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/*
* 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.service;
import com.google.common.collect.Iterables;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.AckedClusterStateTaskListener;
import org.elasticsearch.cluster.ClusterChangedEvent;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterState.Builder;
import org.elasticsearch.cluster.ClusterStateListener;
import org.elasticsearch.cluster.ClusterStateTaskConfig;
import org.elasticsearch.cluster.ClusterStateTaskExecutor;
import org.elasticsearch.cluster.ClusterStateTaskListener;
import org.elasticsearch.cluster.ClusterStateUpdateTask;
import org.elasticsearch.cluster.LocalNodeMasterListener;
import org.elasticsearch.cluster.TimeoutClusterStateListener;
import org.elasticsearch.cluster.block.ClusterBlock;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.metadata.ProcessClusterEventTimeoutException;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodeService;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.OperationRouting;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.component.AbstractLifecycleComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
import org.elasticsearch.common.util.concurrent.CountDown;
import org.elasticsearch.common.util.concurrent.EsExecutors;
import org.elasticsearch.common.util.concurrent.EsRejectedExecutionException;
import org.elasticsearch.common.util.concurrent.FutureUtils;
import org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor;
import org.elasticsearch.common.util.concurrent.PrioritizedRunnable;
import org.elasticsearch.discovery.Discovery;
import org.elasticsearch.discovery.DiscoveryService;
import org.elasticsearch.node.settings.NodeSettingsService;
import org.elasticsearch.tasks.TaskManager;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import static org.elasticsearch.common.util.concurrent.EsExecutors.daemonThreadFactory;
/**
*
*/
public class InternalClusterService extends AbstractLifecycleComponent implements ClusterService {
public static final String SETTING_CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD = "cluster.service.slow_task_logging_threshold";
public static final String SETTING_CLUSTER_SERVICE_RECONNECT_INTERVAL = "cluster.service.reconnect_interval";
public static final String UPDATE_THREAD_NAME = "clusterService#updateTask";
private final ThreadPool threadPool;
private final DiscoveryService discoveryService;
private final OperationRouting operationRouting;
private final TransportService transportService;
private final NodeSettingsService nodeSettingsService;
private final DiscoveryNodeService discoveryNodeService;
private final Version version;
private final TimeValue reconnectInterval;
private TimeValue slowTaskLoggingThreshold;
private volatile PrioritizedEsThreadPoolExecutor updateTasksExecutor;
/**
* Those 3 state listeners are changing infrequently - CopyOnWriteArrayList is just fine
*/
private final Collection priorityClusterStateListeners = new CopyOnWriteArrayList<>();
private final Collection clusterStateListeners = new CopyOnWriteArrayList<>();
private final Collection lastClusterStateListeners = new CopyOnWriteArrayList<>();
// public for tests
public final Map> updateTasksPerExecutor = new HashMap<>();
// TODO this is rather frequently changing I guess a Synced Set would be better here and a dedicated remove API
private final Collection postAppliedListeners = new CopyOnWriteArrayList<>();
private final Iterable preAppliedListeners = Iterables.concat(
priorityClusterStateListeners,
clusterStateListeners,
lastClusterStateListeners);
private final LocalNodeMasterListeners localNodeMasterListeners;
private final Queue onGoingTimeouts = ConcurrentCollections.newQueue();
private volatile ClusterState clusterState;
private final ClusterBlocks.Builder initialBlocks;
private final TaskManager taskManager;
private volatile ScheduledFuture reconnectToNodes;
@Inject
public InternalClusterService(Settings settings, DiscoveryService discoveryService, OperationRouting operationRouting, TransportService transportService,
NodeSettingsService nodeSettingsService, ThreadPool threadPool, ClusterName clusterName, DiscoveryNodeService discoveryNodeService, Version version) {
super(settings);
this.operationRouting = operationRouting;
this.transportService = transportService;
this.discoveryService = discoveryService;
this.threadPool = threadPool;
this.nodeSettingsService = nodeSettingsService;
this.discoveryNodeService = discoveryNodeService;
this.version = version;
// will be replaced on doStart.
