[Zen2] Implement basic cluster formation (#33668)
This PR integrates the following pieces of machinery in the Coordinator: - discovery - pre-voting - randomised election scheduling - joining (of a new master) - publication of cluster state updates Together, these things are everything needed to form a cluster. We therefore also add the start of a test suite that allows us to assert higher-level properties of the interactions between all these pieces of machinery, with as little fake behaviour as possible. We assert one such property: "a cluster successfully forms".
This commit is contained in:
David Turner
GitHub
parent
01b3be917a
commit
c79fbea923
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@ -49,6 +49,7 @@ public class ApplyCommitRequest extends TermVersionRequest {
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return "ApplyCommitRequest{" +
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"term=" + term +
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", version=" + version +
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", sourceNode=" + sourceNode +
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'}';
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}
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}
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@ -19,18 +19,35 @@
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package org.elasticsearch.cluster.coordination;
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import org.apache.lucene.util.SetOnce;
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import org.elasticsearch.cluster.ClusterState;
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import org.elasticsearch.cluster.node.DiscoveryNode;
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import org.elasticsearch.cluster.routing.allocation.AllocationService;
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import org.elasticsearch.cluster.service.MasterService;
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import org.elasticsearch.common.Nullable;
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import org.elasticsearch.common.Randomness;
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import org.elasticsearch.common.component.AbstractLifecycleComponent;
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import org.elasticsearch.common.lease.Releasable;
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import org.elasticsearch.common.settings.Settings;
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import org.elasticsearch.common.unit.TimeValue;
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import org.elasticsearch.discovery.HandshakingTransportAddressConnector;
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import org.elasticsearch.discovery.PeerFinder;
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import org.elasticsearch.discovery.UnicastConfiguredHostsResolver;
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import org.elasticsearch.discovery.zen.UnicastHostsProvider;
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import org.elasticsearch.threadpool.ThreadPool.Names;
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import org.elasticsearch.transport.TransportResponse.Empty;
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import org.elasticsearch.transport.TransportService;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Optional;
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import java.util.concurrent.atomic.AtomicLong;
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import java.util.function.Supplier;
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public class Coordinator extends AbstractLifecycleComponent {
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public static final String PUBLISH_STATE_ACTION_NAME = "internal:cluster/coordination/publish_state";
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public static final String COMMIT_STATE_ACTION_NAME = "internal:cluster/coordination/commit_state";
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private final TransportService transportService;
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private final JoinHelper joinHelper;
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private final Supplier<CoordinationState.PersistedState> persistedStateSupplier;
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@ -38,6 +55,17 @@ public class Coordinator extends AbstractLifecycleComponent {
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// These tests can be rewritten to use public methods once Coordinator is more feature-complete
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final Object mutex = new Object();
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final SetOnce<CoordinationState> coordinationState = new SetOnce<>(); // initialized on start-up (see doStart)
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private volatile Optional<ClusterState> lastCommittedState = Optional.empty();
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private final PeerFinder peerFinder;
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private final PreVoteCollector preVoteCollector;
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private final ElectionSchedulerFactory electionSchedulerFactory;
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private final UnicastConfiguredHostsResolver configuredHostsResolver;
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@Nullable
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private Releasable electionScheduler;
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@Nullable
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private Releasable prevotingRound;
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private AtomicLong maxTermSeen = new AtomicLong();
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private Mode mode;
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private Optional<DiscoveryNode> lastKnownLeader;
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@ -45,15 +73,99 @@ public class Coordinator extends AbstractLifecycleComponent {
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private JoinHelper.JoinAccumulator joinAccumulator;
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public Coordinator(Settings settings, TransportService transportService, AllocationService allocationService,
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MasterService masterService, Supplier<CoordinationState.PersistedState> persistedStateSupplier) {
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MasterService masterService, Supplier<CoordinationState.PersistedState> persistedStateSupplier,
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UnicastHostsProvider unicastHostsProvider) {
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super(settings);
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this.transportService = transportService;
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this.joinHelper = new JoinHelper(settings, allocationService, masterService, transportService,
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this::getCurrentTerm, this::handleJoinRequest);
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this::getCurrentTerm, this::handleJoinRequest, this::joinLeaderInTerm);
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this.persistedStateSupplier = persistedStateSupplier;
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this.lastKnownLeader = Optional.empty();
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this.lastJoin = Optional.empty();
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this.joinAccumulator = joinHelper.new CandidateJoinAccumulator();
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this.electionSchedulerFactory = new ElectionSchedulerFactory(settings, Randomness.get(), transportService.getThreadPool());
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this.preVoteCollector = new PreVoteCollector(settings, transportService, this::startElection, this::updateMaxTermSeen);
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configuredHostsResolver = new UnicastConfiguredHostsResolver(settings, transportService, unicastHostsProvider);
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this.peerFinder = new CoordinatorPeerFinder(settings, transportService,
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new HandshakingTransportAddressConnector(settings, transportService), configuredHostsResolver);
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transportService.registerRequestHandler(PUBLISH_STATE_ACTION_NAME, Names.GENERIC, false, false,
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in -> new PublishRequest(in, transportService.getLocalNode()),
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(request, channel, task) -> channel.sendResponse(handlePublishRequest(request)));
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transportService.registerRequestHandler(COMMIT_STATE_ACTION_NAME, Names.GENERIC, false, false,
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ApplyCommitRequest::new,
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(request, channel, task) -> {
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handleApplyCommit(request);
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channel.sendResponse(Empty.INSTANCE);
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});
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}
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private void handleApplyCommit(ApplyCommitRequest applyCommitRequest) {
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synchronized (mutex) {
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logger.trace("handleApplyCommit: applying commit {}", applyCommitRequest);
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coordinationState.get().handleCommit(applyCommitRequest);
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lastCommittedState = Optional.of(coordinationState.get().getLastAcceptedState());
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}
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}
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private PublishWithJoinResponse handlePublishRequest(PublishRequest publishRequest) {
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synchronized (mutex) {
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final DiscoveryNode sourceNode = publishRequest.getAcceptedState().nodes().getMasterNode();
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logger.trace("handlePublishRequest: handling [{}] from [{}]", publishRequest, sourceNode);
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ensureTermAtLeast(sourceNode, publishRequest.getAcceptedState().term());
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final PublishResponse publishResponse = coordinationState.get().handlePublishRequest(publishRequest);
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if (sourceNode.equals(getLocalNode()) == false) {
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becomeFollower("handlePublishRequest", sourceNode);
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}
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return new PublishWithJoinResponse(publishResponse,
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joinWithDestination(lastJoin, sourceNode, publishRequest.getAcceptedState().term()));
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}
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}
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private static Optional<Join> joinWithDestination(Optional<Join> lastJoin, DiscoveryNode leader, long term) {
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if (lastJoin.isPresent()
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&& lastJoin.get().getTargetNode().getId().equals(leader.getId())
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&& lastJoin.get().getTerm() == term) {
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return lastJoin;
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}
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return Optional.empty();
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}
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private void closePrevotingAndElectionScheduler() {
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if (prevotingRound != null) {
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prevotingRound.close();
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prevotingRound = null;
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}
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if (electionScheduler != null) {
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electionScheduler.close();
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electionScheduler = null;
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}
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}
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private void updateMaxTermSeen(final long term) {
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maxTermSeen.updateAndGet(oldMaxTerm -> Math.max(oldMaxTerm, term));
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// TODO if we are leader here, and there is no publication in flight, then we should bump our term
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// (if we are leader and there _is_ a publication in flight then doing so would cancel the publication, so don't do that, but
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// do check for this after the publication completes)
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}
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private void startElection() {
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synchronized (mutex) {
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// The preVoteCollector is only active while we are candidate, but it does not call this method with synchronisation, so we have
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// to check our mode again here.
