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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.apache.cassandra.service;
import java.io.IOException;
import java.net.UnknownHostException;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.management.openmbean.CompositeData;
import java.util.function.Predicate;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Multimap;
import com.google.common.util.concurrent.AbstractFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import org.apache.cassandra.db.compaction.CompactionManager;
import org.apache.cassandra.locator.EndpointsByRange;
import org.apache.cassandra.locator.EndpointsForRange;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.concurrent.JMXEnabledThreadPoolExecutor;
import org.apache.cassandra.concurrent.NamedThreadFactory;
import org.apache.cassandra.concurrent.ScheduledExecutors;
import org.apache.cassandra.config.Config;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.exceptions.RequestFailureReason;
import org.apache.cassandra.gms.ApplicationState;
import org.apache.cassandra.gms.EndpointState;
import org.apache.cassandra.gms.FailureDetector;
import org.apache.cassandra.gms.Gossiper;
import org.apache.cassandra.gms.IEndpointStateChangeSubscriber;
import org.apache.cassandra.gms.IFailureDetectionEventListener;
import org.apache.cassandra.gms.IFailureDetector;
import org.apache.cassandra.gms.VersionedValue;
import org.apache.cassandra.locator.InetAddressAndPort;
import org.apache.cassandra.locator.TokenMetadata;
import org.apache.cassandra.metrics.RepairMetrics;
import org.apache.cassandra.net.RequestCallback;
import org.apache.cassandra.net.Verb;
import org.apache.cassandra.net.Message;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.repair.CommonRange;
import org.apache.cassandra.repair.RepairJobDesc;
import org.apache.cassandra.repair.RepairParallelism;
import org.apache.cassandra.repair.RepairSession;
import org.apache.cassandra.repair.consistent.CoordinatorSessions;
import org.apache.cassandra.repair.consistent.LocalSessions;
import org.apache.cassandra.repair.consistent.admin.CleanupSummary;
import org.apache.cassandra.repair.consistent.admin.PendingStats;
import org.apache.cassandra.repair.consistent.admin.RepairStats;
import org.apache.cassandra.repair.consistent.RepairedState;
import org.apache.cassandra.repair.consistent.admin.SchemaArgsParser;
import org.apache.cassandra.repair.messages.CleanupMessage;
import org.apache.cassandra.repair.messages.PrepareMessage;
import org.apache.cassandra.repair.messages.RepairMessage;
import org.apache.cassandra.repair.messages.RepairOption;
import org.apache.cassandra.repair.messages.SyncResponse;
import org.apache.cassandra.repair.messages.ValidationResponse;
import org.apache.cassandra.schema.TableId;
import org.apache.cassandra.streaming.PreviewKind;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.MBeanWrapper;
import org.apache.cassandra.utils.Pair;
import org.apache.cassandra.utils.UUIDGen;
import static com.google.common.collect.Iterables.concat;
import static com.google.common.collect.Iterables.transform;
import static org.apache.cassandra.net.Verb.PREPARE_MSG;
/**
* ActiveRepairService is the starting point for manual "active" repairs.
*
* Each user triggered repair will correspond to one or multiple repair session,
* one for each token range to repair. On repair session might repair multiple
* column families. For each of those column families, the repair session will
* request merkle trees for each replica of the range being repaired, diff those
* trees upon receiving them, schedule the streaming ofthe parts to repair (based on
* the tree diffs) and wait for all those operation. See RepairSession for more
* details.
*
* The creation of a repair session is done through the submitRepairSession that
* returns a future on the completion of that session.
*/
public class ActiveRepairService implements IEndpointStateChangeSubscriber, IFailureDetectionEventListener, ActiveRepairServiceMBean
{
public enum ParentRepairStatus
{
IN_PROGRESS, COMPLETED, FAILED
}
public static class ConsistentSessions
{
public final LocalSessions local = new LocalSessions();
public final CoordinatorSessions coordinated = new CoordinatorSessions();
}
public final ConsistentSessions consistent = new ConsistentSessions();
private boolean registeredForEndpointChanges = false;
private static final Logger logger = LoggerFactory.getLogger(ActiveRepairService.class);
// singleton enforcement
public static final ActiveRepairService instance = new ActiveRepairService(FailureDetector.instance, Gossiper.instance);
public static final long UNREPAIRED_SSTABLE = 0;
public static final UUID NO_PENDING_REPAIR = null;
/**
* A map of active coordinator session.
