMD_LEARNER_CMT;
-    pSyncMsg->currentTerm = pMsg->term;
-    pSyncMsg->commitIndex = pMsg->commitIndex;
-
-    if (ths->syncEqMsg != NULL && ths->msgcb != NULL) {
-      int32_t code = ths->syncEqMsg(ths->msgcb, &rpcMsgLocalCmd);
-      if (code != 0) {
-        sError("vgId:%d, sync enqueue step-down msg error, code:%d", ths->vgId, code);
-        rpcFreeCont(rpcMsgLocalCmd.pCont);
-      } else {
-        sTrace("vgId:%d, sync enqueue step-down msg, new-term:%" PRId64, ths->vgId, pMsg->term);
-      }
-    }
-  }
-
   // reply
   syncNodeSendMsgById(&pMsgReply->destId, ths, &rpcMsg);
 
@@ -2521,7 +2502,7 @@ int32_t syncNodeOnLocalCmd(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
   if (pMsg->cmd == SYNC_LOCAL_CMD_STEP_DOWN) {
     syncNodeStepDown(ths, pMsg->currentTerm);
 
-  } else if (pMsg->cmd == SYNC_LOCAL_CMD_FOLLOWER_CMT) {
+  } else if (pMsg->cmd == SYNC_LOCAL_CMD_FOLLOWER_CMT || pMsg->cmd == SYNC_LOCAL_CMD_LEARNER_CMT) {
     if (syncLogBufferIsEmpty(ths->pLogBuf)) {
       sError("vgId:%d, sync log buffer is empty.", ths->vgId);
       return 0;
@@ -2534,20 +2515,7 @@ int32_t syncNodeOnLocalCmd(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
       sError("vgId:%d, failed to commit raft log since %s. commit index:%" PRId64 "", ths->vgId, terrstr(),
              ths->commitIndex);
     }
-  } else if (pMsg->cmd == SYNC_LOCAL_CMD_LEARNER_CMT){
-    if (syncLogBufferIsEmpty(ths->pLogBuf)) {
-      sError("vgId:%d, sync log buffer is empty.", ths->vgId);
-      return 0;
-    }
-    raftStoreSetTerm(ths, pMsg->currentTerm);
-    (void)syncNodeUpdateCommitIndex(ths, pMsg->commitIndex);
-    sTrace("vgId:%d, start to commit raft log in heartbeat. commit index:%" PRId64 "", ths->vgId, ths->commitIndex);
-    if (syncLogBufferCommit(ths->pLogBuf, ths, ths->commitIndex) < 0) {
-      sError("vgId:%d, failed to commit raft log since %s. commit index:%" PRId64 "", ths->vgId, terrstr(),
-             ths->commitIndex);
-    }
-  }
-  else {
+  } else {
     sError("error local cmd");
   }