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if (mode == Mode.CANDIDATE) {
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final StartJoinRequest startJoinRequest
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= new StartJoinRequest(getLocalNode(), Math.max(getCurrentTerm(), maxTermSeen.get()) + 1);
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getDiscoveredNodes().forEach(node -> joinHelper.sendStartJoinRequest(startJoinRequest, node));
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}
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}
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}
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private Optional<Join> ensureTermAtLeast(DiscoveryNode sourceNode, long targetTerm) {
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@ -65,19 +177,20 @@ public class Coordinator extends AbstractLifecycleComponent {
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}
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private Join joinLeaderInTerm(StartJoinRequest startJoinRequest) {
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assert Thread.holdsLock(mutex) : "Coordinator mutex not held";
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logger.debug("joinLeaderInTerm: from [{}] with term {}", startJoinRequest.getSourceNode(), startJoinRequest.getTerm());
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Join join = coordinationState.get().handleStartJoin(startJoinRequest);
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lastJoin = Optional.of(join);
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if (mode != Mode.CANDIDATE) {
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becomeCandidate("joinLeaderInTerm");
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synchronized (mutex) {
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logger.debug("joinLeaderInTerm: for [{}] with term {}", startJoinRequest.getSourceNode(), startJoinRequest.getTerm());
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final Join join = coordinationState.get().handleStartJoin(startJoinRequest);
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lastJoin = Optional.of(join);
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if (mode != Mode.CANDIDATE) {
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becomeCandidate("joinLeaderInTerm");
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}
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return join;
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}
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return join;
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}
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private void handleJoinRequest(JoinRequest joinRequest, JoinHelper.JoinCallback joinCallback) {
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assert Thread.holdsLock(mutex) == false;
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logger.trace("handleJoin: as {}, handling {}", mode, joinRequest);
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logger.trace("handleJoinRequest: as {}, handling {}", mode, joinRequest);
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transportService.connectToNode(joinRequest.getSourceNode());
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final Optional<Join> optionalJoin = joinRequest.getOptionalJoin();
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@ -85,29 +198,11 @@ public class Coordinator extends AbstractLifecycleComponent {
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final CoordinationState coordState = coordinationState.get();
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final boolean prevElectionWon = coordState.electionWon();
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if (optionalJoin.isPresent()) {
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Join join = optionalJoin.get();
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// if someone thinks we should be master, let's add our vote and try to become one
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// note that the following line should never throw an exception
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ensureTermAtLeast(getLocalNode(), join.getTerm()).ifPresent(coordState::handleJoin);
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if (coordState.electionWon()) {
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// if we have already won the election then the actual join does not matter for election purposes,
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// so swallow any exception
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try {
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coordState.handleJoin(join);
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} catch (CoordinationStateRejectedException e) {
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logger.trace("failed to add join, ignoring", e);
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}
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} else {
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coordState.handleJoin(join); // this might fail and bubble up the exception
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}
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}
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optionalJoin.ifPresent(this::handleJoin);
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joinAccumulator.handleJoinRequest(joinRequest.getSourceNode(), joinCallback);
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if (prevElectionWon == false && coordState.electionWon()) {
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becomeLeader("handleJoin");
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becomeLeader("handleJoinRequest");
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}
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}
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}
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@ -120,7 +215,11 @@ public class Coordinator extends AbstractLifecycleComponent {
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mode = Mode.CANDIDATE;
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joinAccumulator.close(mode);
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joinAccumulator = joinHelper.new CandidateJoinAccumulator();
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peerFinder.activate(coordinationState.get().getLastAcceptedState().nodes());
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}
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preVoteCollector.update(getPreVoteResponse(), null);
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}
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void becomeLeader(String method) {
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@ -129,9 +228,13 @@ public class Coordinator extends AbstractLifecycleComponent {
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logger.debug("{}: becoming LEADER (was {}, lastKnownLeader was [{}])", method, mode, lastKnownLeader);
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mode = Mode.LEADER;
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lastKnownLeader = Optional.of(getLocalNode());
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joinAccumulator.close(mode);
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joinAccumulator = joinHelper.new LeaderJoinAccumulator();
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lastKnownLeader = Optional.of(getLocalNode());
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peerFinder.deactivate(getLocalNode());
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closePrevotingAndElectionScheduler();
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preVoteCollector.update(getPreVoteResponse(), getLocalNode());
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}
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void becomeFollower(String method, DiscoveryNode leaderNode) {
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@ -145,6 +248,14 @@ public class Coordinator extends AbstractLifecycleComponent {
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}
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lastKnownLeader = Optional.of(leaderNode);
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peerFinder.deactivate(leaderNode);
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closePrevotingAndElectionScheduler();
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preVoteCollector.update(getPreVoteResponse(), leaderNode);
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}
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private PreVoteResponse getPreVoteResponse() {
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return new PreVoteResponse(getCurrentTerm(), coordinationState.get().getLastAcceptedTerm(),
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coordinationState.get().getLastAcceptedVersion());
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}
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// package-visible for testing
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@ -170,6 +281,7 @@ public class Coordinator extends AbstractLifecycleComponent {
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protected void doStart() {
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CoordinationState.PersistedState persistedState = persistedStateSupplier.get();
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coordinationState.set(new CoordinationState(settings, getLocalNode(), persistedState));
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configuredHostsResolver.start();
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}
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public void startInitialJoin() {
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@ -180,7 +292,7 @@ public class Coordinator extends AbstractLifecycleComponent {
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@Override
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protected void doStop() {
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configuredHostsResolver.stop();
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}
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@Override
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@ -190,22 +302,115 @@ public class Coordinator extends AbstractLifecycleComponent {
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public void invariant() {
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synchronized (mutex) {
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final Optional<DiscoveryNode> peerFinderLeader = peerFinder.getLeader();
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if (mode == Mode.LEADER) {
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assert coordinationState.get().electionWon();
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assert lastKnownLeader.isPresent() && lastKnownLeader.get().equals(getLocalNode());
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assert joinAccumulator instanceof JoinHelper.LeaderJoinAccumulator;
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assert peerFinderLeader.equals(lastKnownLeader) : peerFinderLeader;
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assert electionScheduler == null : electionScheduler;
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assert prevotingRound == null : prevotingRound;
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} else if (mode == Mode.FOLLOWER) {
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assert coordinationState.get().electionWon() == false : getLocalNode() + " is FOLLOWER so electionWon() should be false";
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assert lastKnownLeader.isPresent() && (lastKnownLeader.get().equals(getLocalNode()) == false);
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assert joinAccumulator instanceof JoinHelper.FollowerJoinAccumulator;
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assert peerFinderLeader.equals(lastKnownLeader) : peerFinderLeader;
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assert electionScheduler == null : electionScheduler;
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assert prevotingRound == null : prevotingRound;
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} else {
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assert mode == Mode.CANDIDATE;
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assert joinAccumulator instanceof JoinHelper.CandidateJoinAccumulator;
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assert peerFinderLeader.isPresent() == false : peerFinderLeader;
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assert prevotingRound == null || electionScheduler != null;
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}
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}
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}
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// for tests
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boolean hasJoinVoteFrom(DiscoveryNode localNode) {
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return coordinationState.get().containsJoinVoteFor(localNode);
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}
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void handleJoin(Join join) {
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synchronized (mutex) {
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ensureTermAtLeast(getLocalNode(), join.getTerm()).ifPresent(this::handleJoin);
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if (coordinationState.get().electionWon()) {
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// if we have already won the election then the actual join does not matter for election purposes,
