示例#1
0
文件: Site.java 项目: sumitk1/voltdb
  @Override
  public void setRejoinComplete(RejoinProducer.ReplayCompletionAction replayComplete) {
    // transition from kStateRejoining to live rejoin replay.
    // pass through this transition in all cases; if not doing
    // live rejoin, will transfer to kStateRunning as usual
    // as the rejoin task log will be empty.
    assert (m_rejoinState == kStateRejoining);

    if (replayComplete == null) {
      throw new RuntimeException("Null Replay Complete Action.");
    }

    m_rejoinState = kStateReplayingRejoin;
    m_replayCompletionAction = replayComplete;
    if (m_rejoinTaskLog != null) {
      m_rejoinTaskLog.setEarliestTxnId(m_replayCompletionAction.getSnapshotTxnId());
    }
  }
  @Override
  public void runForRejoin(SiteProcedureConnection siteConnection, TaskLog taskLog)
      throws IOException {
    if (!m_txnState.isReadOnly() && !m_completeMsg.isRollback()) {
      // ENG-5276: Need to set the last committed spHandle so that the rejoining site gets the
      // accurate
      // per-partition txnId set for the next snapshot. Normally, this is done through undo log
      // truncation.
      // Since the task is not run here, we need to set the last committed spHandle explicitly.
      //
      // How does this work?
      // - Blocking rejoin with idle cluster: The spHandle is updated here with the spHandle of the
      // stream
      //   snapshot that transfers the rejoin data. So the snapshot right after rejoin should have
      // the spHandle
      //   passed here.
      // - Live rejoin with idle cluster: Same as blocking rejoin.
      // - Live rejoin with workload: Transactions will be logged and replayed afterward. The
      // spHandle will be
      //   updated when they commit and truncate undo logs. So at the end of replay,
      //   the spHandle should have the latest value. If all replayed transactions rolled back,
      //   the spHandle is still guaranteed to be the spHandle of the stream snapshot that
      // transfered the
      //   rejoin data, which is the correct value.
      siteConnection.setSpHandleForSnapshotDigest(m_txnState.m_spHandle);
    }

    if (!m_completeMsg.isRestart()) {
      // future: offer to siteConnection.IBS for replay.
      doCommonSPICompleteActions();
    }

    if (!m_txnState.isReadOnly()) {
      // We need to log the restarting message to the task log so we'll replay the whole
      // stream faithfully
      taskLog.logTask(m_completeMsg);
    }

    final CompleteTransactionResponseMessage resp =
        new CompleteTransactionResponseMessage(m_completeMsg);
    resp.setIsRecovering(true);
    resp.m_sourceHSId = m_initiator.getHSId();
    m_initiator.deliver(resp);
  }
示例#3
0
文件: Site.java 项目: sumitk1/voltdb
  void replayFromTaskLog() throws IOException {
    // not yet time to catch-up.
    if (m_rejoinState != kStateReplayingRejoin) {
      return;
    }

    // replay 10:1 in favor of replay
    for (int i = 0; i < 10; ++i) {
      if (m_rejoinTaskLog.isEmpty()) {
        break;
      }

      TransactionInfoBaseMessage tibm = m_rejoinTaskLog.getNextMessage();
      if (tibm == null) {
        break;
      }

      // Apply the readonly / sysproc filter. With Iv2 read optimizations,
      // reads should not reach here; the cost of post-filtering shouldn't
      // be particularly high (vs pre-filtering).
      if (filter(tibm)) {
        continue;
      }

      if (tibm instanceof Iv2InitiateTaskMessage) {
        Iv2InitiateTaskMessage m = (Iv2InitiateTaskMessage) tibm;
        SpProcedureTask t =
            new SpProcedureTask(m_initiatorMailbox, m.getStoredProcedureName(), null, m, null);
        t.runFromTaskLog(this);
      } else if (tibm instanceof FragmentTaskMessage) {
        FragmentTaskMessage m = (FragmentTaskMessage) tibm;
        if (global_replay_mpTxn == null) {
          global_replay_mpTxn = new ParticipantTransactionState(m.getTxnId(), m);
        } else if (global_replay_mpTxn.txnId != m.getTxnId()) {
          VoltDB.crashLocalVoltDB(
              "Started a MP transaction during replay before completing " + " open transaction.",
              false,
              null);
        }
        FragmentTask t = new FragmentTask(m_initiatorMailbox, m, global_replay_mpTxn);
        t.runFromTaskLog(this);
      } else if (tibm instanceof CompleteTransactionMessage) {
        // Needs improvement: completes for sysprocs aren't filterable as sysprocs.
        // Only complete transactions that are open...
        if (global_replay_mpTxn != null) {
          CompleteTransactionMessage m = (CompleteTransactionMessage) tibm;
          CompleteTransactionTask t =
              new CompleteTransactionTask(global_replay_mpTxn, null, m, null);
          if (!m.isRestart()) {
            global_replay_mpTxn = null;
          }
          t.runFromTaskLog(this);
        }
      } else {
        VoltDB.crashLocalVoltDB(
            "Can not replay message type " + tibm + " during live rejoin. Unexpected error.",
            false,
            null);
      }
    }

    // exit replay being careful not to exit in the middle of a multi-partititon
    // transaction. The SPScheduler doesn't have a valid transaction state for a
    // partially replayed MP txn and in case of rollback the scheduler's undo token
    // is wrong. Run MP txns fully kStateRejoining or fully kStateRunning.
    if (m_rejoinTaskLog.isEmpty() && global_replay_mpTxn == null) {
      setReplayRejoinComplete();
    }
  }