this.clusterState = ClusterState.builder(clusterName).build();
this.nodeSettingsService.setClusterService(this);
this.nodeSettingsService.addListener(new ApplySettings());
this.reconnectInterval = this.settings.getAsTime(SETTING_CLUSTER_SERVICE_RECONNECT_INTERVAL, TimeValue.timeValueSeconds(10));
this.slowTaskLoggingThreshold = this.settings.getAsTime(SETTING_CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD, TimeValue.timeValueSeconds(30));
localNodeMasterListeners = new LocalNodeMasterListeners(threadPool);
initialBlocks = ClusterBlocks.builder().addGlobalBlock(discoveryService.getNoMasterBlock());
taskManager = transportService.getTaskManager();
}
public NodeSettingsService settingsService() {
return this.nodeSettingsService;
}
@Override
public void addInitialStateBlock(ClusterBlock block) throws IllegalStateException {
if (lifecycle.started()) {
throw new IllegalStateException("can't set initial block when started");
}
initialBlocks.addGlobalBlock(block);
}
@Override
public void removeInitialStateBlock(ClusterBlock block) throws IllegalStateException {
if (lifecycle.started()) {
throw new IllegalStateException("can't set initial block when started");
}
initialBlocks.removeGlobalBlock(block);
}
@Override
protected void doStart() {
add(localNodeMasterListeners);
add(taskManager);
this.clusterState = ClusterState.builder(clusterState).blocks(initialBlocks).build();
this.updateTasksExecutor = EsExecutors.newSinglePrioritizing(UPDATE_THREAD_NAME, daemonThreadFactory(settings, UPDATE_THREAD_NAME));
this.reconnectToNodes = threadPool.schedule(reconnectInterval, ThreadPool.Names.GENERIC, new ReconnectToNodes());
Map nodeAttributes = discoveryNodeService.buildAttributes();
// note, we rely on the fact that its a new id each time we start, see FD and "kill -9" handling
final String nodeId = DiscoveryService.generateNodeId(settings);
final TransportAddress publishAddress = transportService.boundAddress().publishAddress();
DiscoveryNode localNode = new DiscoveryNode(settings.get("name"), nodeId, publishAddress, nodeAttributes, version);
DiscoveryNodes.Builder nodeBuilder = DiscoveryNodes.builder().put(localNode).localNodeId(localNode.id());
this.clusterState = ClusterState.builder(clusterState).nodes(nodeBuilder).blocks(initialBlocks).build();
this.transportService.setLocalNode(localNode);
}
@Override
protected void doStop() {
FutureUtils.cancel(this.reconnectToNodes);
for (NotifyTimeout onGoingTimeout : onGoingTimeouts) {
onGoingTimeout.cancel();
onGoingTimeout.listener.onClose();
}
ThreadPool.terminate(updateTasksExecutor, 10, TimeUnit.SECONDS);
remove(localNodeMasterListeners);
}
@Override
protected void doClose() {
}
@Override
public DiscoveryNode localNode() {
return clusterState.getNodes().localNode();
}
@Override
public OperationRouting operationRouting() {
return operationRouting;
}
@Override
public ClusterState state() {
return this.clusterState;
}
@Override
public void addFirst(ClusterStateListener listener) {
priorityClusterStateListeners.add(listener);
}
@Override
public void addLast(ClusterStateListener listener) {
lastClusterStateListeners.add(listener);
}
@Override
public void add(ClusterStateListener listener) {
clusterStateListeners.add(listener);
}
@Override
public void remove(ClusterStateListener listener) {
clusterStateListeners.remove(listener);
priorityClusterStateListeners.remove(listener);
lastClusterStateListeners.remove(listener);
postAppliedListeners.remove(listener);
for (Iterator it = onGoingTimeouts.iterator(); it.hasNext(); ) {