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// so swallow any exception
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try {
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coordinationState.get().handleJoin(join);
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} catch (CoordinationStateRejectedException e) {
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logger.debug("failed to add join, ignoring", e);
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}
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} else {
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coordinationState.get().handleJoin(join); // this might fail and bubble up the exception
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}
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}
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}
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public ClusterState getLastAcceptedState() {
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synchronized (mutex) {
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return coordinationState.get().getLastAcceptedState();
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}
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}
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public Optional<ClusterState> getLastCommittedState() {
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return lastCommittedState;
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}
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private List<DiscoveryNode> getDiscoveredNodes() {
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final List<DiscoveryNode> nodes = new ArrayList<>();
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nodes.add(getLocalNode());
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peerFinder.getFoundPeers().forEach(nodes::add);
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return nodes;
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}
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public enum Mode {
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CANDIDATE, LEADER, FOLLOWER
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}
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private class CoordinatorPeerFinder extends PeerFinder {
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CoordinatorPeerFinder(Settings settings, TransportService transportService, TransportAddressConnector transportAddressConnector,
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ConfiguredHostsResolver configuredHostsResolver) {
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super(settings, transportService, transportAddressConnector, configuredHostsResolver);
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}
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@Override
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protected void onActiveMasterFound(DiscoveryNode masterNode, long term) {
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// TODO
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}
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@Override
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protected void onFoundPeersUpdated() {
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synchronized (mutex) {
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if (mode == Mode.CANDIDATE) {
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final CoordinationState.VoteCollection expectedVotes = new CoordinationState.VoteCollection();
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getFoundPeers().forEach(expectedVotes::addVote);
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expectedVotes.addVote(Coordinator.this.getLocalNode());
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final ClusterState lastAcceptedState = coordinationState.get().getLastAcceptedState();
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final boolean foundQuorum = CoordinationState.isElectionQuorum(expectedVotes, lastAcceptedState);
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if (foundQuorum) {
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if (electionScheduler == null) {
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final TimeValue gracePeriod = TimeValue.ZERO; // TODO variable grace period
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electionScheduler = electionSchedulerFactory.startElectionScheduler(gracePeriod, () -> {
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synchronized (mutex) {
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if (mode == Mode.CANDIDATE) {
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if (prevotingRound != null) {
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prevotingRound.close();
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}
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prevotingRound = preVoteCollector.start(lastAcceptedState, getDiscoveredNodes());
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}
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}
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});
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}
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} else {
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closePrevotingAndElectionScheduler();
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}
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}
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}
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}
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}
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}
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@ -18,6 +18,7 @@
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*/
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package org.elasticsearch.cluster.coordination;
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import org.apache.logging.log4j.message.ParameterizedMessage;
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import org.elasticsearch.cluster.ClusterState;
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import org.elasticsearch.cluster.ClusterStateTaskConfig;
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import org.elasticsearch.cluster.ClusterStateTaskListener;
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@ -27,21 +28,29 @@ import org.elasticsearch.cluster.routing.allocation.AllocationService;
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import org.elasticsearch.cluster.service.MasterService;
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import org.elasticsearch.common.Priority;
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import org.elasticsearch.common.component.AbstractComponent;
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import org.elasticsearch.common.io.stream.StreamInput;
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import org.elasticsearch.common.settings.Settings;
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import org.elasticsearch.threadpool.ThreadPool;
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import org.elasticsearch.threadpool.ThreadPool.Names;
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import org.elasticsearch.transport.TransportException;
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import org.elasticsearch.transport.TransportResponse;
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import org.elasticsearch.transport.TransportResponse.Empty;
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import org.elasticsearch.transport.TransportResponseHandler;
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import org.elasticsearch.transport.TransportService;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import java.util.function.BiConsumer;
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import java.util.function.Function;
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import java.util.function.LongSupplier;
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|
||||
public class JoinHelper extends AbstractComponent {
|
||||
|
||||
public static final String JOIN_ACTION_NAME = "internal:cluster/coordination/join";
|
||||
public static final String START_JOIN_ACTION_NAME = "internal:cluster/coordination/start_join";
|
||||
|
||||
private final MasterService masterService;
|
||||
private final TransportService transportService;
|
||||
|
|
@ -49,7 +58,7 @@ public class JoinHelper extends AbstractComponent {
|
|||
|
||||
public JoinHelper(Settings settings, AllocationService allocationService, MasterService masterService,
|
||||
TransportService transportService, LongSupplier currentTermSupplier,
|
||||
BiConsumer<JoinRequest, JoinCallback> joinHandler) {
|
||||
BiConsumer<JoinRequest, JoinCallback> joinHandler, Function<StartJoinRequest, Join> joinLeaderInTerm) {
|
||||
super(settings);
|
||||
this.masterService = masterService;
|
||||
this.transportService = transportService;
|
||||
|
|
@ -100,6 +109,62 @@ public class JoinHelper extends AbstractComponent {
|
|||
return "JoinCallback{request=" + request + "}";
|
||||
}
|
||||
}));
|
||||
|
||||
transportService.registerRequestHandler(START_JOIN_ACTION_NAME, Names.GENERIC, false, false,
|
||||
StartJoinRequest::new,
|
||||
(request, channel, task) -> {
|
||||
final DiscoveryNode destination = request.getSourceNode();
|
||||
final JoinRequest joinRequest
|
||||
= new JoinRequest(transportService.getLocalNode(), Optional.of(joinLeaderInTerm.apply(request)));
|
||||
logger.debug("attempting to join {} with {}", destination, joinRequest);
|
||||
this.transportService.sendRequest(destination, JOIN_ACTION_NAME, joinRequest, new TransportResponseHandler<Empty>() {
|
||||
@Override
|
||||
public Empty read(StreamInput in) {
|
||||
return Empty.INSTANCE;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleResponse(Empty response) {
|
||||
logger.debug("successfully joined {} with {}", destination, joinRequest);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleException(TransportException exp) {
|
||||
logger.debug(() -> new ParameterizedMessage("failed to join {} with {}", destination, joinRequest), exp);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String executor() {
|
||||
return Names.SAME;
|
||||
}
|
||||
});
|
||||
channel.sendResponse(Empty.INSTANCE);
|
||||
});
|
||||
}
|
||||
|
||||
public void sendStartJoinRequest(final StartJoinRequest startJoinRequest, final DiscoveryNode destination) {
|
||||
transportService.sendRequest(destination, START_JOIN_ACTION_NAME,
|
||||
startJoinRequest, new TransportResponseHandler<Empty>() {
|
||||
@Override
|
||||
public Empty read(StreamInput in) {
|
||||
return Empty.INSTANCE;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleResponse(Empty response) {
|
||||
logger.debug("successful response to {} from {}", startJoinRequest, destination);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleException(TransportException exp) {
|
||||
logger.debug(new ParameterizedMessage("failure in response to {} from {}", startJoinRequest, destination), exp);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String executor() {
|
||||
return ThreadPool.Names.SAME;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
public interface JoinCallback {
|
||||
|
|
@ -211,7 +276,8 @@ public class JoinHelper extends AbstractComponent {
|
|||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "CandidateJoinAccumulator{" + joinRequestAccumulator.keySet() + '}';
|
||||
return "CandidateJoinAccumulator{" + joinRequestAccumulator.keySet() +
|
||||
", closed=" + closed + '}';
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -23,6 +23,7 @@ import org.apache.logging.log4j.message.ParameterizedMessage;
|
|||
import org.elasticsearch.cluster.ClusterState;
|
||||
import org.elasticsearch.cluster.coordination.CoordinationState.VoteCollection;
|
||||
import org.elasticsearch.cluster.node.DiscoveryNode;
|
||||
import org.elasticsearch.common.Nullable;
|
||||
import org.elasticsearch.common.collect.Tuple;
|
||||
import org.elasticsearch.common.component.AbstractComponent;
|
||||
import org.elasticsearch.common.lease.Releasable;
|
||||
|
|
@ -34,6 +35,7 @@ import org.elasticsearch.transport.TransportService;
|
|||
|
||||
import java.util.Set;
|
||||
import java.util.concurrent.atomic.AtomicBoolean;
|
||||
import java.util.function.LongConsumer;
|
||||
|
||||
import static org.elasticsearch.cluster.coordination.CoordinationState.isElectionQuorum;
|
||||
import static org.elasticsearch.common.util.concurrent.ConcurrentCollections.newConcurrentSet;
|
||||
|
|
@ -44,16 +46,17 @@ public class PreVoteCollector extends AbstractComponent {
|
|||
|
||||
private final TransportService transportService;
|
||||
private final Runnable startElection;
|
||||
private final LongConsumer updateMaxTermSeen;
|
||||
|
||||
// Tuple for simple atomic updates
|
||||
private volatile Tuple<DiscoveryNode, PreVoteResponse> state; // DiscoveryNode component is null if there is currently no known leader
|
||||
// Tuple for simple atomic updates. null until the first call to `update()`.
|
||||
private volatile Tuple<DiscoveryNode, PreVoteResponse> state; // DiscoveryNode component is null if there is currently no known leader.
|
||||
|
||||
PreVoteCollector(final Settings settings, final PreVoteResponse preVoteResponse,
|
||||
final TransportService transportService, final Runnable startElection) {
|
||||
PreVoteCollector(final Settings settings, final TransportService transportService, final Runnable startElection,
|
||||
final LongConsumer updateMaxTermSeen) {
|
||||
super(settings);
|
||||
state = new Tuple<>(null, preVoteResponse);
|
||||
this.transportService = transportService;
|
||||
this.startElection = startElection;
|
||||
this.updateMaxTermSeen = updateMaxTermSeen;
|
||||
|
||||
// TODO does this need to be on the generic threadpool or can it use SAME?
