示例#1
0
 public void handleCompleteTransactionMessage(CompleteTransactionMessage message) {
   if (m_isLeader) {
     CompleteTransactionMessage replmsg = new CompleteTransactionMessage(message);
     // Set the spHandle so that on repair the new master will set the max seen spHandle
     // correctly
     advanceTxnEgo();
     replmsg.setSpHandle(getCurrentTxnId());
     if (m_sendToHSIds.length > 0) {
       m_mailbox.send(m_sendToHSIds, replmsg);
     }
   } else {
     setMaxSeenTxnId(message.getSpHandle());
   }
   TransactionState txn = m_outstandingTxns.get(message.getTxnId());
   // We can currently receive CompleteTransactionMessages for multipart procedures
   // which only use the buddy site (replicated table read).  Ignore them for
   // now, fix that later.
   if (txn != null) {
     Iv2Trace.logCompleteTransactionMessage(message, m_mailbox.getHSId());
     final CompleteTransactionTask task =
         new CompleteTransactionTask(txn, m_pendingTasks, message, m_drGateway);
     queueOrOfferMPTask(task);
     // If this is a restart, then we need to leave the transaction state around
     if (!message.isRestart()) {
       m_outstandingTxns.remove(message.getTxnId());
     }
   }
 }
示例#2
0
  // SpSchedulers will see FragmentTaskMessage for:
  // - The scatter fragment(s) of a multi-part transaction (normal or sysproc)
  // - Borrow tasks to do the local fragment work if this partition is the
  //   buddy of the MPI.  Borrow tasks may include input dependency tables for
  //   aggregation fragments, or not, if it's a replicated table read.
  // For multi-batch MP transactions, we'll need to look up the transaction state
  // that gets created when the first batch arrives.
  // During command log replay a new SP handle is going to be generated, but it really
  // doesn't matter, it isn't going to be used for anything.
  void handleFragmentTaskMessage(FragmentTaskMessage message) {
    FragmentTaskMessage msg = message;
    long newSpHandle;
    if (m_isLeader) {
      // Quick hack to make progress...we need to copy the FragmentTaskMessage
      // before we start mucking with its state (SPHANDLE).  We need to revisit
      // all the messaging mess at some point.
      msg =
          new FragmentTaskMessage(
              message.getInitiatorHSId(), message.getCoordinatorHSId(), message);
      // Not going to use the timestamp from the new Ego because the multi-part timestamp is what
      // should be used
      TxnEgo ego = advanceTxnEgo();
      newSpHandle = ego.getTxnId();
      msg.setSpHandle(newSpHandle);
      if (msg.getInitiateTask() != null) {
        msg.getInitiateTask().setSpHandle(newSpHandle); // set the handle
        msg.setInitiateTask(
            msg.getInitiateTask()); // Trigger reserialization so the new handle is used
      }