NotifyTimeout timeout = it.next();
if (timeout.listener.equals(listener)) {
timeout.cancel();
it.remove();
}
}
}
@Override
public void add(LocalNodeMasterListener listener) {
localNodeMasterListeners.add(listener);
}
@Override
public void remove(LocalNodeMasterListener listener) {
localNodeMasterListeners.remove(listener);
}
@Override
public void add(@Nullable final TimeValue timeout, final TimeoutClusterStateListener listener) {
if (lifecycle.stoppedOrClosed()) {
listener.onClose();
return;
}
// call the post added notification on the same event thread
try {
updateTasksExecutor.execute(new SourcePrioritizedRunnable(Priority.HIGH, "_add_listener_") {
@Override
public void run() {
if (timeout != null) {
NotifyTimeout notifyTimeout = new NotifyTimeout(listener, timeout);
notifyTimeout.future = threadPool.schedule(timeout, ThreadPool.Names.GENERIC, notifyTimeout);
onGoingTimeouts.add(notifyTimeout);
}
postAppliedListeners.add(listener);
listener.postAdded();
}
});
} catch (EsRejectedExecutionException e) {
if (lifecycle.stoppedOrClosed()) {
listener.onClose();
} else {
throw e;
}
}
}
@Override
public void submitStateUpdateTask(final String source, final ClusterStateUpdateTask updateTask) {
submitStateUpdateTask(source, updateTask, updateTask, updateTask, updateTask);
}
@Override
public void submitStateUpdateTask(final String source, final T task,
final ClusterStateTaskConfig config,
final ClusterStateTaskExecutor executor,
final ClusterStateTaskListener listener
) {
innerSubmitStateUpdateTask(source, task, config, executor, safe(listener, logger));
}
private void innerSubmitStateUpdateTask(final String source, final T task,
final ClusterStateTaskConfig config,
final ClusterStateTaskExecutor executor,
final SafeClusterStateTaskListener listener) {
if (!lifecycle.started()) {
return;
}
try {
final UpdateTask updateTask = new UpdateTask<>(source, task, config, executor, listener);
synchronized (updateTasksPerExecutor) {
LinkedHashSet updateTasksForExecutor = updateTasksPerExecutor.get(executor);
if (updateTasksForExecutor == null) {
updateTasksPerExecutor.put(executor, new LinkedHashSet());
}
updateTasksPerExecutor.get(executor).add(updateTask);
}
final TimeValue timeout = config.timeout();
if (timeout != null) {
updateTasksExecutor.execute(updateTask, threadPool.scheduler(), timeout, new Runnable() {
@Override
public void run() {
threadPool.generic().execute(new Runnable() {
@Override
public void run() {
if (updateTask.processed.getAndSet(true) == false) {
synchronized (updateTasksPerExecutor) {
LinkedHashSet existingTasks = updateTasksPerExecutor.get(executor);
if (existingTasks != null) {
existingTasks.remove(updateTask);
if (existingTasks.isEmpty()) {
updateTasksPerExecutor.remove(executor);
}
}
}
listener.onFailure(source, new ProcessClusterEventTimeoutException(config.timeout(), source));
}
}
});
}
});
} else {
updateTasksExecutor.execute(updateTask);
}
} catch (EsRejectedExecutionException e) {
// ignore cases where we are shutting down..., there is really nothing interesting
// to be done here...
if (!lifecycle.stoppedOrClosed()) {
throw e;
}
}
}
@Override
public List pendingTasks() {
PrioritizedEsThreadPoolExecutor.Pending[] pendings = updateTasksExecutor.getPending();
List pendingClusterTasks = new ArrayList<>(pendings.length);
for (PrioritizedEsThreadPoolExecutor.Pending pending : pendings) {
final String source;
final long timeInQueue;
// we have to capture the task as it will be nulled after execution and we don't want to change while we check things here.
