Examples with PeerId io.dingodb.raft.entity.PeerId used on opensource projects

Example 56 with PeerId

use of io.dingodb.raft.entity.PeerId in project dingo by dingodb.

the class FSMCallerImpl method doSnapshotSave.

private void doSnapshotSave(final SaveSnapshotClosure done) {
    Requires.requireNonNull(done, "SaveSnapshotClosure is null");
    final long lastAppliedIndex = this.lastAppliedIndex.get();
    final RaftOutter.SnapshotMeta.Builder metaBuilder = // 
    RaftOutter.SnapshotMeta.newBuilder().setLastIncludedIndex(// 
    lastAppliedIndex).setLastIncludedTerm(this.lastAppliedTerm);
    final ConfigurationEntry confEntry = this.logManager.getConfiguration(lastAppliedIndex);
    if (confEntry == null || confEntry.isEmpty()) {
        LOG.error("Empty conf entry for lastAppliedIndex={}", lastAppliedIndex);
        Utils.runClosureInThread(done, new Status(RaftError.EINVAL, "Empty conf entry for lastAppliedIndex=%s", lastAppliedIndex));
        return;
    }
    for (final PeerId peer : confEntry.getConf()) {
        metaBuilder.addPeers(peer.toString());
    }
    for (final PeerId peer : confEntry.getConf().getLearners()) {
        metaBuilder.addLearners(peer.toString());
    }
    if (confEntry.getOldConf() != null) {
        for (final PeerId peer : confEntry.getOldConf()) {
            metaBuilder.addOldPeers(peer.toString());
        }
        for (final PeerId peer : confEntry.getOldConf().getLearners()) {
            metaBuilder.addOldLearners(peer.toString());
        }
    }
    final SnapshotWriter writer = done.start(metaBuilder.build());
    if (writer == null) {
        done.run(new Status(RaftError.EINVAL, "snapshot_storage create SnapshotWriter failed"));
        return;
    }
    this.fsm.onSnapshotSave(writer, done);
}

Example 57 with PeerId

use of io.dingodb.raft.entity.PeerId in project dingo by dingodb.

the class NodeImpl method removeLearners.

@Override
public void removeLearners(final List<PeerId> learners, final Closure done) {
    checkPeers(learners);
    this.writeLock.lock();
    try {
        final Configuration newConf = new Configuration(this.conf.getConf());
        for (final PeerId peer : learners) {
            newConf.removeLearner(peer);
        }
        unsafeRegisterConfChange(this.conf.getConf(), newConf, done);
    } finally {
        this.writeLock.unlock();
    }
}

Example 58 with PeerId

use of io.dingodb.raft.entity.PeerId in project dingo by dingodb.

the class NodeImpl method transferLeadershipTo.