|
||||
transportService.registerRequestHandler(REQUEST_PRE_VOTE_ACTION_NAME, Names.GENERIC, false, false,
|
||||
|
|
@ -74,7 +77,7 @@ public class PreVoteCollector extends AbstractComponent {
|
|||
return preVotingRound;
|
||||
}
|
||||
|
||||
public void update(final PreVoteResponse preVoteResponse, final DiscoveryNode leader) {
|
||||
public void update(final PreVoteResponse preVoteResponse, @Nullable final DiscoveryNode leader) {
|
||||
logger.trace("updating with preVoteResponse={}, leader={}", preVoteResponse, leader);
|
||||
state = new Tuple<>(leader, preVoteResponse);
|
||||
}
|
||||
|
|
@ -156,7 +159,7 @@ public class PreVoteCollector extends AbstractComponent {
|
|||
return;
|
||||
}
|
||||
|
||||
// TODO the response carries the sender's current term. If an election starts then it should be in a higher term.
|
||||
updateMaxTermSeen.accept(response.getCurrentTerm());
|
||||
|
||||
if (response.getLastAcceptedTerm() > clusterState.term()
|
||||
|| (response.getLastAcceptedTerm() == clusterState.term()
|
||||
|
|
|
|||
|
|
@ -156,7 +156,7 @@ public abstract class Publication extends AbstractComponent {
|
|||
|
||||
protected abstract Optional<ApplyCommitRequest> handlePublishResponse(DiscoveryNode sourceNode, PublishResponse publishResponse);
|
||||
|
||||
protected abstract void onPossibleJoin(DiscoveryNode sourceNode, PublishWithJoinResponse response);
|
||||
protected abstract void onJoin(Join join);
|
||||
|
||||
protected abstract void sendPublishRequest(DiscoveryNode destination, PublishRequest publishRequest,
|
||||
ActionListener<PublishWithJoinResponse> responseActionListener);
|
||||
|
|
@ -287,8 +287,10 @@ public abstract class Publication extends AbstractComponent {
|
|||
return;
|
||||
}
|
||||
|
||||
// TODO: check if we need to pass the full response here or if it's sufficient to just pass the optional join.
|
||||
onPossibleJoin(discoveryNode, response);
|
||||
response.getJoin().ifPresent(join -> {
|
||||
assert discoveryNode.equals(join.getSourceNode());
|
||||
onJoin(join);
|
||||
});
|
||||
|
||||
assert state == PublicationTargetState.SENT_PUBLISH_REQUEST : state + " -> " + PublicationTargetState.WAITING_FOR_QUORUM;
|
||||
state = PublicationTargetState.WAITING_FOR_QUORUM;
|
||||
|
|
|
|||
|
|
@ -72,8 +72,8 @@ public abstract class PeerFinder extends AbstractComponent {
|
|||
private final Map<TransportAddress, Peer> peersByAddress = newConcurrentMap();
|
||||
private Optional<DiscoveryNode> leader = Optional.empty();
|
||||
|
||||
PeerFinder(Settings settings, TransportService transportService,
|
||||
TransportAddressConnector transportAddressConnector, ConfiguredHostsResolver configuredHostsResolver) {
|
||||
public PeerFinder(Settings settings, TransportService transportService, TransportAddressConnector transportAddressConnector,
|
||||
ConfiguredHostsResolver configuredHostsResolver) {
|
||||
super(settings);
|
||||
findPeersDelay = DISCOVERY_FIND_PEERS_INTERVAL_SETTING.get(settings);
|
||||
this.transportService = transportService;
|
||||
|
|
@ -95,6 +95,8 @@ public abstract class PeerFinder extends AbstractComponent {
|
|||
leader = Optional.empty();
|
||||
handleWakeUp(); // return value discarded: there are no known peers, so none can be disconnected
|
||||
}
|
||||
|
||||
onFoundPeersUpdated(); // trigger a check for a quorum already
|
||||
}
|
||||
|
||||
public void deactivate(DiscoveryNode leader) {
|
||||
|
|
@ -116,7 +118,7 @@ public abstract class PeerFinder extends AbstractComponent {
|
|||
return Thread.holdsLock(mutex);
|
||||
}
|
||||
|
||||
boolean assertInactiveWithNoKnownPeers() {
|
||||
private boolean assertInactiveWithNoKnownPeers() {
|
||||
assert active == false;
|
||||
assert peersByAddress.isEmpty() : peersByAddress.keySet();
|
||||
return true;
|
||||
|
|
@ -125,13 +127,24 @@ public abstract class PeerFinder extends AbstractComponent {
|
|||
PeersResponse handlePeersRequest(PeersRequest peersRequest) {
|
||||
synchronized (mutex) {
|
||||
assert peersRequest.getSourceNode().equals(getLocalNode()) == false;
|
||||
final List<DiscoveryNode> knownPeers;
|
||||
if (active) {
|
||||
assert leader.isPresent() == false : leader;
|
||||
startProbe(peersRequest.getSourceNode().getAddress());
|
||||
peersRequest.getKnownPeers().stream().map(DiscoveryNode::getAddress).forEach(this::startProbe);
|
||||
return new PeersResponse(Optional.empty(), getFoundPeersUnderLock(), currentTerm);
|
||||
knownPeers = getFoundPeersUnderLock();
|
||||
} else {
|
||||
return new PeersResponse(leader, Collections.emptyList(), currentTerm);
|
||||
assert leader.isPresent();
|
||||
knownPeers = Collections.emptyList();
|
||||
}
|
||||
return new PeersResponse(leader, knownPeers, currentTerm);
|
||||
}
|
||||
}
|
||||
|
||||
// exposed for checking invariant in o.e.c.c.Coordinator (public since this is a different package)
|
||||
public Optional<DiscoveryNode> getLeader() {
|
||||
synchronized (mutex) {
|
||||
return leader;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -247,7 +260,7 @@ public abstract class PeerFinder extends AbstractComponent {
|
|||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "PeerFinder::handleWakeUp";
|
||||
return "PeerFinder handling wakeup";
|
||||
}
|
||||
});
|
||||
|
||||
|
|
|
|||
|
|
@ -733,6 +733,11 @@ public class TransportService extends AbstractLifecycleComponent implements Tran
|
|||
"failed to notify channel of error message for action [{}]", action), inner);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "processing of [" + action + "][" + requestId + "]: " + request;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
|
|
@ -1049,6 +1054,11 @@ public class TransportService extends AbstractLifecycleComponent implements Tran
|
|||
"cancel must be called after the requestId [" + requestId + "] has been removed from clientHandlers";
|
||||
FutureUtils.cancel(future);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String toString() {
|
||||
return "TimeoutHandler for [" + action + "][" + requestId + "]";
|
||||
}
|
||||
}
|
||||
|
||||
static class TimeoutInfoHolder {
|
||||
|
|
@ -1176,7 +1186,17 @@ public class TransportService extends AbstractLifecycleComponent implements Tran
|
|||
if (ThreadPool.Names.SAME.equals(executor)) {
|
||||
processResponse(handler, response);
|
||||
} else {
|
||||
threadPool.executor(executor).execute(() -> processResponse(handler, response));
|
||||
threadPool.executor(executor).execute(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "delivery of response to [" + action + "][" + requestId + "]: " + response;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
DirectResponseChannel.this.processResponse(handler, response);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -162,7 +162,8 @@ public class ShrinkIndexIT extends ESIntegTestCase {
|
|||
final List<Integer> factors = Arrays.asList(2, 3, 5, 7);
|
||||
final List<Integer> numberOfShardsFactors = randomSubsetOf(scaledRandomIntBetween(1, factors.size() - 1), factors);
|
||||
final int numberOfShards = numberOfShardsFactors.stream().reduce(1, (x, y) -> x * y);
|
||||
final int numberOfTargetShards = randomSubsetOf(numberOfShardsFactors).stream().reduce(1, (x, y) -> x * y);
|
||||
final int numberOfTargetShards = randomSubsetOf(randomInt(numberOfShardsFactors.size() - 1), numberOfShardsFactors)
|
||||
.stream().reduce(1, (x, y) -> x * y);
|
||||
internalCluster().ensureAtLeastNumDataNodes(2);
|
||||
prepareCreate("source").setSettings(Settings.builder().put(indexSettings()).put("number_of_shards", numberOfShards)).get();
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,466 @@
|
|||
/*
|
||||
* Licensed to Elasticsearch under one or more contributor
|
||||