final Object task = pending.task;
if (task == null) {
continue;
} else if (task instanceof SourcePrioritizedRunnable) {
SourcePrioritizedRunnable runnable = (SourcePrioritizedRunnable) task;
source = runnable.source();
timeInQueue = runnable.getAgeInMillis();
} else {
assert false : "expected SourcePrioritizedRunnable got " + task.getClass();
source = "unknown [" + task.getClass() + "]";
timeInQueue = 0;
}
pendingClusterTasks.add(new PendingClusterTask(pending.insertionOrder, pending.priority, new Text(source), timeInQueue, pending.executing));
}
return pendingClusterTasks;
}
@Override
public int numberOfPendingTasks() {
return updateTasksExecutor.getNumberOfPendingTasks();
}
@Override
public TimeValue getMaxTaskWaitTime() {
return updateTasksExecutor.getMaxTaskWaitTime();
}
@Override
public TaskManager getTaskManager() {
return taskManager;
}
/** asserts that the current thread is the cluster state update thread */
public boolean assertClusterStateThread() {
assert Thread.currentThread().getName().contains(InternalClusterService.UPDATE_THREAD_NAME) : "not called from the cluster state update thread";
return true;
}
static abstract class SourcePrioritizedRunnable extends PrioritizedRunnable {
protected final String source;
public SourcePrioritizedRunnable(Priority priority, String source) {
super(priority);
this.source = source;
}
public String source() {
return source;
}
}
void runTasksForExecutor(ClusterStateTaskExecutor executor) {
final ArrayList> toExecute = new ArrayList<>();
final ArrayList sources = new ArrayList<>();
synchronized (updateTasksPerExecutor) {
LinkedHashSet pending = updateTasksPerExecutor.remove(executor);
if (pending != null) {
for (UpdateTask task : pending) {
if (task.processed.getAndSet(true) == false) {
logger.trace("will process [{}]", task.source);
toExecute.add(task);
sources.add(task.source);
} else {
logger.trace("skipping [{}], already processed", task.source);
}
}
}
}
if (toExecute.isEmpty()) {
return;
}
final String source = Strings.collectionToCommaDelimitedString(sources);
if (!lifecycle.started()) {
logger.debug("processing [{}]: ignoring, cluster_service not started", source);
return;
}
logger.debug("processing [{}]: execute", source);
ClusterState previousClusterState = clusterState;
if (!previousClusterState.nodes().localNodeMaster() && executor.runOnlyOnMaster()) {
logger.debug("failing [{}]: local node is no longer master", source);
for (UpdateTask updateTask : toExecute) {
updateTask.listener.onNoLongerMaster(updateTask.source);
}
return;
}
ClusterStateTaskExecutor.BatchResult batchResult;
long startTimeNS = System.nanoTime();
List inputs = new ArrayList<>();
for (UpdateTask updateTask : toExecute) {
inputs.add(updateTask.task);
}
try {
batchResult = executor.execute(previousClusterState, inputs);
} catch (Throwable e) {
TimeValue executionTime = TimeValue.timeValueMillis(Math.max(0, TimeValue.nsecToMSec(System.nanoTime() - startTimeNS)));
if (logger.isTraceEnabled()) {
StringBuilder sb = new StringBuilder("failed to execute cluster state update in ").append(executionTime).append(", state:\nversion [").append(previousClusterState.version()).append("], source [").append(source).append("]\n");
sb.append(previousClusterState.nodes().prettyPrint());
sb.append(previousClusterState.routingTable().prettyPrint());
sb.append(previousClusterState.getRoutingNodes().prettyPrint());
logger.trace(sb.toString(), e);
}
warnAboutSlowTaskIfNeeded(executionTime, source);
batchResult = ClusterStateTaskExecutor.BatchResult.builder().failures(inputs, e).build(previousClusterState);
}
assert batchResult.executionResults != null;
assert batchResult.executionResults.size() == toExecute.size()
: String.format(Locale.ROOT, "expected [%d] task result%s but was [%d]", toExecute.size(), toExecute.size() == 1 ? "" : "s", batchResult.executionResults.size());
boolean assertsEnabled = false;
assert (assertsEnabled = true);
if (assertsEnabled) {
for (UpdateTask updateTask : toExecute) {
assert batchResult.executionResults.containsKey(updateTask.task) : "missing task result for [" + updateTask.task + "]";
}
}
ClusterState newClusterState = batchResult.resultingState;
final ArrayList> proccessedListeners = new ArrayList<>();
