HADOOP-18383. Codecs with @DoNotPool annotation are not closed causing memory leak (#4739)
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.io.compress;
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import java.io.IOException;
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/**
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* An exception class for when a closed compressor/decopressor is being used.
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* {@link org.apache.hadoop.io.compress.Compressor}
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* {@link org.apache.hadoop.io.compress.Decompressor}
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*/
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public class AlreadyClosedException extends IOException {
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public AlreadyClosedException(String message) {
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super(message);
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}
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}
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@ -205,6 +205,7 @@ public class CodecPool {
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}
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// if the compressor can't be reused, don't pool it.
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if (compressor.getClass().isAnnotationPresent(DoNotPool.class)) {
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compressor.end();
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return;
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}
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compressor.reset();
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@ -225,6 +226,7 @@ public class CodecPool {
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}
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// if the decompressor can't be reused, don't pool it.
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if (decompressor.getClass().isAnnotationPresent(DoNotPool.class)) {
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decompressor.end();
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return;
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}
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decompressor.reset();
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@ -23,6 +23,7 @@ import java.util.zip.Checksum;
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import java.util.zip.DataFormatException;
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import java.util.zip.Inflater;
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import org.apache.hadoop.io.compress.AlreadyClosedException;
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import org.apache.hadoop.io.compress.Decompressor;
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import org.apache.hadoop.io.compress.DoNotPool;
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import org.apache.hadoop.util.DataChecksum;
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@ -105,7 +106,11 @@ public class BuiltInGzipDecompressor implements Decompressor {
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* Immediately after the trailer (and potentially prior to the next gzip
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* member/substream header), without reset() having been called.
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*/
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FINISHED;
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FINISHED,
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/**
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* Immediately after end() has been called.
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*/
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ENDED;
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}
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/**
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@ -182,6 +187,10 @@ public class BuiltInGzipDecompressor implements Decompressor {
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throws IOException {
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int numAvailBytes = 0;
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if (state == GzipStateLabel.ENDED) {
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throw new AlreadyClosedException("decompress called on closed decompressor");
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}
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if (state != GzipStateLabel.DEFLATE_STREAM) {
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executeHeaderState();
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@ -472,6 +481,8 @@ public class BuiltInGzipDecompressor implements Decompressor {
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@Override
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public synchronized void end() {
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inflater.end();
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state = GzipStateLabel.ENDED;
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}
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/**
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@ -19,6 +19,10 @@ package org.apache.hadoop.io.compress;
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import static org.junit.Assert.assertEquals;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.OutputStream;
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import java.util.Random;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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@ -26,6 +30,8 @@ import java.util.concurrent.LinkedBlockingDeque;
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import java.util.concurrent.TimeUnit;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.io.compress.zlib.BuiltInGzipDecompressor;
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import org.apache.hadoop.test.LambdaTestUtils;
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import org.junit.Before;
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import org.junit.Test;
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@ -189,4 +195,36 @@ public class TestCodecPool {
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CodecPool.returnDecompressor(decompressor);
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}
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}
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@Test(timeout = 10000)
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public void testDoNotPoolDecompressorNotUseableAfterReturn() throws Exception {
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final GzipCodec gzipCodec = new GzipCodec();
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gzipCodec.setConf(new Configuration());
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final Random random = new Random();
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final byte[] bytes = new byte[1024];
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random.nextBytes(bytes);
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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try (OutputStream outputStream = gzipCodec.createOutputStream(baos)) {
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outputStream.write(bytes);
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}
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final byte[] gzipBytes = baos.toByteArray();
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final ByteArrayInputStream bais = new ByteArrayInputStream(gzipBytes);
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// BuiltInGzipDecompressor is an explicit example of a Decompressor
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// with the @DoNotPool annotation
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final Decompressor decompressor = new BuiltInGzipDecompressor();
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CodecPool.returnDecompressor(decompressor);
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final CompressionInputStream inputStream = gzipCodec.createInputStream(bais, decompressor);
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LambdaTestUtils.intercept(
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AlreadyClosedException.class,
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"decompress called on closed decompressor",
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"Decompressor from Codec with @DoNotPool should not be " +
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"useable after returning to CodecPool",
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() -> inputStream.read());
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}
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}
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