      /*
       * If there a replicas to send it to, forward it!
       * Unless... it's read only AND not a sysproc. Read only sysprocs may expect to be sent
       * everywhere.
       * In that case don't propagate it to avoid a determinism check and extra messaging overhead
       */
      if (m_sendToHSIds.length > 0 && (!msg.isReadOnly() || msg.isSysProcTask())) {
        FragmentTaskMessage replmsg =
            new FragmentTaskMessage(m_mailbox.getHSId(), m_mailbox.getHSId(), msg);
        m_mailbox.send(m_sendToHSIds, replmsg);
        DuplicateCounter counter;
        /*
         * Non-determinism should be impossible to happen with MP fragments.
         * if you see "MP_DETERMINISM_ERROR" as procedure name in the crash logs
         * something has horribly gone wrong.
         */
        if (message.getFragmentTaskType() != FragmentTaskMessage.SYS_PROC_PER_SITE) {
          counter =
              new DuplicateCounter(
                  msg.getCoordinatorHSId(), msg.getTxnId(), m_replicaHSIds, "MP_DETERMINISM_ERROR");
        } else {
          counter =
              new SysProcDuplicateCounter(
                  msg.getCoordinatorHSId(), msg.getTxnId(), m_replicaHSIds, "MP_DETERMINISM_ERROR");
        }
        m_duplicateCounters.put(new DuplicateCounterKey(msg.getTxnId(), newSpHandle), counter);
      }
    } else {
      newSpHandle = msg.getSpHandle();
      setMaxSeenTxnId(newSpHandle);
    }
    Iv2Trace.logFragmentTaskMessage(message, m_mailbox.getHSId(), newSpHandle, false);
    doLocalFragmentOffer(msg);
  }
示例#3
0
  // BorrowTaskMessages encapsulate a FragmentTaskMessage along with
  // input dependency tables. The MPI issues borrows to a local site
  // to perform replicated reads or aggregation fragment work.
  private void handleBorrowTaskMessage(BorrowTaskMessage message) {
    // borrows do not advance the sp handle. The handle would
    // move backwards anyway once the next message is received
    // from the SP leader.
    long newSpHandle = getCurrentTxnId();
    Iv2Trace.logFragmentTaskMessage(
        message.getFragmentTaskMessage(), m_mailbox.getHSId(), newSpHandle, true);
    TransactionState txn = m_outstandingTxns.get(message.getTxnId());

    if (txn == null) {
      // If the borrow is the first fragment for a transaction, run it as
      // a single partition fragment; Must not  engage/pause this
      // site on a MP transaction before the SP instructs to do so.
      // Do not track the borrow task as outstanding - it completes
      // immediately and is not a valid transaction state for
      // full MP participation (it claims everything can run as SP).
      txn = new BorrowTransactionState(newSpHandle, message);
    }

    if (message.getFragmentTaskMessage().isSysProcTask()) {
      final SysprocFragmentTask task =
          new SysprocFragmentTask(
              m_mailbox,
              (ParticipantTransactionState) txn,
              m_pendingTasks,
              message.getFragmentTaskMessage(),
              message.getInputDepMap());
      m_pendingTasks.offer(task);
    } else {
      final FragmentTask task =
          new FragmentTask(
              m_mailbox,
              (ParticipantTransactionState) txn,
              m_pendingTasks,
              message.getFragmentTaskMessage(),
              message.getInputDepMap());
      m_pendingTasks.offer(task);
    }
  }
示例#4
0
  // SpScheduler expects to see InitiateTaskMessages corresponding to single-partition
  // procedures only.
  public void handleIv2InitiateTaskMessage(Iv2InitiateTaskMessage message) {
    if (!message.isSinglePartition()) {
      throw new RuntimeException(
          "SpScheduler.handleIv2InitiateTaskMessage "
              + "should never receive multi-partition initiations.");
    }

    final String procedureName = message.getStoredProcedureName();
    long newSpHandle;
    long uniqueId = Long.MIN_VALUE;
    Iv2InitiateTaskMessage msg = message;
    if (m_isLeader || message.isReadOnly()) {
      /*
       * A short circuit read is a read where the client interface is local to
       * this node. The CI will let a replica perform a read in this case and
       * it does looser tracking of client handles since it can't be
       * partitioned from the local replica.
       */
      if (!m_isLeader
          && CoreUtils.getHostIdFromHSId(msg.getInitiatorHSId())
              != CoreUtils.getHostIdFromHSId(m_mailbox.getHSId())) {
        VoltDB.crashLocalVoltDB("Only allowed to do short circuit reads locally", true, null);
      }

      /*
       * If this is for CL replay or DR, update the unique ID generator
       */
      if (message.isForReplay()) {
        uniqueId = message.getUniqueId();
        try {
          m_uniqueIdGenerator.updateMostRecentlyGeneratedUniqueId(uniqueId);
        } catch (Exception e) {
          hostLog.fatal(e.getMessage());
          hostLog.fatal("Invocation: " + message);
          VoltDB.crashLocalVoltDB(e.getMessage(), true, e);
        }
      } else if (message.isForDR()) {
        uniqueId = message.getStoredProcedureInvocation().getOriginalUniqueId();
        // @LoadSinglepartitionTable does not have a valid uid
        if (UniqueIdGenerator.getPartitionIdFromUniqueId(uniqueId) == m_partitionId) {
          m_uniqueIdGenerator.updateMostRecentlyGeneratedUniqueId(uniqueId);
        }
      }