// fail all tasks that have failed and extract those that are waiting for results
for (final UpdateTask updateTask : toExecute) {
assert batchResult.executionResults.containsKey(updateTask.task) : "missing " + updateTask.task.toString();
final ClusterStateTaskExecutor.TaskResult executionResult =
batchResult.executionResults.get(updateTask.task);
executionResult.handle(
new Runnable() {
@Override
public void run() {
proccessedListeners.add(updateTask);
}
},
new ClusterStateTaskExecutor.TaskResult.FailureConsumer() {
@Override
public void accept(Throwable ex) {
logger.debug("cluster state update task [{}] failed", ex, updateTask.source);
updateTask.listener.onFailure(updateTask.source, ex);
}
}
);
}
if (previousClusterState == newClusterState) {
for (UpdateTask task : proccessedListeners) {
if (task.listener instanceof AckedClusterStateTaskListener) {
//no need to wait for ack if nothing changed, the update can be counted as acknowledged
((AckedClusterStateTaskListener) task.listener).onAllNodesAcked(null);
}
task.listener.clusterStateProcessed(task.source, previousClusterState, newClusterState);
}
TimeValue executionTime = TimeValue.timeValueMillis(Math.max(0, TimeValue.nsecToMSec(System.nanoTime() - startTimeNS)));
logger.debug("processing [{}]: took {} no change in cluster_state", source, executionTime);
warnAboutSlowTaskIfNeeded(executionTime, source);
return;
}
try {
ArrayList ackListeners = new ArrayList<>();
if (newClusterState.nodes().localNodeMaster()) {
// only the master controls the version numbers
Builder builder = ClusterState.builder(newClusterState).incrementVersion();
if (previousClusterState.routingTable() != newClusterState.routingTable()) {
builder.routingTable(RoutingTable.builder(newClusterState.routingTable()).version(newClusterState.routingTable().version() + 1).build());
}
if (previousClusterState.metaData() != newClusterState.metaData()) {
builder.metaData(MetaData.builder(newClusterState.metaData()).version(newClusterState.metaData().version() + 1));
}
newClusterState = builder.build();
for (UpdateTask task : proccessedListeners) {
if (task.listener instanceof AckedClusterStateTaskListener) {
final AckedClusterStateTaskListener ackedListener = (AckedClusterStateTaskListener) task.listener;
if (ackedListener.ackTimeout() == null || ackedListener.ackTimeout().millis() == 0) {
ackedListener.onAckTimeout();
} else {
try {
ackListeners.add(new AckCountDownListener(ackedListener, newClusterState.version(), newClusterState.nodes(), threadPool));
} catch (EsRejectedExecutionException ex) {
if (logger.isDebugEnabled()) {
logger.debug("Couldn't schedule timeout thread - node might be shutting down", ex);
}
//timeout straightaway, otherwise we could wait forever as the timeout thread has not started
ackedListener.onAckTimeout();
}
}
}
}
}
final Discovery.AckListener ackListener = new DelegetingAckListener(ackListeners);
newClusterState.status(ClusterState.ClusterStateStatus.BEING_APPLIED);
if (logger.isTraceEnabled()) {
StringBuilder sb = new StringBuilder("cluster state updated, source [").append(source).append("]\n");
sb.append(newClusterState.prettyPrint());
logger.trace(sb.toString());
} else if (logger.isDebugEnabled()) {
logger.debug("cluster state updated, version [{}], source [{}]", newClusterState.version(), source);
}
ClusterChangedEvent clusterChangedEvent = new ClusterChangedEvent(source, newClusterState, previousClusterState);
// new cluster state, notify all listeners
final DiscoveryNodes.Delta nodesDelta = clusterChangedEvent.nodesDelta();
if (nodesDelta.hasChanges() && logger.isInfoEnabled()) {
String summary = nodesDelta.shortSummary();
if (summary.length() > 0) {
logger.info("{}, reason: {}", summary, source);
}
}
// TODO, do this in parallel (and wait)
for (DiscoveryNode node : nodesDelta.addedNodes()) {
if (!nodeRequiresConnection(node)) {
continue;
}
try {
transportService.connectToNode(node);
} catch (Throwable e) {
// the fault detection will detect it as failed as well
logger.warn("failed to connect to node [" + node + "]", e);
}
}
// if we are the master, publish the new state to all nodes
// we publish here before we send a notification to all the listeners, since if it fails
// we don't want to notify
if (newClusterState.nodes().localNodeMaster()) {