*/
private final ConcurrentMap sessions = new ConcurrentHashMap<>();
private final ConcurrentMap parentRepairSessions = new ConcurrentHashMap<>();
static
{
RepairMetrics.init();
}
public static class RepairCommandExecutorHandle
{
private static final ThreadPoolExecutor repairCommandExecutor =
initializeExecutor(DatabaseDescriptor.getRepairCommandPoolSize(),
DatabaseDescriptor.getRepairCommandPoolFullStrategy());
}
@VisibleForTesting
static ThreadPoolExecutor initializeExecutor(int maxPoolSize, Config.RepairCommandPoolFullStrategy strategy)
{
int corePoolSize = 1;
BlockingQueue queue;
if (strategy == Config.RepairCommandPoolFullStrategy.reject)
{
// new threads will be created on demand up to max pool
// size so we can leave corePoolSize at 1 to start with
queue = new SynchronousQueue<>();
}
else
{
// new threads are only created if > corePoolSize threads are running
// and the queue is full, so set corePoolSize to the desired max as the
// queue will _never_ be full. Idle core threads will eventually time
// out and may be re-created if/when subsequent tasks are submitted.
corePoolSize = maxPoolSize;
queue = new LinkedBlockingQueue<>();
}
ThreadPoolExecutor executor = new JMXEnabledThreadPoolExecutor(corePoolSize,
maxPoolSize,
1,
TimeUnit.HOURS,
queue,
new NamedThreadFactory("Repair-Task"),
"internal",
new ThreadPoolExecutor.AbortPolicy());
// allow idle core threads to be terminated
executor.allowCoreThreadTimeOut(true);
return executor;
}
public static ThreadPoolExecutor repairCommandExecutor()
{
return RepairCommandExecutorHandle.repairCommandExecutor;
}
private final IFailureDetector failureDetector;
private final Gossiper gossiper;
private final Cache>> repairStatusByCmd;
public ActiveRepairService(IFailureDetector failureDetector, Gossiper gossiper)
{
this.failureDetector = failureDetector;
this.gossiper = gossiper;
this.repairStatusByCmd = CacheBuilder.newBuilder()
.expireAfterWrite(
Long.getLong("cassandra.parent_repair_status_expiry_seconds",
TimeUnit.SECONDS.convert(1, TimeUnit.DAYS)), TimeUnit.SECONDS)
// using weight wouldn't work so well, since it doesn't reflect mutation of cached data
// see https://github.com/google/guava/wiki/CachesExplained
// We assume each entry is unlikely to be much more than 100 bytes, so bounding the size should be sufficient.
