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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.repair;
import java.net.InetAddress;
import java.util.*;
import com.google.common.base.Predicate;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.MoreExecutors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.compaction.CompactionManager;
import org.apache.cassandra.dht.Bounds;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.apache.cassandra.net.IVerbHandler;
import org.apache.cassandra.net.MessageIn;
import org.apache.cassandra.net.MessageOut;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.repair.messages.*;
import org.apache.cassandra.service.ActiveRepairService;
/**
* Handles all repair related message.
*
* @since 2.0
*/
public class RepairMessageVerbHandler implements IVerbHandler
{
private static final Logger logger = LoggerFactory.getLogger(RepairMessageVerbHandler.class);
public void doVerb(final MessageIn message, final int id)
{
// TODO add cancel/interrupt message
RepairJobDesc desc = message.payload.desc;
try
{
switch (message.payload.messageType)
{
case PREPARE_MESSAGE:
PrepareMessage prepareMessage = (PrepareMessage) message.payload;
logger.debug("Preparing, {}", prepareMessage);
List columnFamilyStores = new ArrayList<>(prepareMessage.cfIds.size());
for (UUID cfId : prepareMessage.cfIds)
{
ColumnFamilyStore columnFamilyStore = ColumnFamilyStore.getIfExists(cfId);
if (columnFamilyStore == null)
{
logErrorAndSendFailureResponse(String.format("Table with id %s was dropped during prepare phase of repair",
cfId.toString()), message.from, id);
return;
}
columnFamilyStores.add(columnFamilyStore);
}
ActiveRepairService.instance.registerParentRepairSession(prepareMessage.parentRepairSession,
message.from,
columnFamilyStores,
prepareMessage.ranges,
prepareMessage.isIncremental,
prepareMessage.timestamp,
prepareMessage.isGlobal);
MessagingService.instance().sendReply(new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE), id, message.from);
break;
case SNAPSHOT:
logger.debug("Snapshotting {}", desc);
final ColumnFamilyStore cfs = ColumnFamilyStore.getIfExists(desc.keyspace, desc.columnFamily);
if (cfs == null)
{
logErrorAndSendFailureResponse(String.format("Table %s.%s was dropped during snapshot phase of repair",
desc.keyspace, desc.columnFamily), message.from, id);
return;
}
ActiveRepairService.ParentRepairSession prs = ActiveRepairService.instance.getParentRepairSession(desc.parentSessionId);
if (prs.isGlobal)
{
prs.maybeSnapshot(cfs.metadata.cfId, desc.parentSessionId);
}
else
{
cfs.snapshot(desc.sessionId.toString(), new Predicate()
{
public boolean apply(SSTableReader sstable)
{
return sstable != null &&
!sstable.metadata.isIndex() && // exclude SSTables from 2i
new Bounds<>(sstable.first.getToken(), sstable.last.getToken()).intersects(desc.ranges);
}
}, true, false); //ephemeral snapshot, if repair fails, it will be cleaned next startup
}
logger.debug("Enqueuing response to snapshot request {} to {}", desc.sessionId, message.from);
MessagingService.instance().sendReply(new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE), id, message.from);
break;
case VALIDATION_REQUEST:
ValidationRequest validationRequest = (ValidationRequest) message.payload;
logger.debug("Validating {}", validationRequest);
// trigger read-only compaction
ColumnFamilyStore store = ColumnFamilyStore.getIfExists(desc.keyspace, desc.columnFamily);
if (store == null)
{
logger.error("Table {}.{} was dropped during snapshot phase of repair", desc.keyspace, desc.columnFamily);
MessagingService.instance().sendOneWay(new ValidationComplete(desc).createMessage(), message.from);
return;
}
Validator validator = new Validator(desc, message.from, validationRequest.gcBefore);
CompactionManager.instance.submitValidation(store, validator);
break;
case SYNC_REQUEST:
// forwarded sync request
SyncRequest request = (SyncRequest) message.payload;
logger.debug("Syncing {}", request);
long repairedAt = ActiveRepairService.UNREPAIRED_SSTABLE;
if (desc.parentSessionId != null && ActiveRepairService.instance.getParentRepairSession(desc.parentSessionId) != null)
repairedAt = ActiveRepairService.instance.getParentRepairSession(desc.parentSessionId).getRepairedAt();
StreamingRepairTask task = new StreamingRepairTask(desc, request, repairedAt);
task.run();
break;
case ANTICOMPACTION_REQUEST:
AnticompactionRequest anticompactionRequest = (AnticompactionRequest) message.payload;
logger.debug("Got anticompaction request {}", anticompactionRequest);
ListenableFuture compactionDone = ActiveRepairService.instance.doAntiCompaction(anticompactionRequest.parentRepairSession, anticompactionRequest.successfulRanges);
compactionDone.addListener(new Runnable()
{
@Override
public void run()
{
MessagingService.instance().sendReply(new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE), id, message.from);
}
}, MoreExecutors.directExecutor());
break;
case CLEANUP:
logger.debug("cleaning up repair");
CleanupMessage cleanup = (CleanupMessage) message.payload;
ActiveRepairService.instance.removeParentRepairSession(cleanup.parentRepairSession);
MessagingService.instance().sendReply(new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE), id, message.from);
break;
default:
ActiveRepairService.instance.handleMessage(message.from, message.payload);
break;
}
}
catch (Exception e)
{
logger.error("Got error, removing parent repair session");
if (desc != null && desc.parentSessionId != null)
ActiveRepairService.instance.removeParentRepairSession(desc.parentSessionId);
throw new RuntimeException(e);
}
}
private void logErrorAndSendFailureResponse(String errorMessage, InetAddress to, int id)
{
logger.error(errorMessage);
MessageOut reply = new MessageOut(MessagingService.Verb.INTERNAL_RESPONSE)
.withParameter(MessagingService.FAILURE_RESPONSE_PARAM, MessagingService.ONE_BYTE);
MessagingService.instance().sendReply(reply, id, to);
}
}
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