* license agreements. See the NOTICE file distributed with
|
||||
* this work for additional information regarding copyright
|
||||
* ownership. Elasticsearch licenses this file to you under
|
||||
* the Apache License, Version 2.0 (the "License"); you may
|
||||
* not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing,
|
||||
* software distributed under the License is distributed on an
|
||||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
||||
* KIND, either express or implied. See the License for the
|
||||
* specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*/
|
||||
package org.elasticsearch.cluster.coordination;
|
||||
|
||||
import org.apache.logging.log4j.message.ParameterizedMessage;
|
||||
import org.elasticsearch.Version;
|
||||
import org.elasticsearch.action.ActionListener;
|
||||
import org.elasticsearch.cluster.ClusterState;
|
||||
import org.elasticsearch.cluster.ClusterState.VotingConfiguration;
|
||||
import org.elasticsearch.cluster.ClusterStateUpdateTask;
|
||||
import org.elasticsearch.cluster.ESAllocationTestCase;
|
||||
import org.elasticsearch.cluster.coordination.CoordinationState.PersistedState;
|
||||
import org.elasticsearch.cluster.coordination.CoordinationState.VoteCollection;
|
||||
import org.elasticsearch.cluster.coordination.CoordinationStateTests.InMemoryPersistedState;
|
||||
import org.elasticsearch.cluster.coordination.CoordinatorTests.Cluster.ClusterNode;
|
||||
import org.elasticsearch.cluster.node.DiscoveryNode;
|
||||
import org.elasticsearch.cluster.node.DiscoveryNode.Role;
|
||||
import org.elasticsearch.cluster.service.MasterService;
|
||||
import org.elasticsearch.common.UUIDs;
|
||||
import org.elasticsearch.common.component.AbstractComponent;
|
||||
import org.elasticsearch.common.settings.Settings;
|
||||
import org.elasticsearch.common.transport.TransportAddress;
|
||||
import org.elasticsearch.discovery.zen.UnicastHostsProvider.HostsResolver;
|
||||
import org.elasticsearch.indices.cluster.FakeThreadPoolMasterService;
|
||||
import org.elasticsearch.test.ESTestCase;
|
||||
import org.elasticsearch.test.junit.annotations.TestLogging;
|
||||
import org.elasticsearch.test.transport.CapturingTransport;
|
||||
import org.elasticsearch.threadpool.ThreadPool.Names;
|
||||
import org.elasticsearch.transport.RequestHandlerRegistry;
|
||||
import org.elasticsearch.transport.TransportChannel;
|
||||
import org.elasticsearch.transport.TransportException;
|
||||
import org.elasticsearch.transport.TransportRequest;
|
||||
import org.elasticsearch.transport.TransportResponse;
|
||||
import org.elasticsearch.transport.TransportResponse.Empty;
|
||||
import org.elasticsearch.transport.TransportResponseHandler;
|
||||
import org.elasticsearch.transport.TransportResponseOptions;
|
||||
import org.elasticsearch.transport.TransportService;
|
||||
import org.hamcrest.Matcher;
|
||||
|
||||
import java.util.ArrayList;
|
||||
import java.util.Collections;
|
||||
import java.util.EnumSet;
|
||||
import java.util.HashSet;
|
||||
import java.util.List;
|
||||
import java.util.Optional;
|
||||
import java.util.Set;
|
||||
import java.util.concurrent.atomic.AtomicReference;
|
||||
import java.util.function.Consumer;
|
||||
import java.util.function.Predicate;
|
||||
import java.util.stream.Collectors;
|
||||
|
||||
import static java.util.Collections.emptySet;
|
||||
import static org.elasticsearch.cluster.coordination.CoordinationStateTests.clusterState;
|
||||
import static org.elasticsearch.cluster.coordination.CoordinationStateTests.setValue;
|
||||
import static org.elasticsearch.cluster.coordination.CoordinationStateTests.value;
|
||||
import static org.elasticsearch.cluster.coordination.Coordinator.COMMIT_STATE_ACTION_NAME;
|
||||
import static org.elasticsearch.cluster.coordination.Coordinator.Mode.FOLLOWER;
|
||||
import static org.elasticsearch.cluster.coordination.Coordinator.PUBLISH_STATE_ACTION_NAME;
|
||||
import static org.elasticsearch.node.Node.NODE_NAME_SETTING;
|
||||
import static org.elasticsearch.transport.TransportService.HANDSHAKE_ACTION_NAME;
|
||||
import static org.elasticsearch.transport.TransportService.NOOP_TRANSPORT_INTERCEPTOR;
|
||||
import static org.hamcrest.Matchers.empty;
|
||||
import static org.hamcrest.Matchers.equalTo;
|
||||
import static org.hamcrest.Matchers.is;
|
||||
import static org.hamcrest.Matchers.not;
|
||||
|
||||
@TestLogging("org.elasticsearch.cluster.coordination:TRACE,org.elasticsearch.cluster.discovery:TRACE")
|
||||
public class CoordinatorTests extends ESTestCase {
|
||||
|
||||
public void testCanUpdateClusterStateAfterStabilisation() {
|
||||
final Cluster cluster = new Cluster(randomIntBetween(1, 5));
|
||||
cluster.stabilise();
|
||||
|
||||
final ClusterNode leader = cluster.getAnyLeader();
|
||||
long finalValue = randomLong();
|
||||
leader.submitValue(finalValue);
|
||||
cluster.stabilise(); // TODO this should only need a short stabilisation
|
||||
|
||||
for (final ClusterNode clusterNode : cluster.clusterNodes) {
|
||||
final String nodeId = clusterNode.getId();
|
||||
final ClusterState committedState = clusterNode.coordinator.getLastCommittedState().get();
|
||||
assertThat(nodeId + " has the committed value", value(committedState), is(finalValue));
|
||||
}
|
||||
}
|
||||
|
||||
private static String nodeIdFromIndex(int nodeIndex) {
|
||||
return "node" + nodeIndex;
|
||||
}
|
||||
|
||||
class Cluster {
|
||||
|
||||
static final long DEFAULT_STABILISATION_TIME = 3000L; // TODO use a real stabilisation time - needs fault detection and disruption
|
||||
|
||||
final List<ClusterNode> clusterNodes;
|
||||
final DeterministicTaskQueue deterministicTaskQueue = new DeterministicTaskQueue(
|
||||
Settings.builder().put(NODE_NAME_SETTING.getKey(), "deterministic-task-queue").build());
|
||||
private final VotingConfiguration initialConfiguration;
|
||||
|
||||
Cluster(int initialNodeCount) {
|
||||
logger.info("--> creating cluster of {} nodes", initialNodeCount);
|
||||
|
||||
Set<String> initialNodeIds = new HashSet<>(initialNodeCount);
|
||||
for (int i = 0; i < initialNodeCount; i++) {
|
||||
initialNodeIds.add(nodeIdFromIndex(i));
|
||||
}
|
||||
initialConfiguration = new VotingConfiguration(initialNodeIds);
|
||||
|
||||
clusterNodes = new ArrayList<>(initialNodeCount);
|
||||
for (int i = 0; i < initialNodeCount; i++) {
|
||||
final ClusterNode clusterNode = new ClusterNode(i);
|
||||
clusterNodes.add(clusterNode);
|
||||
}
|
||||
}
|
||||
|
||||
void stabilise() {
|
||||
final long stabilisationStartTime = deterministicTaskQueue.getCurrentTimeMillis();
|
||||
while (deterministicTaskQueue.getCurrentTimeMillis() < stabilisationStartTime + DEFAULT_STABILISATION_TIME) {
|
||||
|
||||
while (deterministicTaskQueue.hasRunnableTasks()) {
|
||||
try {
|
||||
deterministicTaskQueue.runRandomTask(random());
|
||||
} catch (CoordinationStateRejectedException e) {
|
||||
logger.debug("ignoring benign exception thrown when stabilising", e);
|
||||
}
|
||||
for (final ClusterNode clusterNode : clusterNodes) {
|
||||
clusterNode.coordinator.invariant();
|
||||
}
|
||||
}
|
||||
|
||||
if (deterministicTaskQueue.hasDeferredTasks() == false) {
|
||||
break; // TODO when fault detection is enabled this should be removed, as there should _always_ be deferred tasks
|
||||
}
|
||||
|
||||
deterministicTaskQueue.advanceTime();
|
||||
}
|
||||
|
||||
assertUniqueLeaderAndExpectedModes();
|
||||
}
|
||||
|
||||
private void assertUniqueLeaderAndExpectedModes() {
|
||||
final ClusterNode leader = getAnyLeader();
|
||||
final long leaderTerm = leader.coordinator.getCurrentTerm();
|
||||
Matcher<Optional<Long>> isPresentAndEqualToLeaderVersion
|
||||