.maximumSize(Long.getLong("cassandra.parent_repair_status_cache_size", 100_000))
.build();
MBeanWrapper.instance.registerMBean(this, MBEAN_NAME);
}
public void start()
{
consistent.local.start();
ScheduledExecutors.optionalTasks.scheduleAtFixedRate(consistent.local::cleanup, 0,
LocalSessions.CLEANUP_INTERVAL,
TimeUnit.SECONDS);
}
public void stop()
{
consistent.local.stop();
}
@Override
public List> getSessions(boolean all, String rangesStr)
{
Set> ranges = RepairOption.parseRanges(rangesStr, DatabaseDescriptor.getPartitioner());
return consistent.local.sessionInfo(all, ranges);
}
@Override
public void failSession(String session, boolean force)
{
UUID sessionID = UUID.fromString(session);
consistent.local.cancelSession(sessionID, force);
}
@Override
public void setRepairSessionSpaceInMegabytes(int sizeInMegabytes)
{
DatabaseDescriptor.setRepairSessionSpaceInMegabytes(sizeInMegabytes);
}
@Override
public int getRepairSessionSpaceInMegabytes()
{
return DatabaseDescriptor.getRepairSessionSpaceInMegabytes();
}
public List getRepairStats(List schemaArgs, String rangeString)
{
List stats = new ArrayList<>();
Collection> userRanges = rangeString != null
? RepairOption.parseRanges(rangeString, DatabaseDescriptor.getPartitioner())
: null;
for (ColumnFamilyStore cfs : SchemaArgsParser.parse(schemaArgs))
{
String keyspace = cfs.keyspace.getName();
Collection> ranges = userRanges != null
? userRanges
: StorageService.instance.getLocalReplicas(keyspace).ranges();
RepairedState.Stats cfStats = consistent.local.getRepairedStats(cfs.metadata().id, ranges);
stats.add(RepairStats.fromRepairState(keyspace, cfs.name, cfStats).toComposite());
}
return stats;
}
@Override
public List getPendingStats(List schemaArgs, String rangeString)
{
List stats = new ArrayList<>();
Collection> userRanges = rangeString != null
? RepairOption.parseRanges(rangeString, DatabaseDescriptor.getPartitioner())
: null;
for (ColumnFamilyStore cfs : SchemaArgsParser.parse(schemaArgs))
{
String keyspace = cfs.keyspace.getName();
Collection> ranges = userRanges != null
? userRanges
: StorageService.instance.getLocalReplicas(keyspace).ranges();
PendingStats cfStats = consistent.local.getPendingStats(cfs.metadata().id, ranges);
stats.add(cfStats.toComposite());
}
return stats;
}
@Override
public List cleanupPending(List schemaArgs, String rangeString, boolean force)
{
List stats = new ArrayList<>();
Collection> userRanges = rangeString != null
? RepairOption.parseRanges(rangeString, DatabaseDescriptor.getPartitioner())
: null;
for (ColumnFamilyStore cfs : SchemaArgsParser.parse(schemaArgs))
{
String keyspace = cfs.keyspace.getName();
Collection> ranges = userRanges != null
? userRanges
: StorageService.instance.getLocalReplicas(keyspace).ranges();
CleanupSummary summary = consistent.local.cleanup(cfs.metadata().id, ranges, force);
stats.add(summary.toComposite());
}
return stats;
}
@Override
public int parentRepairSessionsCount()
{
return parentRepairSessions.size();
}
/**
* Requests repairs for the given keyspace and column families.
*
* @return Future for asynchronous call or null if there is no need to repair
*/
public RepairSession submitRepairSession(UUID parentRepairSession,
CommonRange range,
String keyspace,
RepairParallelism parallelismDegree,
boolean isIncremental,
boolean pullRepair,
PreviewKind previewKind,
boolean optimiseStreams,
ListeningExecutorService executor,
String... cfnames)
{
if (range.endpoints.isEmpty())
return null;
if (cfnames.length == 0)
return null;
final RepairSession session = new RepairSession(parentRepairSession, UUIDGen.getTimeUUID(), range, keyspace,
parallelismDegree, isIncremental, pullRepair,
previewKind, optimiseStreams, cfnames);
sessions.put(session.getId(), session);
// register listeners
registerOnFdAndGossip(session);
if (session.previewKind == PreviewKind.REPAIRED)
LocalSessions.registerListener(session);
// remove session at completion
session.addListener(new Runnable()
{
/**
* When repair finished, do clean up
*/
public void run()
{
sessions.remove(session.getId());
LocalSessions.unregisterListener(session);
}
}, MoreExecutors.directExecutor());
session.start(executor);
return session;
}
public boolean getUseOffheapMerkleTrees()
{
return DatabaseDescriptor.useOffheapMerkleTrees();
}
public void setUseOffheapMerkleTrees(boolean value)
{
DatabaseDescriptor.useOffheapMerkleTrees(value);
}
private void registerOnFdAndGossip(final T task)
{
gossiper.register(task);
failureDetector.registerFailureDetectionEventListener(task);
// unregister listeners at completion
task.addListener(new Runnable()
{
/**
* When repair finished, do clean up
*/
public void run()
{
failureDetector.unregisterFailureDetectionEventListener(task);
gossiper.unregister(task);
}
}, MoreExecutors.directExecutor());
}
public synchronized void terminateSessions()
{
Throwable cause = new IOException("Terminate session is called");
for (RepairSession session : sessions.values())
{
session.forceShutdown(cause);
}
parentRepairSessions.clear();
}
public void recordRepairStatus(int cmd, ParentRepairStatus parentRepairStatus, List messages)
{
repairStatusByCmd.put(cmd, Pair.create(parentRepairStatus, messages));
}
Pair> getRepairStatus(Integer cmd)
{
return repairStatusByCmd.getIfPresent(cmd);
}
/**
* Return all of the neighbors with whom we share the provided range.