      /*
       * If this is CL replay use the txnid from the CL and also
       * update the txnid to match the one from the CL
       */
      if (message.isForReplay()) {
        newSpHandle = message.getTxnId();
        setMaxSeenTxnId(newSpHandle);
      } else if (m_isLeader) {
        TxnEgo ego = advanceTxnEgo();
        newSpHandle = ego.getTxnId();
        uniqueId = m_uniqueIdGenerator.getNextUniqueId();
      } else {
        /*
         * The short circuit read case. Since we are not a master
         * we can't create new transaction IDs, so reuse the last seen
         * txnid. For a timestamp, might as well give a reasonable one
         * for a read heavy workload so time isn't bursty.
         */
        uniqueId =
            UniqueIdGenerator.makeIdFromComponents(
                Math.max(System.currentTimeMillis(), m_uniqueIdGenerator.lastUsedTime),
                0,
                m_uniqueIdGenerator.partitionId);
        // Don't think it wise to make a new one for a short circuit read
        newSpHandle = getCurrentTxnId();
      }

      // Need to set the SP handle on the received message
      // Need to copy this or the other local sites handling
      // the same initiate task message will overwrite each
      // other's memory -- the message isn't copied on delivery
      // to other local mailboxes.
      msg =
          new Iv2InitiateTaskMessage(
              message.getInitiatorHSId(),
              message.getCoordinatorHSId(),
              m_repairLogTruncationHandle,
              message.getTxnId(),
              message.getUniqueId(),
              message.isReadOnly(),
              message.isSinglePartition(),
              message.getStoredProcedureInvocation(),
              message.getClientInterfaceHandle(),
              message.getConnectionId(),
              message.isForReplay());

      msg.setSpHandle(newSpHandle);

      // Also, if this is a vanilla single-part procedure, make the TXNID
      // be the SpHandle (for now)
      // Only system procedures are every-site, so we'll check through the SystemProcedureCatalog
      if (SystemProcedureCatalog.listing.get(procedureName) == null
          || !SystemProcedureCatalog.listing.get(procedureName).getEverysite()) {
        msg.setTxnId(newSpHandle);
        msg.setUniqueId(uniqueId);
      }

      // Don't replicate reads, this really assumes that DML validation
      // is going to be integrated soonish
      if (m_isLeader && !msg.isReadOnly() && m_sendToHSIds.length > 0) {
        Iv2InitiateTaskMessage replmsg =
            new Iv2InitiateTaskMessage(
                m_mailbox.getHSId(),
                m_mailbox.getHSId(),
                m_repairLogTruncationHandle,
                msg.getTxnId(),
                msg.getUniqueId(),
                msg.isReadOnly(),
                msg.isSinglePartition(),
                msg.getStoredProcedureInvocation(),
                msg.getClientInterfaceHandle(),
                msg.getConnectionId(),
                msg.isForReplay());
        // Update the handle in the copy since the constructor doesn't set it
        replmsg.setSpHandle(newSpHandle);
        m_mailbox.send(m_sendToHSIds, replmsg);
        DuplicateCounter counter =
            new DuplicateCounter(
                msg.getInitiatorHSId(),
                msg.getTxnId(),
                m_replicaHSIds,
                msg.getStoredProcedureName());
        m_duplicateCounters.put(new DuplicateCounterKey(msg.getTxnId(), newSpHandle), counter);
      }
    } else {
      setMaxSeenTxnId(msg.getSpHandle());
      newSpHandle = msg.getSpHandle();
      uniqueId = msg.getUniqueId();
    }
    Iv2Trace.logIv2InitiateTaskMessage(message, m_mailbox.getHSId(), msg.getTxnId(), newSpHandle);
    doLocalInitiateOffer(msg);
    return;
  }