= equalTo(Optional.of(leader.coordinator.getLastAcceptedState().getVersion()));
|
||||
|
||||
assertThat(leader.coordinator.getLastCommittedState().map(ClusterState::getVersion), isPresentAndEqualToLeaderVersion);
|
||||
|
||||
for (final ClusterNode clusterNode : clusterNodes) {
|
||||
if (clusterNode == leader) {
|
||||
continue;
|
||||
}
|
||||
|
||||
final String nodeId = clusterNode.getId();
|
||||
assertThat(nodeId + " has the same term as the leader", clusterNode.coordinator.getCurrentTerm(), is(leaderTerm));
|
||||
assertTrue("leader should have received a vote from " + nodeId,
|
||||
leader.coordinator.hasJoinVoteFrom(clusterNode.getLocalNode()));
|
||||
|
||||
assertThat(nodeId + " is a follower", clusterNode.coordinator.getMode(), is(FOLLOWER));
|
||||
assertThat(nodeId + " is at the same accepted version as the leader",
|
||||
Optional.of(clusterNode.coordinator.getLastAcceptedState().getVersion()), isPresentAndEqualToLeaderVersion);
|
||||
assertThat(nodeId + " is at the same committed version as the leader",
|
||||
clusterNode.coordinator.getLastCommittedState().map(ClusterState::getVersion), isPresentAndEqualToLeaderVersion);
|
||||
}
|
||||
}
|
||||
|
||||
ClusterNode getAnyLeader() {
|
||||
List<ClusterNode> allLeaders = clusterNodes.stream().filter(ClusterNode::isLeader).collect(Collectors.toList());
|
||||
assertThat(allLeaders, not(empty()));
|
||||
return randomFrom(allLeaders);
|
||||
}
|
||||
|
||||
class ClusterNode extends AbstractComponent {
|
||||
private final int nodeIndex;
|
||||
private Coordinator coordinator;
|
||||
private DiscoveryNode localNode;
|
||||
private final PersistedState persistedState;
|
||||
private MasterService masterService;
|
||||
private TransportService transportService;
|
||||
private CapturingTransport capturingTransport;
|
||||
|
||||
ClusterNode(int nodeIndex) {
|
||||
super(Settings.builder().put(NODE_NAME_SETTING.getKey(), nodeIdFromIndex(nodeIndex)).build());
|
||||
this.nodeIndex = nodeIndex;
|
||||
localNode = createDiscoveryNode();
|
||||
persistedState = new InMemoryPersistedState(1L,
|
||||
clusterState(1L, 1L, localNode, initialConfiguration, initialConfiguration, 0L));
|
||||
setUp();
|
||||
}
|
||||
|
||||
private DiscoveryNode createDiscoveryNode() {
|
||||
final TransportAddress transportAddress = buildNewFakeTransportAddress();
|
||||
// Generate the ephemeral ID deterministically, for repeatable tests. This means we have to pass everything else into the
|
||||
// constructor explicitly too.
|
||||
return new DiscoveryNode("", nodeIdFromIndex(nodeIndex), UUIDs.randomBase64UUID(random()),
|
||||
transportAddress.address().getHostString(),
|
||||
transportAddress.getAddress(), transportAddress, Collections.emptyMap(),
|
||||
EnumSet.allOf(Role.class), Version.CURRENT);
|
||||
}
|
||||
|
||||
private void setUp() {
|
||||
capturingTransport = new CapturingTransport() {
|
||||
@Override
|
||||
protected void onSendRequest(long requestId, String action, TransportRequest request, DiscoveryNode destination) {
|
||||
assert destination.equals(localNode) == false : "non-local message from " + localNode + " to itself";
|
||||
super.onSendRequest(requestId, action, request, destination);
|
||||
|
||||
// connecting and handshaking with a new node happens synchronously, so we cannot enqueue these tasks for later
|
||||
final Consumer<Runnable> scheduler;
|
||||
final Predicate<ClusterNode> matchesDestination;
|
||||
if (action.equals(HANDSHAKE_ACTION_NAME)) {
|
||||
scheduler = Runnable::run;
|
||||
matchesDestination = n -> n.getLocalNode().getAddress().equals(destination.getAddress());
|
||||
} else {
|
||||
scheduler = deterministicTaskQueue::scheduleNow;
|
||||
matchesDestination = n -> n.getLocalNode().equals(destination);
|
||||
}
|
||||
|
||||
scheduler.accept(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "delivery of [" + action + "][" + requestId + "]: " + request;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
clusterNodes.stream().filter(matchesDestination).findAny().ifPresent(
|
||||
destinationNode -> {
|
||||
|
||||
final RequestHandlerRegistry requestHandler
|
||||
= destinationNode.capturingTransport.getRequestHandler(action);
|
||||
|
||||
final TransportChannel transportChannel = new TransportChannel() {
|
||||
@Override
|
||||
public String getProfileName() {
|
||||
return "default";
|
||||
}
|
||||
|
||||
@Override
|
||||
public String getChannelType() {
|
||||
return "coordinator-test-channel";
|
||||
}
|
||||
|
||||
@Override
|
||||
public void sendResponse(final TransportResponse response) {
|
||||
scheduler.accept(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "delivery of response " + response
|
||||
+ " to [" + action + "][" + requestId + "]: " + request;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
handleResponse(requestId, response);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
@Override
|
||||
public void sendResponse(TransportResponse response, TransportResponseOptions options) {
|
||||
sendResponse(response);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void sendResponse(Exception exception) {
|
||||
scheduler.accept(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "delivery of error response " + exception.getMessage()
|
||||
+ " to [" + action + "][" + requestId + "]: " + request;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
handleRemoteError(requestId, exception);
|
||||
}
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
processMessageReceived(request, requestHandler, transportChannel);
|
||||
} catch (Exception e) {
|
||||
scheduler.accept(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "delivery of processing error response " + e.getMessage()
|
||||
+ " to [" + action + "][" + requestId + "]: " + request;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
handleRemoteError(requestId, e);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
);
|
||||
}
|
||||
});
|
||||
}
|
||||
};
|
||||
|
||||
masterService = new FakeThreadPoolMasterService("test", deterministicTaskQueue::scheduleNow);
|
||||
AtomicReference<ClusterState> currentState = new AtomicReference<>(getPersistedState().getLastAcceptedState());
|
||||
masterService.setClusterStateSupplier(currentState::get);
|
||||
masterService.setClusterStatePublisher((event, publishListener, ackListener) -> {
|
||||
final PublishRequest publishRequest;
|
||||
try {
|
||||
publishRequest = coordinator.coordinationState.get().handleClientValue(event.state());
|
||||
} catch (CoordinationStateRejectedException e) {
|
||||
publishListener.onFailure(new FailedToCommitClusterStateException("rejected client value", e));
|
||||
return;
|
||||
}
|
||||
|
||||
final Publication publication = new Publication(settings, publishRequest, ackListener,
|
||||
deterministicTaskQueue::getCurrentTimeMillis) {
|
||||
|
||||
@Override
|
||||
protected void onCompletion(boolean committed) {
|
||||
if (committed) {
|
||||
currentState.set(event.state());
|
||||
publishListener.onResponse(null);
|
||||
} else {
|
||||
publishListener.onFailure(new FailedToCommitClusterStateException("not committed"));
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean isPublishQuorum(VoteCollection votes) {
|
||||
return coordinator.coordinationState.get().isPublishQuorum(votes);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Optional<ApplyCommitRequest> handlePublishResponse(DiscoveryNode sourceNode,
|
||||
PublishResponse publishResponse) {
|
||||
return coordinator.coordinationState.get().handlePublishResponse(sourceNode, publishResponse);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void onJoin(Join join) {
|
||||