*
* @param keyspaceName keyspace to repair
* @param keyspaceLocalRanges local-range for given keyspaceName
* @param toRepair token to repair
* @param dataCenters the data centers to involve in the repair
*
* @return neighbors with whom we share the provided range
*/
public static EndpointsForRange getNeighbors(String keyspaceName, Iterable> keyspaceLocalRanges,
Range toRepair, Collection dataCenters,
Collection hosts)
{
StorageService ss = StorageService.instance;
EndpointsByRange replicaSets = ss.getRangeToAddressMap(keyspaceName);
Range rangeSuperSet = null;
for (Range range : keyspaceLocalRanges)
{
if (range.contains(toRepair))
{
rangeSuperSet = range;
break;
}
else if (range.intersects(toRepair))
{
throw new IllegalArgumentException(String.format("Requested range %s intersects a local range (%s) " +
"but is not fully contained in one; this would lead to " +
"imprecise repair. keyspace: %s", toRepair.toString(),
range.toString(), keyspaceName));
}
}
if (rangeSuperSet == null || !replicaSets.containsKey(rangeSuperSet))
return EndpointsForRange.empty(toRepair);
EndpointsForRange neighbors = replicaSets.get(rangeSuperSet).withoutSelf();
if (dataCenters != null && !dataCenters.isEmpty())
{
TokenMetadata.Topology topology = ss.getTokenMetadata().cloneOnlyTokenMap().getTopology();
Multimap dcEndpointsMap = topology.getDatacenterEndpoints();
Iterable dcEndpoints = concat(transform(dataCenters, dcEndpointsMap::get));
return neighbors.select(dcEndpoints, true);
}
else if (hosts != null && !hosts.isEmpty())
{
Set specifiedHost = new HashSet<>();
for (final String host : hosts)
{
try
{
final InetAddressAndPort endpoint = InetAddressAndPort.getByName(host.trim());
if (endpoint.equals(FBUtilities.getBroadcastAddressAndPort()) || neighbors.endpoints().contains(endpoint))
specifiedHost.add(endpoint);
}
catch (UnknownHostException e)
{
throw new IllegalArgumentException("Unknown host specified " + host, e);
}
}
if (!specifiedHost.contains(FBUtilities.getBroadcastAddressAndPort()))
throw new IllegalArgumentException("The current host must be part of the repair");
if (specifiedHost.size() <= 1)
{
String msg = "Specified hosts %s do not share range %s needed for repair. Either restrict repair ranges " +
"with -st/-et options, or specify one of the neighbors that share this range with " +
"this node: %s.";
throw new IllegalArgumentException(String.format(msg, hosts, toRepair, neighbors));
}
specifiedHost.remove(FBUtilities.getBroadcastAddressAndPort());
return neighbors.keep(specifiedHost);
}
return neighbors;
}
/**
* we only want to set repairedAt for incremental repairs including all replicas for a token range. For non-global
* incremental repairs, forced incremental repairs, and full repairs, the UNREPAIRED_SSTABLE value will prevent
* sstables from being promoted to repaired or preserve the repairedAt/pendingRepair values, respectively.