logger.debug("publishing cluster state version [{}]", newClusterState.version());
discoveryService.publish(clusterChangedEvent, ackListener);
}
// update the current cluster state
clusterState = newClusterState;
logger.debug("set local cluster state to version {}", newClusterState.version());
for (ClusterStateListener listener : preAppliedListeners) {
try {
listener.clusterChanged(clusterChangedEvent);
} catch (Exception ex) {
logger.warn("failed to notify ClusterStateListener", ex);
}
}
for (DiscoveryNode node : nodesDelta.removedNodes()) {
try {
transportService.disconnectFromNode(node);
} catch (Throwable e) {
logger.warn("failed to disconnect to node [" + node + "]", e);
}
}
newClusterState.status(ClusterState.ClusterStateStatus.APPLIED);
for (ClusterStateListener listener : postAppliedListeners) {
try {
listener.clusterChanged(clusterChangedEvent);
} catch (Exception ex) {
logger.warn("failed to notify ClusterStateListener", ex);
}
}
//manual ack only from the master at the end of the publish
if (newClusterState.nodes().localNodeMaster()) {
try {
ackListener.onNodeAck(newClusterState.nodes().localNode(), null);
} catch (Throwable t) {
logger.debug("error while processing ack for master node [{}]", t, newClusterState.nodes().localNode());
}
}
for (UpdateTask task : proccessedListeners) {
task.listener.clusterStateProcessed(task.source, previousClusterState, newClusterState);
}
executor.clusterStatePublished(newClusterState);
TimeValue executionTime = TimeValue.timeValueMillis(Math.max(0, TimeValue.nsecToMSec(System.nanoTime() - startTimeNS)));
logger.debug("processing [{}]: took {} done applying updated cluster_state (version: {}, uuid: {})", source, executionTime, newClusterState.version(), newClusterState.stateUUID());
warnAboutSlowTaskIfNeeded(executionTime, source);
} catch (Throwable t) {
TimeValue executionTime = TimeValue.timeValueMillis(Math.max(0, TimeValue.nsecToMSec(System.nanoTime() - startTimeNS)));
StringBuilder sb = new StringBuilder("failed to apply updated cluster state in ").append(executionTime).append(":\nversion [").append(newClusterState.version()).append("], uuid [").append(newClusterState.stateUUID()).append("], source [").append(source).append("]\n");
sb.append(newClusterState.nodes().prettyPrint());
sb.append(newClusterState.routingTable().prettyPrint());
sb.append(newClusterState.getRoutingNodes().prettyPrint());
logger.warn(sb.toString(), t);
// TODO: do we want to call updateTask.onFailure here?
}
}
private static SafeClusterStateTaskListener safe(ClusterStateTaskListener listener, ESLogger logger) {
if (listener instanceof AckedClusterStateTaskListener) {
return new SafeAckedClusterStateTaskListener((AckedClusterStateTaskListener) listener, logger);
} else {
return new SafeClusterStateTaskListener(listener, logger);
}
}
private static class SafeClusterStateTaskListener implements ClusterStateTaskListener {
private final ClusterStateTaskListener listener;
private final ESLogger logger;
public SafeClusterStateTaskListener(ClusterStateTaskListener listener, ESLogger logger) {
this.listener = listener;
this.logger = logger;
}
@Override
public void onFailure(String source, Throwable t) {
try {
listener.onFailure(source, t);
} catch (Exception e) {
logger.error("exception thrown by listener notifying of failure [{}] from [{}]", e, t, source);
}
}
@Override
public void onNoLongerMaster(String source) {
try {
listener.onNoLongerMaster(source);
} catch (Exception e) {
logger.error("exception thrown by listener while notifying no longer master from [{}]", e, source);
}
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, ClusterState newState) {
try {
listener.clusterStateProcessed(source, oldState, newState);
} catch (Exception e) {
logger.error(
"exception thrown by listener while notifying of cluster state processed from [{}], old cluster state:\n{}\nnew cluster state:\n{}",
e,
source,
oldState.prettyPrint(),
newState.prettyPrint());
}
}
}
private static class SafeAckedClusterStateTaskListener extends SafeClusterStateTaskListener implements AckedClusterStateTaskListener {
private final AckedClusterStateTaskListener listener;
private final ESLogger logger;
public SafeAckedClusterStateTaskListener(AckedClusterStateTaskListener listener, ESLogger logger) {