@Override
public Status transferLeadershipTo(final PeerId peer) {
    Requires.requireNonNull(peer, "Null peer");
    this.writeLock.lock();
    try {
        if (this.state != State.STATE_LEADER) {
            LOG.warn("Node {} can't transfer leadership to peer {} as it is in state {}.", getNodeId(), peer, this.state);
            return new Status(this.state == State.STATE_TRANSFERRING ? RaftError.EBUSY : RaftError.EPERM, "Not a leader");
        }
        if (this.confCtx.isBusy()) {
            // It's very messy to deal with the case when the |peer| received
            // TimeoutNowRequest and increase the term while somehow another leader
            // which was not replicated with the newest configuration has been
            // elected. If no add_peer with this very |peer| is to be invoked ever
            // after nor this peer is to be killed, this peer will spin in the voting
            // procedure and make the each new leader stepped down when the peer
            // reached vote timeout and it starts to vote (because it will increase
            // the term of the group)
            // To make things simple, refuse the operation and force users to
            // invoke transfer_leadership_to after configuration changing is
            // completed so that the peer's configuration is up-to-date when it
            // receives the TimeOutNowRequest.
            LOG.warn("Node {} refused to transfer leadership to peer {} when the leader is changing the configuration.", getNodeId(), peer);
            return new Status(RaftError.EBUSY, "Changing the configuration");
        }
        PeerId peerId = peer.copy();
        // last_log_id will be selected.
        if (peerId.equals(PeerId.ANY_PEER)) {
            LOG.info("Node {} starts to transfer leadership to any peer.", getNodeId());
            if ((peerId = this.replicatorGroup.findTheNextCandidate(this.conf)) == null) {
                return new Status(-1, "Candidate not found for any peer");
            }
        }
        if (peerId.equals(this.serverId)) {
            LOG.info("Node {} transferred leadership to self.", this.serverId);
            return Status.OK();
        }
        if (!this.conf.contains(peerId)) {
            LOG.info("Node {} refused to transfer leadership to peer {} as it is not in {}.", getNodeId(), peer, this.conf);
            return new Status(RaftError.EINVAL, "Not in current configuration");
        }
        final long lastLogIndex = this.logManager.getLastLogIndex();
        if (!this.replicatorGroup.transferLeadershipTo(peerId, lastLogIndex)) {
            LOG.warn("No such peer {}.", peer);
            return new Status(RaftError.EINVAL, "No such peer %s", peer);
        }
        this.state = State.STATE_TRANSFERRING;
        final Status status = new Status(RaftError.ETRANSFERLEADERSHIP, "Raft leader is transferring leadership to %s", peerId);
        onLeaderStop(status);
        LOG.info("Node {} starts to transfer leadership to peer {}.", getNodeId(), peer);
        final StopTransferArg stopArg = new StopTransferArg(this, this.currTerm, peerId);
        this.stopTransferArg = stopArg;
        this.transferTimer = this.timerManager.schedule(() -> onTransferTimeout(stopArg), this.options.getElectionTimeoutMs(), TimeUnit.MILLISECONDS);
    } finally {
        this.writeLock.unlock();
    }
    return Status.OK();
}

Example 59 with PeerId

use of io.dingodb.raft.entity.PeerId in project dingo by dingodb.

the class NodeImpl method getAliveNodes.

// in read_lock
private List<PeerId> getAliveNodes(final Collection<PeerId> peers, final long monotonicNowMs) {
    final int leaderLeaseTimeoutMs = this.options.getLeaderLeaseTimeoutMs();
    final List<PeerId> alivePeers = new ArrayList<>();
    for (final PeerId peer : peers) {
        if (peer.equals(this.serverId)) {
            alivePeers.add(peer.copy());
            continue;
        }
        if (monotonicNowMs - this.replicatorGroup.getLastRpcSendTimestamp(peer) <= leaderLeaseTimeoutMs) {
            alivePeers.add(peer.copy());
        }
    }
    return alivePeers;
}

Example 60 with PeerId

use of io.dingodb.raft.entity.PeerId in project dingo by dingodb.

the class NodeImpl method checkDeadNodes0.

private boolean checkDeadNodes0(final List<PeerId> peers, final long monotonicNowMs, final boolean checkReplicator, final Configuration deadNodes) {
    final int leaderLeaseTimeoutMs = this.options.getLeaderLeaseTimeoutMs();
    int aliveCount = 0;
    long startLease = Long.MAX_VALUE;
    for (final PeerId peer : peers) {
        if (peer.equals(this.serverId)) {
            aliveCount++;
            continue;
        }
        if (checkReplicator) {
            checkReplicator(peer);
        }
        final long lastRpcSendTimestamp = this.replicatorGroup.getLastRpcSendTimestamp(peer);
        if (monotonicNowMs - lastRpcSendTimestamp <= leaderLeaseTimeoutMs) {
            aliveCount++;
            if (startLease > lastRpcSendTimestamp) {
                startLease = lastRpcSendTimestamp;
            }
            continue;
        }
        if (deadNodes != null) {
            deadNodes.addPeer(peer);
        }
    }
    if (aliveCount >= peers.size() / 2 + 1) {
        updateLastLeaderTimestamp(startLease);
        return true;
    }
    return false;
}