*/
static long getRepairedAt(RepairOption options, boolean force)
{
// we only want to set repairedAt for incremental repairs including all replicas for a token range. For non-global incremental repairs, full repairs, the UNREPAIRED_SSTABLE value will prevent
// sstables from being promoted to repaired or preserve the repairedAt/pendingRepair values, respectively. For forced repairs, repairedAt time is only set to UNREPAIRED_SSTABLE if we actually
// end up skipping replicas
if (options.isIncremental() && options.isGlobal() && ! force)
{
return System.currentTimeMillis();
}
else
{
return ActiveRepairService.UNREPAIRED_SSTABLE;
}
}
public static boolean verifyCompactionsPendingThreshold(UUID parentRepairSession, PreviewKind previewKind)
{
// Snapshot values so failure message is consistent with decision
int pendingCompactions = CompactionManager.instance.getPendingTasks();
int pendingThreshold = ActiveRepairService.instance.getRepairPendingCompactionRejectThreshold();
if (pendingCompactions > pendingThreshold)
{
logger.error("[{}] Rejecting incoming repair, pending compactions ({}) above threshold ({})",
previewKind.logPrefix(parentRepairSession), pendingCompactions, pendingThreshold);
return false;
}
return true;
}
public UUID prepareForRepair(UUID parentRepairSession, InetAddressAndPort coordinator, Set endpoints, RepairOption options, boolean isForcedRepair, List columnFamilyStores)
{
if (!verifyCompactionsPendingThreshold(parentRepairSession, options.getPreviewKind()))
failRepair(parentRepairSession, "Rejecting incoming repair, pending compactions above threshold"); // failRepair throws exception
long repairedAt = getRepairedAt(options, isForcedRepair);
registerParentRepairSession(parentRepairSession, coordinator, columnFamilyStores, options.getRanges(), options.isIncremental(), repairedAt, options.isGlobal(), options.getPreviewKind());
final CountDownLatch prepareLatch = new CountDownLatch(endpoints.size());
final AtomicBoolean status = new AtomicBoolean(true);
final Set failedNodes = Collections.synchronizedSet(new HashSet());
RequestCallback callback = new RequestCallback()
{
@Override
public void onResponse(Message msg)
{
prepareLatch.countDown();
}
@Override
public void onFailure(InetAddressAndPort from, RequestFailureReason failureReason)
{
status.set(false);
failedNodes.add(from.toString());
prepareLatch.countDown();
}
@Override
public boolean invokeOnFailure()
{
return true;
}
};
List tableIds = new ArrayList<>(columnFamilyStores.size());
for (ColumnFamilyStore cfs : columnFamilyStores)
tableIds.add(cfs.metadata.id);
for (InetAddressAndPort neighbour : endpoints)
{
if (FailureDetector.instance.isAlive(neighbour))
{
PrepareMessage message = new PrepareMessage(parentRepairSession, tableIds, options.getRanges(), options.isIncremental(), repairedAt, options.isGlobal(), options.getPreviewKind());
Message msg = Message.out(PREPARE_MSG, message);
MessagingService.instance().sendWithCallback(msg, neighbour, callback);
}
else
{
// we pre-filter the endpoints we want to repair for forced incremental repairs. So if any of the
// remaining ones go down, we still want to fail so we don't create repair sessions that can't complete
if (isForcedRepair && !options.isIncremental())
{
prepareLatch.countDown();
}
else
{
// bailout early to avoid potentially waiting for a long time.
failRepair(parentRepairSession, "Endpoint not alive: " + neighbour);
}
}
}
try
{
if (!prepareLatch.await(DatabaseDescriptor.getRpcTimeout(TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS))
failRepair(parentRepairSession, "Did not get replies from all endpoints.");
}
catch (InterruptedException e)
{
failRepair(parentRepairSession, "Interrupted while waiting for prepare repair response.");
}
if (!status.get())
{
failRepair(parentRepairSession, "Got negative replies from endpoints " + failedNodes);
}
return parentRepairSession;
}
/**
* Send Verb.CLEANUP_MSG to the given endpoints. This results in removing parent session object from the
* endpoint's cache.
* This method does not throw an exception in case of a messaging failure.