coordinator.handleJoin(join);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void sendPublishRequest(DiscoveryNode destination, PublishRequest publishRequest,
|
||||
ActionListener<PublishWithJoinResponse> responseActionListener) {
|
||||
transportService.sendRequest(destination, PUBLISH_STATE_ACTION_NAME, publishRequest,
|
||||
|
||||
new TransportResponseHandler<PublishWithJoinResponse>() {
|
||||
|
||||
@Override
|
||||
public void handleResponse(PublishWithJoinResponse response) {
|
||||
responseActionListener.onResponse(response);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleException(TransportException exp) {
|
||||
responseActionListener.onFailure(exp);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String executor() {
|
||||
return Names.GENERIC;
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void sendApplyCommit(DiscoveryNode destination, ApplyCommitRequest applyCommit,
|
||||
ActionListener<Empty> responseActionListener) {
|
||||
transportService.sendRequest(destination, COMMIT_STATE_ACTION_NAME, applyCommit,
|
||||
|
||||
new TransportResponseHandler<Empty>() {
|
||||
|
||||
@Override
|
||||
public void handleResponse(Empty response) {
|
||||
responseActionListener.onResponse(response);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void handleException(TransportException exp) {
|
||||
responseActionListener.onFailure(exp);
|
||||
}
|
||||
|
||||
@Override
|
||||
public String executor() {
|
||||
return Names.GENERIC;
|
||||
}
|
||||
});
|
||||
}
|
||||
};
|
||||
publication.start(emptySet());
|
||||
});
|
||||
masterService.start();
|
||||
|
||||
transportService = capturingTransport.createCapturingTransportService(
|
||||
settings, deterministicTaskQueue.getThreadPool(), NOOP_TRANSPORT_INTERCEPTOR, a -> localNode, null, emptySet());
|
||||
transportService.start();
|
||||
transportService.acceptIncomingRequests();
|
||||
|
||||
coordinator = new Coordinator(settings, transportService, ESAllocationTestCase.createAllocationService(Settings.EMPTY),
|
||||
masterService, this::getPersistedState, Cluster.this::provideUnicastHosts);
|
||||
|
||||
coordinator.start();
|
||||
coordinator.startInitialJoin();
|
||||
}
|
||||
|
||||
private PersistedState getPersistedState() {
|
||||
return persistedState;
|
||||
}
|
||||
|
||||
String getId() {
|
||||
return localNode.getId();
|
||||
}
|
||||
|
||||
public DiscoveryNode getLocalNode() {
|
||||
return localNode;
|
||||
}
|
||||
|
||||
boolean isLeader() {
|
||||
return coordinator.getMode() == Coordinator.Mode.LEADER;
|
||||
}
|
||||
|
||||
void submitValue(final long value) {
|
||||
masterService.submitStateUpdateTask("new value [" + value + "]", new ClusterStateUpdateTask() {
|
||||
@Override
|
||||
public ClusterState execute(ClusterState currentState) {
|
||||
return setValue(currentState, value);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onFailure(String source, Exception e) {
|
||||
logger.debug(() -> new ParameterizedMessage("failed to publish: [{}]", source), e);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
private List<TransportAddress> provideUnicastHosts(HostsResolver ignored) {
|
||||
return clusterNodes.stream().map(ClusterNode::getLocalNode).map(DiscoveryNode::getAddress).collect(Collectors.toList());
|
||||
}
|
||||
}
|
||||
|
||||
@SuppressWarnings("unchecked")
|
||||
private static void processMessageReceived(TransportRequest request, RequestHandlerRegistry requestHandler,
|
||||
TransportChannel transportChannel) throws Exception {
|
||||
requestHandler.processMessageReceived(request, transportChannel);
|
||||
}
|
||||
}
|
||||
|
|
@ -326,7 +326,7 @@ public class DeterministicTaskQueue extends AbstractComponent {
|
|||
|
||||
@Override
|
||||
public boolean cancel(boolean mayInterruptIfRunning) {
|
||||
throw new UnsupportedOperationException();
|
||||
return false;
|
||||
}
|
||||
|
||||
@Override
|
||||
|
|
|
|||
|
|
@ -144,37 +144,39 @@ public class ElectionSchedulerFactoryTests extends ESTestCase {
|
|||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_INITIAL_TIMEOUT_SETTING.getKey(), "0s").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_INITIAL_TIMEOUT_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [0s] for setting [cluster.election.initial_timeout] must be >= 1ms"));
|
||||
assertThat(e.getMessage(), is("failed to parse value [0s] for setting [cluster.election.initial_timeout], must be >= [1ms]"));
|
||||
}
|
||||
|
||||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_INITIAL_TIMEOUT_SETTING.getKey(), "10001ms").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_INITIAL_TIMEOUT_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [10001ms] for setting [cluster.election.initial_timeout] must be <= 10s"));
|
||||
assertThat(e.getMessage(),
|
||||
is("failed to parse value [10001ms] for setting [cluster.election.initial_timeout], must be <= [10s]"));
|
||||
}
|
||||
|
||||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_BACK_OFF_TIME_SETTING.getKey(), "0s").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_BACK_OFF_TIME_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [0s] for setting [cluster.election.back_off_time] must be >= 1ms"));
|
||||
assertThat(e.getMessage(), is("failed to parse value [0s] for setting [cluster.election.back_off_time], must be >= [1ms]"));
|
||||
}
|
||||
|
||||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_BACK_OFF_TIME_SETTING.getKey(), "60001ms").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_BACK_OFF_TIME_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [60001ms] for setting [cluster.election.back_off_time] must be <= 1m"));
|
||||
assertThat(e.getMessage(),
|
||||
is("failed to parse value [60001ms] for setting [cluster.election.back_off_time], must be <= [60s]"));
|
||||
}
|
||||
|
||||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_MAX_TIMEOUT_SETTING.getKey(), "199ms").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_MAX_TIMEOUT_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [199ms] for setting [cluster.election.max_timeout] must be >= 200ms"));
|
||||
assertThat(e.getMessage(), is("failed to parse value [199ms] for setting [cluster.election.max_timeout], must be >= [200ms]"));
|
||||
}
|
||||
|
||||
{
|
||||
final Settings settings = Settings.builder().put(ELECTION_MAX_TIMEOUT_SETTING.getKey(), "301s").build();
|
||||
IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> ELECTION_MAX_TIMEOUT_SETTING.get(settings));
|
||||
assertThat(e.getMessage(), is("Failed to parse value [301s] for setting [cluster.election.max_timeout] must be <= 5m"));
|
||||
assertThat(e.getMessage(), is("failed to parse value [301s] for setting [cluster.election.max_timeout], must be <= [300s]"));
|
||||
}
|
||||
|
||||
{
|
||||
|
|
|
|||
|
|
@ -61,6 +61,7 @@ import java.util.concurrent.atomic.AtomicReference;
|
|||
import java.util.stream.Collectors;
|
||||
import java.util.stream.IntStream;
|
||||
|
||||
import static java.util.Collections.emptyList;
|
||||
import static java.util.Collections.emptyMap;
|
||||
import static org.hamcrest.Matchers.containsString;
|
||||
import static org.mockito.Matchers.anyObject;
|
||||
|
|
@ -135,6 +136,7 @@ public class NodeJoinTests extends ESTestCase {
|
|||
this.masterService = masterService;
|
||||
TransportService transportService = mock(TransportService.class);
|
||||
when(transportService.getLocalNode()).thenReturn(initialState.nodes().getLocalNode());
|
||||
when(transportService.getThreadPool()).thenReturn(threadPool);
|
||||
@SuppressWarnings("unchecked")
|
||||
ArgumentCaptor<TransportRequestHandler<JoinRequest>> joinRequestHandler = ArgumentCaptor.forClass(
|
||||
(Class) TransportRequestHandler.class);
|
||||
|
|
@ -142,7 +144,7 @@ public class NodeJoinTests extends ESTestCase {
