/**
* 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.tez.runtime.library.common.shuffle.impl;
import java.io.IOException;
import java.net.URI;
import java.util.BitSet;
import java.util.List;
import com.google.common.annotations.VisibleForTesting;
import com.google.protobuf.ByteString;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tez.common.TezCommonUtils;
import org.apache.tez.common.TezUtilsInternal;
import org.apache.tez.dag.api.TezUncheckedException;
import org.apache.tez.runtime.api.Event;
import org.apache.tez.runtime.api.InputContext;
import org.apache.tez.runtime.api.events.DataMovementEvent;
import org.apache.tez.runtime.api.events.InputFailedEvent;
import org.apache.tez.runtime.library.common.InputAttemptIdentifier;
import org.apache.tez.runtime.library.shuffle.common.ShuffleUtils;
import org.apache.tez.runtime.library.shuffle.impl.ShuffleUserPayloads.DataMovementEventPayloadProto;
import com.google.protobuf.InvalidProtocolBufferException;
public class ShuffleInputEventHandler {
private static final Log LOG = LogFactory.getLog(ShuffleInputEventHandler.class);
private final ShuffleScheduler scheduler;
private final InputContext inputContext;
private int maxMapRuntime = 0;
private final boolean sslShuffle;
public ShuffleInputEventHandler(InputContext inputContext,
ShuffleScheduler scheduler, boolean sslShuffle) {
this.inputContext = inputContext;
this.scheduler = scheduler;
this.sslShuffle = sslShuffle;
}
public void handleEvents(List<Event> events) throws IOException {
for (Event event : events) {
handleEvent(event);
}
}
private void handleEvent(Event event) throws IOException {
if (event instanceof DataMovementEvent) {
processDataMovementEvent((DataMovementEvent) event);
} else if (event instanceof InputFailedEvent) {
processTaskFailedEvent((InputFailedEvent) event);
}
}
private void processDataMovementEvent(DataMovementEvent dmEvent) throws IOException {
DataMovementEventPayloadProto shufflePayload;
try {
shufflePayload = DataMovementEventPayloadProto.parseFrom(ByteString.copyFrom(dmEvent.getUserPayload()));
} catch (InvalidProtocolBufferException e) {
throw new TezUncheckedException("Unable to parse DataMovementEvent payload", e);
}
int partitionId = dmEvent.getSourceIndex();
LOG.info("DataMovementEvent partitionId:" + partitionId + ", targetIndex: " + dmEvent.getTargetIndex()
+ ", attemptNum: " + dmEvent.getVersion() + ", payload: " + ShuffleUtils.stringify(shufflePayload));
// TODO NEWTEZ See if this duration hack can be removed.
int duration = shufflePayload.getRunDuration();
if (duration > maxMapRuntime) {
maxMapRuntime = duration;
scheduler.informMaxMapRunTime(maxMapRuntime);
}
if (shufflePayload.hasEmptyPartitions()) {
try {
byte[] emptyPartitions = TezCommonUtils.decompressByteStringToByteArray(shufflePayload.getEmptyPartitions());
BitSet emptyPartitionsBitSet = TezUtilsInternal.fromByteArray(emptyPartitions);
if (emptyPartitionsBitSet.get(partitionId)) {
InputAttemptIdentifier srcAttemptIdentifier =
new InputAttemptIdentifier(dmEvent.getTargetIndex(), dmEvent.getVersion());
LOG.info("Source partition: " + partitionId + " did not generate any data. SrcAttempt: ["
+ srcAttemptIdentifier + "]. Not fetching.");
scheduler.copySucceeded(srcAttemptIdentifier, null, 0, 0, 0, null);
return;
}
} catch (IOException e) {
throw new TezUncheckedException("Unable to set " +
"the empty partition to succeeded", e);
}
}
InputAttemptIdentifier srcAttemptIdentifier =
new InputAttemptIdentifier(dmEvent.getTargetIndex(), dmEvent.getVersion(),
shufflePayload.getPathComponent());
URI baseUri = getBaseURI(shufflePayload.getHost(), shufflePayload.getPort(), partitionId);
scheduler.addKnownMapOutput(shufflePayload.getHost(), shufflePayload.getPort(),
partitionId, baseUri.toString(), srcAttemptIdentifier);
}
private void processTaskFailedEvent(InputFailedEvent ifEvent) {
InputAttemptIdentifier taIdentifier = new InputAttemptIdentifier(ifEvent.getTargetIndex(), ifEvent.getVersion());
scheduler.obsoleteInput(taIdentifier);
LOG.info("Obsoleting output of src-task: " + taIdentifier);
}
// TODO NEWTEZ Handle encrypted shuffle
@VisibleForTesting
URI getBaseURI(String host, int port, int partitionId) {
StringBuilder sb = ShuffleUtils.constructBaseURIForShuffleHandler(host, port,
partitionId, inputContext.getApplicationId().toString(), sslShuffle);
URI u = URI.create(sb.toString());
return u;
}
}