super(listener, logger);
this.listener = listener;
this.logger = logger;
}
@Override
public boolean mustAck(DiscoveryNode discoveryNode) {
return listener.mustAck(discoveryNode);
}
@Override
public void onAllNodesAcked(@Nullable Throwable t) {
try {
listener.onAllNodesAcked(t);
} catch (Exception e) {
logger.error("exception thrown by listener while notifying on all nodes acked [{}]", e, t);
}
}
@Override
public void onAckTimeout() {
try {
listener.onAckTimeout();
} catch (Exception e) {
logger.error("exception thrown by listener while notifying on ack timeout", e);
}
}
@Override
public TimeValue ackTimeout() {
return listener.ackTimeout();
}
}
class UpdateTask extends SourcePrioritizedRunnable {
public final T task;
public final ClusterStateTaskConfig config;
public final ClusterStateTaskExecutor executor;
public final ClusterStateTaskListener listener;
public final AtomicBoolean processed = new AtomicBoolean();
UpdateTask(String source, T task, ClusterStateTaskConfig config, ClusterStateTaskExecutor executor, ClusterStateTaskListener listener) {
super(config.priority(), source);
this.task = task;
this.config = config;
this.executor = executor;
this.listener = listener;
}
@Override
public void run() {
runTasksForExecutor(executor);
}
}
private void warnAboutSlowTaskIfNeeded(TimeValue executionTime, String source) {
if (executionTime.getMillis() > slowTaskLoggingThreshold.getMillis()) {
logger.warn("cluster state update task [{}] took {} above the warn threshold of {}", source, executionTime, slowTaskLoggingThreshold);
}
}
class NotifyTimeout implements Runnable {
final TimeoutClusterStateListener listener;
final TimeValue timeout;
volatile ScheduledFuture future;
NotifyTimeout(TimeoutClusterStateListener listener, TimeValue timeout) {
this.listener = listener;
this.timeout = timeout;
}
public void cancel() {
FutureUtils.cancel(future);
}
@Override
public void run() {
if (future != null && future.isCancelled()) {
return;
}
if (lifecycle.stoppedOrClosed()) {
listener.onClose();
} else {
listener.onTimeout(this.timeout);
}
// note, we rely on the listener to remove itself in case of timeout if needed
}
}
private class ReconnectToNodes implements Runnable {
private ConcurrentMap failureCount = ConcurrentCollections.newConcurrentMap();
@Override
public void run() {
// master node will check against all nodes if its alive with certain discoveries implementations,
// but we can't rely on that, so we check on it as well
for (DiscoveryNode node : clusterState.nodes()) {
if (lifecycle.stoppedOrClosed()) {
return;
}
if (!nodeRequiresConnection(node)) {
continue;
}
if (clusterState.nodes().nodeExists(node.id())) { // we double check existence of node since connectToNode might take time...
if (!transportService.nodeConnected(node)) {
try {
transportService.connectToNode(node);
} catch (Exception e) {
if (lifecycle.stoppedOrClosed()) {
return;
}
if (clusterState.nodes().nodeExists(node.id())) { // double check here as well, maybe its gone?
Integer nodeFailureCount = failureCount.get(node);
if (nodeFailureCount == null) {
nodeFailureCount = 1;
} else {
nodeFailureCount = nodeFailureCount + 1;
}
// log every 6th failure
if ((nodeFailureCount % 6) == 0) {
// reset the failure count...
nodeFailureCount = 0;
logger.warn("failed to reconnect to node {}", e, node);
}
failureCount.put(node, nodeFailureCount);
}
}
}
}
}
// go over and remove failed nodes that have been removed
DiscoveryNodes nodes = clusterState.nodes();
for (Iterator failedNodesIt = failureCount.keySet().iterator(); failedNodesIt.hasNext(); ) {
DiscoveryNode failedNode = failedNodesIt.next();
if (!nodes.nodeExists(failedNode.id())) {
failedNodesIt.remove();
}
}
if (lifecycle.started()) {
reconnectToNodes = threadPool.schedule(reconnectInterval, ThreadPool.Names.GENERIC, this);
}
}
}
private boolean nodeRequiresConnection(DiscoveryNode node) {
return localNode().shouldConnectTo(node);
}
private static class LocalNodeMasterListeners implements ClusterStateListener {
private final List listeners = new CopyOnWriteArrayList<>();
private final ThreadPool threadPool;
private volatile boolean master = false;
private LocalNodeMasterListeners(ThreadPool threadPool) {