*/
public void cleanUp(UUID parentRepairSession, Set endpoints)
{
for (InetAddressAndPort endpoint : endpoints)
{
try
{
if (FailureDetector.instance.isAlive(endpoint))
{
CleanupMessage message = new CleanupMessage(parentRepairSession);
Message msg = Message.out(Verb.CLEANUP_MSG, message);
RequestCallback loggingCallback = new RequestCallback()
{
@Override
public void onResponse(Message msg)
{
logger.trace("Successfully cleaned up {} parent repair session on {}.", parentRepairSession, endpoint);
}
@Override
public void onFailure(InetAddressAndPort from, RequestFailureReason failureReason)
{
logger.debug("Failed to clean up parent repair session {} on {}. The uncleaned sessions will " +
"be removed on a node restart. This should not be a problem unless you see thousands " +
"of messages like this.", parentRepairSession, endpoint);
}
};
MessagingService.instance().sendWithCallback(msg, endpoint, loggingCallback);
}
}
catch (Exception exc)
{
logger.warn("Failed to send a clean up message to {}", endpoint, exc);
}
}
}
private void failRepair(UUID parentRepairSession, String errorMsg) {
removeParentRepairSession(parentRepairSession);
throw new RuntimeException(errorMsg);
}
public synchronized void registerParentRepairSession(UUID parentRepairSession, InetAddressAndPort coordinator, List columnFamilyStores, Collection> ranges, boolean isIncremental, long repairedAt, boolean isGlobal, PreviewKind previewKind)
{
assert isIncremental || repairedAt == ActiveRepairService.UNREPAIRED_SSTABLE;
if (!registeredForEndpointChanges)
{
Gossiper.instance.register(this);
FailureDetector.instance.registerFailureDetectionEventListener(this);
registeredForEndpointChanges = true;
}
if (!parentRepairSessions.containsKey(parentRepairSession))
{
parentRepairSessions.put(parentRepairSession, new ParentRepairSession(coordinator, columnFamilyStores, ranges, isIncremental, repairedAt, isGlobal, previewKind));
}
}
public ParentRepairSession getParentRepairSession(UUID parentSessionId)
{
ParentRepairSession session = parentRepairSessions.get(parentSessionId);
// this can happen if a node thinks that the coordinator was down, but that coordinator got back before noticing
// that it was down itself.
if (session == null)
throw new RuntimeException("Parent repair session with id = " + parentSessionId + " has failed.");
return session;
}
/**
* called when the repair session is done - either failed or anticompaction has completed
*
* clears out any snapshots created by this repair
*
* @param parentSessionId
* @return
*/
public synchronized ParentRepairSession removeParentRepairSession(UUID parentSessionId)
{
String snapshotName = parentSessionId.toString();
ParentRepairSession session = parentRepairSessions.remove(parentSessionId);
if (session == null)
return null;
for (ColumnFamilyStore cfs : session.columnFamilyStores.values())
{
if (cfs.snapshotExists(snapshotName))
cfs.clearSnapshot(snapshotName);
}
return session;
}
public void handleMessage(Message message)
{
RepairJobDesc desc = message.payload.desc;
RepairSession session = sessions.get(desc.sessionId);
if (session == null)
return;
switch (message.verb())
{
case VALIDATION_RSP:
ValidationResponse validation = (ValidationResponse) message.payload;
session.validationComplete(desc, message.from(), validation.trees);
break;
case SYNC_RSP:
// one of replica is synced.
SyncResponse sync = (SyncResponse) message.payload;
session.syncComplete(desc, sync.nodes, sync.success, sync.summaries);
break;
default:
break;
}
}
/**
* We keep a ParentRepairSession around for the duration of the entire repair, for example, on a 256 token vnode rf=3 cluster
* we would have 768 RepairSession but only one ParentRepairSession. We use the PRS to avoid anticompacting the sstables
* 768 times, instead we take all repaired ranges at the end of the repair and anticompact once.
