| /** |
| * 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.pig.backend.hadoop.executionengine.tez.runtime; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.JobStatus.State; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.RecordWriter; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputCommitter; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POStore; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.util.UDFContext; |
| |
| public class PigOutputFormatTez extends PigOutputFormat { |
| |
| |
| @Override |
| public RecordWriter<WritableComparable, Tuple> getRecordWriter( |
| TaskAttemptContext taskattemptcontext) throws IOException, |
| InterruptedException { |
| resetUDFContextForThreadReuse(); |
| return super.getRecordWriter(taskattemptcontext); |
| } |
| |
| @Override |
| public OutputCommitter getOutputCommitter( |
| TaskAttemptContext taskattemptcontext) throws IOException, |
| InterruptedException { |
| resetUDFContextForThreadReuse(); |
| setupUdfEnvAndStores(taskattemptcontext); |
| |
| // we return an instance of PigOutputCommitterTez (PIG-4202) to Hadoop - this instance |
| // will wrap the real OutputCommitter(s) belonging to the store(s) |
| return new PigOutputCommitterTez(taskattemptcontext, |
| mapStores, |
| reduceStores); |
| } |
| |
| public static void resetUDFContextForThreadReuse() { |
| // On the Tez AM, MROutput OutputCommitters are initialized and setupJob |
| // called on them in a loop in the same thread. |
| // commitJob/abortJob can be called from any thread based on events received from vertices |
| |
| // On the Tez tasks, it initializes different inputs/outputs in different Initializer threads |
| // by submitting them to a thread pool. Even though threadpoolsize=numInputs+numOutputs |
| // a thread can be reused. |
| |
| // Since deserialized UDFContext from input and output payload contains |
| // information only for that input or output reduce payload sizes, we need to |
| // ensure it is deserialized everytime before use in a thread to get the right one. |
| UDFContext.getUDFContext().reset(); |
| } |
| |
| public static class PigOutputCommitterTez extends PigOutputCommitter { |
| |
| public PigOutputCommitterTez(TaskAttemptContext context, |
| List<POStore> mapStores, List<POStore> reduceStores) |
| throws IOException { |
| super(context, mapStores, reduceStores); |
| } |
| |
| @Override |
| public void setupJob(JobContext context) throws IOException { |
| resetUDFContextForThreadReuse(); |
| try { |
| super.setupJob(context); |
| } finally { |
| resetUDFContextForThreadReuse(); |
| } |
| |
| } |
| |
| @Override |
| public void commitJob(JobContext context) throws IOException { |
| resetUDFContextForThreadReuse(); |
| try { |
| super.commitJob(context); |
| } finally { |
| resetUDFContextForThreadReuse(); |
| } |
| } |
| |
| @Override |
| public void abortJob(JobContext context, State state) |
| throws IOException { |
| resetUDFContextForThreadReuse(); |
| try { |
| super.abortJob(context, state); |
| } finally { |
| resetUDFContextForThreadReuse(); |
| } |
| } |
| |
| } |
| } |