org.apache.cassandra.repair.SyncTask Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of cassandra-all Show documentation
Show all versions of cassandra-all Show documentation
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.repair;
import java.util.List;
import java.util.concurrent.TimeUnit;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
import org.apache.cassandra.utils.concurrent.AsyncFuture;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.dht.Range;
import org.apache.cassandra.dht.Token;
import org.apache.cassandra.locator.InetAddressAndPort;
import org.apache.cassandra.repair.messages.RepairMessage;
import org.apache.cassandra.repair.messages.SyncRequest;
import org.apache.cassandra.streaming.PreviewKind;
import org.apache.cassandra.tracing.Tracing;
import static org.apache.cassandra.net.Verb.SYNC_REQ;
import static org.apache.cassandra.repair.messages.RepairMessage.notDone;
public abstract class SyncTask extends AsyncFuture implements Runnable
{
private static final Logger logger = LoggerFactory.getLogger(SyncTask.class);
protected final SharedContext ctx;
protected final RepairJobDesc desc;
@VisibleForTesting
public final List> rangesToSync;
protected final PreviewKind previewKind;
protected final SyncNodePair nodePair;
protected volatile long startTime = Long.MIN_VALUE;
protected final SyncStat stat;
protected SyncTask(SharedContext ctx, RepairJobDesc desc, InetAddressAndPort primaryEndpoint, InetAddressAndPort peer, List> rangesToSync, PreviewKind previewKind)
{
Preconditions.checkArgument(!peer.equals(primaryEndpoint), "Sending and receiving node are the same: %s", peer);
this.ctx = ctx;
this.desc = desc;
this.rangesToSync = rangesToSync;
this.nodePair = new SyncNodePair(primaryEndpoint, peer);
this.previewKind = previewKind;
this.stat = new SyncStat(nodePair, rangesToSync);
}
protected abstract void startSync();
public SyncNodePair nodePair()
{
return nodePair;
}
/**
* Compares trees, and triggers repairs for any ranges that mismatch.
*/
public final void run()
{
startTime = ctx.clock().currentTimeMillis();
// choose a repair method based on the significance of the difference
String format = String.format("%s Endpoints %s and %s %%s for %s", previewKind.logPrefix(desc.sessionId), nodePair.coordinator, nodePair.peer, desc.columnFamily);
if (rangesToSync.isEmpty())
{
logger.info(String.format(format, "are consistent"));
Tracing.traceRepair("Endpoint {} is consistent with {} for {}", nodePair.coordinator, nodePair.peer, desc.columnFamily);
trySuccess(stat);
return;
}
// non-0 difference: perform streaming repair
logger.info(String.format(format, "have " + rangesToSync.size() + " range(s) out of sync"));
Tracing.traceRepair("Endpoint {} has {} range(s) out of sync with {} for {}", nodePair.coordinator, rangesToSync.size(), nodePair.peer, desc.columnFamily);
startSync();
}
public boolean isLocal()
{
return false;
}
protected void finished()
{
if (startTime != Long.MIN_VALUE)
Keyspace.open(desc.keyspace).getColumnFamilyStore(desc.columnFamily).metric.repairSyncTime.update(ctx.clock().currentTimeMillis() - startTime, TimeUnit.MILLISECONDS);
}
public void abort(Throwable reason)
{
tryFailure(reason);
}
void sendRequest(SyncRequest request, InetAddressAndPort to)
{
RepairMessage.sendMessageWithFailureCB(ctx, notDone(this), request,
SYNC_REQ,
to,
this::tryFailure);
}
}