*/
public static class ParentRepairSession
{
private final Keyspace keyspace;
private final Map columnFamilyStores = new HashMap<>();
private final Collection> ranges;
public final boolean isIncremental;
public final boolean isGlobal;
public final long repairedAt;
public final InetAddressAndPort coordinator;
public final PreviewKind previewKind;
public ParentRepairSession(InetAddressAndPort coordinator, List columnFamilyStores, Collection> ranges, boolean isIncremental, long repairedAt, boolean isGlobal, PreviewKind previewKind)
{
this.coordinator = coordinator;
Set keyspaces = new HashSet<>();
for (ColumnFamilyStore cfs : columnFamilyStores)
{
keyspaces.add(cfs.keyspace);
this.columnFamilyStores.put(cfs.metadata.id, cfs);
}
Preconditions.checkArgument(keyspaces.size() == 1, "repair sessions cannot operate on multiple keyspaces");
this.keyspace = Iterables.getOnlyElement(keyspaces);
this.ranges = ranges;
this.repairedAt = repairedAt;
this.isIncremental = isIncremental;
this.isGlobal = isGlobal;
this.previewKind = previewKind;
}
public boolean isPreview()
{
return previewKind != PreviewKind.NONE;
}
public Collection getColumnFamilyStores()
{
return ImmutableSet.builder().addAll(columnFamilyStores.values()).build();
}
public Keyspace getKeyspace()
{
return keyspace;
}
public Set getTableIds()
{
return ImmutableSet.copyOf(transform(getColumnFamilyStores(), cfs -> cfs.metadata.id));
}
public Set> getRanges()
{
return ImmutableSet.copyOf(ranges);
}
@Override
public String toString()
{
return "ParentRepairSession{" +
"columnFamilyStores=" + columnFamilyStores +
", ranges=" + ranges +
", repairedAt=" + repairedAt +
'}';
}
}
/*
If the coordinator node dies we should remove the parent repair session from the other nodes.
This uses the same notifications as we get in RepairSession
*/
public void onJoin(InetAddressAndPort endpoint, EndpointState epState) {}
public void beforeChange(InetAddressAndPort endpoint, EndpointState currentState, ApplicationState newStateKey, VersionedValue newValue) {}
public void onChange(InetAddressAndPort endpoint, ApplicationState state, VersionedValue value) {}
public void onAlive(InetAddressAndPort endpoint, EndpointState state) {}
public void onDead(InetAddressAndPort endpoint, EndpointState state) {}
public void onRemove(InetAddressAndPort endpoint)
{
convict(endpoint, Double.MAX_VALUE);
}
public void onRestart(InetAddressAndPort endpoint, EndpointState state)
{
convict(endpoint, Double.MAX_VALUE);
}
/**
* Something has happened to a remote node - if that node is a coordinator, we mark the parent repair session id as failed.
*
* The fail marker is kept in the map for 24h to make sure that if the coordinator does not agree
* that the repair failed, we need to fail the entire repair session
*
* @param ep endpoint to be convicted
* @param phi the value of phi with with ep was convicted
*/
public void convict(InetAddressAndPort ep, double phi)
{
// We want a higher confidence in the failure detection than usual because failing a repair wrongly has a high cost.
if (phi < 2 * DatabaseDescriptor.getPhiConvictThreshold() || parentRepairSessions.isEmpty())
return;
abort((prs) -> prs.coordinator.equals(ep), "Removing {} in parent repair sessions");
}
public int getRepairPendingCompactionRejectThreshold()
{
return DatabaseDescriptor.getRepairPendingCompactionRejectThreshold();
}
public void setRepairPendingCompactionRejectThreshold(int value)
{
DatabaseDescriptor.setRepairPendingCompactionRejectThreshold(value);
}
/**
* Remove any parent repair sessions matching predicate
*/
public void abort(Predicate predicate, String message)
{
Set parentSessionsToRemove = new HashSet<>();
for (Map.Entry repairSessionEntry : parentRepairSessions.entrySet())
{
if (predicate.test(repairSessionEntry.getValue()))
parentSessionsToRemove.add(repairSessionEntry.getKey());
}
if (!parentSessionsToRemove.isEmpty())
{
logger.info(message, parentSessionsToRemove);
parentSessionsToRemove.forEach(this::removeParentRepairSession);
}
}
}