this.threadPool = threadPool;
}
@Override
public void clusterChanged(ClusterChangedEvent event) {
if (!master && event.localNodeMaster()) {
master = true;
for (LocalNodeMasterListener listener : listeners) {
Executor executor = threadPool.executor(listener.executorName());
executor.execute(new OnMasterRunnable(listener));
}
return;
}
if (master && !event.localNodeMaster()) {
master = false;
for (LocalNodeMasterListener listener : listeners) {
Executor executor = threadPool.executor(listener.executorName());
executor.execute(new OffMasterRunnable(listener));
}
}
}
private void add(LocalNodeMasterListener listener) {
listeners.add(listener);
}
private void remove(LocalNodeMasterListener listener) {
listeners.remove(listener);
}
private void clear() {
listeners.clear();
}
}
private static class OnMasterRunnable implements Runnable {
private final LocalNodeMasterListener listener;
private OnMasterRunnable(LocalNodeMasterListener listener) {
this.listener = listener;
}
@Override
public void run() {
listener.onMaster();
}
}
private static class OffMasterRunnable implements Runnable {
private final LocalNodeMasterListener listener;
private OffMasterRunnable(LocalNodeMasterListener listener) {
this.listener = listener;
}
@Override
public void run() {
listener.offMaster();
}
}
private static class DelegetingAckListener implements Discovery.AckListener {
final private List listeners;
private DelegetingAckListener(List listeners) {
this.listeners = listeners;
}
@Override
public void onNodeAck(DiscoveryNode node, @Nullable Throwable t) {
for (Discovery.AckListener listener : listeners) {
listener.onNodeAck(node, t);
}
}
@Override
public void onTimeout() {
throw new UnsupportedOperationException("no timeout delegation");
}
}
private static class AckCountDownListener implements Discovery.AckListener {
private static final ESLogger logger = Loggers.getLogger(AckCountDownListener.class);
private final AckedClusterStateTaskListener ackedTaskListener;
private final CountDown countDown;
private final DiscoveryNodes nodes;
private final long clusterStateVersion;
private final Future ackTimeoutCallback;
private Throwable lastFailure;
AckCountDownListener(AckedClusterStateTaskListener ackedTaskListener, long clusterStateVersion, DiscoveryNodes nodes, ThreadPool threadPool) {
this.ackedTaskListener = ackedTaskListener;
this.clusterStateVersion = clusterStateVersion;
this.nodes = nodes;
int countDown = 0;
for (DiscoveryNode node : nodes) {
if (ackedTaskListener.mustAck(node)) {
countDown++;
}
}
//we always wait for at least 1 node (the master)
countDown = Math.max(1, countDown);
logger.trace("expecting {} acknowledgements for cluster_state update (version: {})", countDown, clusterStateVersion);
this.countDown = new CountDown(countDown);
this.ackTimeoutCallback = threadPool.schedule(ackedTaskListener.ackTimeout(), ThreadPool.Names.GENERIC, new Runnable() {
@Override
public void run() {
onTimeout();
}
});
}
@Override
public void onNodeAck(DiscoveryNode node, @Nullable Throwable t) {
if (!ackedTaskListener.mustAck(node)) {
//we always wait for the master ack anyway
if (!node.equals(nodes.masterNode())) {
return;
}
}
if (t == null) {
logger.trace("ack received from node [{}], cluster_state update (version: {})", node, clusterStateVersion);
} else {
this.lastFailure = t;
logger.debug("ack received from node [{}], cluster_state update (version: {})", t, node, clusterStateVersion);
}
if (countDown.countDown()) {
logger.trace("all expected nodes acknowledged cluster_state update (version: {})", clusterStateVersion);
FutureUtils.cancel(ackTimeoutCallback);
ackedTaskListener.onAllNodesAcked(lastFailure);
}
}
@Override
public void onTimeout() {
if (countDown.fastForward()) {
logger.trace("timeout waiting for acknowledgement for cluster_state update (version: {})", clusterStateVersion);
ackedTaskListener.onAckTimeout();
}
}
}
class ApplySettings implements NodeSettingsService.Listener {
@Override
public void onRefreshSettings(Settings settings) {
final TimeValue slowTaskLoggingThreshold = settings.getAsTime(SETTING_CLUSTER_SERVICE_SLOW_TASK_LOGGING_THRESHOLD, InternalClusterService.this.slowTaskLoggingThreshold);
InternalClusterService.this.slowTaskLoggingThreshold = slowTaskLoggingThreshold;
}
}
}