|
|||
transportService,
|
||||
ESAllocationTestCase.createAllocationService(Settings.EMPTY),
|
||||
masterService,
|
||||
() -> new CoordinationStateTests.InMemoryPersistedState(term, initialState));
|
||||
() -> new CoordinationStateTests.InMemoryPersistedState(term, initialState), r -> emptyList());
|
||||
verify(transportService).registerRequestHandler(eq(JoinHelper.JOIN_ACTION_NAME), eq(ThreadPool.Names.GENERIC), eq(false), eq(false),
|
||||
anyObject(), joinRequestHandler.capture());
|
||||
transportRequestHandler = joinRequestHandler.getValue();
|
||||
|
|
|
|||
|
|
@ -109,10 +109,12 @@ public class PreVoteCollectorTests extends ESTestCase {
|
|||
transportService.start();
|
||||
transportService.acceptIncomingRequests();
|
||||
|
||||
preVoteCollector = new PreVoteCollector(settings, getLocalPreVoteResponse(), transportService, () -> {
|
||||
preVoteCollector = new PreVoteCollector(settings, transportService, () -> {
|
||||
assert electionOccurred == false;
|
||||
electionOccurred = true;
|
||||
});
|
||||
}, l -> {
|
||||
}); // TODO need tests that check that the max term seen is updated
|
||||
preVoteCollector.update(getLocalPreVoteResponse(), null);
|
||||
}
|
||||
|
||||
private PreVoteResponse getLocalPreVoteResponse() {
|
||||
|
|
|
|||
|
|
@ -100,7 +100,7 @@ public class PublicationTests extends ESTestCase {
|
|||
|
||||
Map<DiscoveryNode, ActionListener<PublishWithJoinResponse>> pendingPublications = new HashMap<>();
|
||||
Map<DiscoveryNode, ActionListener<TransportResponse.Empty>> pendingCommits = new HashMap<>();
|
||||
Map<DiscoveryNode, PublishWithJoinResponse> possibleJoins = new HashMap<>();
|
||||
Map<DiscoveryNode, Join> joins = new HashMap<>();
|
||||
|
||||
MockPublication(Settings settings, PublishRequest publishRequest, Discovery.AckListener ackListener,
|
||||
LongSupplier currentTimeSupplier) {
|
||||
|
|
@ -116,8 +116,8 @@ public class PublicationTests extends ESTestCase {
|
|||
}
|
||||
|
||||
@Override
|
||||
protected void onPossibleJoin(DiscoveryNode sourceNode, PublishWithJoinResponse response) {
|
||||
assertNull(possibleJoins.put(sourceNode, response));
|
||||
protected void onJoin(Join join) {
|
||||
assertNull(joins.put(join.getSourceNode(), join));
|
||||
}
|
||||
|
||||
@Override
|
||||
|
|
@ -180,13 +180,17 @@ public class PublicationTests extends ESTestCase {
|
|||
PublishResponse publishResponse = nodeResolver.apply(e.getKey()).coordinationState.handlePublishRequest(
|
||||
publication.publishRequest);
|
||||
assertNotEquals(processedNode1PublishResponse.get(), publication.pendingCommits.isEmpty());
|
||||
assertFalse(publication.possibleJoins.containsKey(e.getKey()));
|
||||
assertFalse(publication.joins.containsKey(e.getKey()));
|
||||
PublishWithJoinResponse publishWithJoinResponse = new PublishWithJoinResponse(publishResponse,
|
||||
randomBoolean() ? Optional.empty() : Optional.of(new Join(e.getKey(), randomFrom(n1, n2, n3), randomNonNegativeLong(),
|
||||
randomNonNegativeLong(), randomNonNegativeLong())));
|
||||
e.getValue().onResponse(publishWithJoinResponse);
|
||||
assertTrue(publication.possibleJoins.containsKey(e.getKey()));
|
||||
assertEquals(publishWithJoinResponse, publication.possibleJoins.get(e.getKey()));
|
||||
if (publishWithJoinResponse.getJoin().isPresent()) {
|
||||
assertTrue(publication.joins.containsKey(e.getKey()));
|
||||
assertEquals(publishWithJoinResponse.getJoin().get(), publication.joins.get(e.getKey()));
|
||||
} else {
|
||||
assertFalse(publication.joins.containsKey(e.getKey()));
|
||||
}
|
||||
if (e.getKey().equals(n1)) {
|
||||
processedNode1PublishResponse.set(true);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -799,7 +799,7 @@ public class SettingTests extends ESTestCase {
|
|||
= expectThrows(IllegalArgumentException.class,
|
||||
() -> settingWithLowerBound.get(Settings.builder().put("foo", "4999ms").build()));
|
||||
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("Failed to parse value [4999ms] for setting [foo] must be >= 5s"));
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("failed to parse value [4999ms] for setting [foo], must be >= [5s]"));
|
||||
|
||||
Setting<TimeValue> settingWithBothBounds = Setting.timeSetting("bar",
|
||||
TimeValue.timeValueSeconds(10), TimeValue.timeValueSeconds(5), TimeValue.timeValueSeconds(20));
|
||||
|
|
@ -810,12 +810,12 @@ public class SettingTests extends ESTestCase {
|
|||
illegalArgumentException
|
||||
= expectThrows(IllegalArgumentException.class,
|
||||
() -> settingWithBothBounds.get(Settings.builder().put("bar", "4999ms").build()));
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("Failed to parse value [4999ms] for setting [bar] must be >= 5s"));
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("failed to parse value [4999ms] for setting [bar], must be >= [5s]"));
|
||||
|
||||
illegalArgumentException
|
||||
= expectThrows(IllegalArgumentException.class,
|
||||
() -> settingWithBothBounds.get(Settings.builder().put("bar", "20001ms").build()));
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("Failed to parse value [20001ms] for setting [bar] must be <= 20s"));
|
||||
assertThat(illegalArgumentException.getMessage(), equalTo("failed to parse value [20001ms] for setting [bar], must be <= [20s]"));
|
||||
}
|
||||
|
||||
public void testSettingsGroupUpdater() {
|
||||
|
|
|
|||
|
|
@ -84,20 +84,28 @@ public class FakeThreadPoolMasterService extends MasterService {
|
|||
private void scheduleNextTaskIfNecessary() {
|
||||
if (taskInProgress == false && pendingTasks.isEmpty() == false && scheduledNextTask == false) {
|
||||
scheduledNextTask = true;
|
||||
onTaskAvailableToRun.accept(() -> {
|
||||
assert taskInProgress == false;
|
||||
assert waitForPublish == false;
|
||||
assert scheduledNextTask;
|
||||
final int taskIndex = randomInt(pendingTasks.size() - 1);
|
||||
logger.debug("next master service task: choosing task {} of {}", taskIndex, pendingTasks.size());
|
||||
final Runnable task = pendingTasks.remove(taskIndex);
|
||||
taskInProgress = true;
|
||||
scheduledNextTask = false;
|
||||
task.run();
|
||||
if (waitForPublish == false) {
|
||||
taskInProgress = false;
|
||||
onTaskAvailableToRun.accept(new Runnable() {
|
||||
@Override
|
||||
public String toString() {
|
||||
return "master service scheduling next task";
|
||||
}
|
||||
|
||||
@Override
|
||||
public void run() {
|
||||
assert taskInProgress == false;
|
||||
assert waitForPublish == false;
|
||||
assert scheduledNextTask;
|
||||
final int taskIndex = randomInt(pendingTasks.size() - 1);
|
||||
logger.debug("next master service task: choosing task {} of {}", taskIndex, pendingTasks.size());
|
||||
final Runnable task = pendingTasks.remove(taskIndex);
|
||||
taskInProgress = true;
|
||||
scheduledNextTask = false;
|
||||
task.run();
|
||||
if (waitForPublish == false) {
|
||||
taskInProgress = false;
|
||||
}
|
||||
FakeThreadPoolMasterService.this.scheduleNextTaskIfNecessary();
|
||||
}
|
||||
scheduleNextTaskIfNecessary();
|
||||
});
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -373,6 +373,9 @@ public class MonitoringIT extends ESSingleNodeTestCase {
|
|||
assertThat(clusterState.remove("cluster_uuid"), notNullValue());
|
||||
assertThat(clusterState.remove("master_node"), notNullValue());
|
||||
assertThat(clusterState.remove("nodes"), notNullValue());
|
||||
assertThat(clusterState.remove("term"), notNullValue());
|
||||
assertThat(clusterState.remove("last_committed_config"), notNullValue());
|
||||
assertThat(clusterState.remove("last_accepted_config"), notNullValue());
|
||||
assertThat(clusterState.keySet(), empty());
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue