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HDFS-4906. HDFS Output streams should not accept writes after being closed. Contributed by Aaron T. Myers.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1494303 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Aaron Myers 2013-06-18 21:05:16 +00:00
parent 52fe4e6be9
commit 1c309f763b
7 changed files with 127 additions and 23 deletions
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19
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ChecksumFileSystem.java
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@ -19,6 +19,7 @@
package org.apache.hadoop.fs;
import java.io.*;
import java.nio.channels.ClosedChannelException;
import java.util.Arrays;
import org.apache.hadoop.classification.InterfaceAudience;
@ -368,6 +369,7 @@ private static class ChecksumFSOutputSummer extends FSOutputSummer {
private FSDataOutputStream datas;
private FSDataOutputStream sums;
private static final float CHKSUM_AS_FRACTION = 0.01f;
private boolean isClosed = false;
public ChecksumFSOutputSummer(ChecksumFileSystem fs,
Path file,
@ -391,9 +393,13 @@ public ChecksumFSOutputSummer(ChecksumFileSystem fs,
@Override
public void close() throws IOException {
flushBuffer();
sums.close();
datas.close();
try {
flushBuffer();
sums.close();
datas.close();
} finally {
isClosed = true;
}
}
@Override
@ -402,6 +408,13 @@ protected void writeChunk(byte[] b, int offset, int len, byte[] checksum)
datas.write(b, offset, len);
sums.write(checksum);
}
@Override
protected void checkClosed() throws IOException {
if (isClosed) {
throw new ClosedChannelException();
}
}
}
@Override

19
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ChecksumFs.java
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@ -20,6 +20,7 @@
import java.io.*;
import java.net.URISyntaxException;
import java.nio.channels.ClosedChannelException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
@ -325,6 +326,7 @@ private static class ChecksumFSOutputSummer extends FSOutputSummer {
private FSDataOutputStream datas;
private FSDataOutputStream sums;
private static final float CHKSUM_AS_FRACTION = 0.01f;
private boolean isClosed = false;
public ChecksumFSOutputSummer(final ChecksumFs fs, final Path file,
@ -356,9 +358,13 @@ public ChecksumFSOutputSummer(final ChecksumFs fs, final Path file,
@Override
public void close() throws IOException {
flushBuffer();
sums.close();
datas.close();
try {
flushBuffer();
sums.close();
datas.close();
} finally {
isClosed = true;
}
}
@Override
@ -367,6 +373,13 @@ protected void writeChunk(byte[] b, int offset, int len, byte[] checksum)
datas.write(b, offset, len);
sums.write(checksum);
}
@Override
protected void checkClosed() throws IOException {
if (isClosed) {
throw new ClosedChannelException();
}
}
}
@Override

14
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSOutputSummer.java
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@ -53,6 +53,15 @@ protected FSOutputSummer(Checksum sum, int maxChunkSize, int checksumSize) {
*/
protected abstract void writeChunk(byte[] b, int offset, int len, byte[] checksum)
throws IOException;
/**
* Check if the implementing OutputStream is closed and should no longer
* accept writes. Implementations should do nothing if this stream is not
* closed, and should throw an {@link IOException} if it is closed.
*
* @throws IOException if this stream is already closed.
*/
protected abstract void checkClosed() throws IOException;
/** Write one byte */
@Override
@ -84,7 +93,10 @@ public synchronized void write(int b) throws IOException {
*/
@Override
public synchronized void write(byte b[], int off, int len)
throws IOException {
throws IOException {
checkClosed();
if (off < 0 || len < 0 || off > b.length - len) {
throw new ArrayIndexOutOfBoundsException();
}

3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -582,6 +582,9 @@ Release 2.1.0-beta - UNRELEASED
HDFS-4845. FSNamesystem.deleteInternal should acquire write-lock before
changing the inode map. (Arpit Agarwal via szetszwo)
HDFS-4906. HDFS Output streams should not accept writes after being
closed. (atm)
BREAKDOWN OF HDFS-347 SUBTASKS AND RELATED JIRAS
HDFS-4353. Encapsulate connections to peers in Peer and PeerServer classes.

21
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java
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@ -30,6 +30,7 @@
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.BufferOverflowException;
import java.nio.channels.ClosedChannelException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
@ -1299,10 +1300,10 @@ static Socket createSocketForPipeline(final DatanodeInfo first,
return sock;
}
private void isClosed() throws IOException {
protected void checkClosed() throws IOException {
if (closed) {
IOException e = lastException;
throw e != null ? e : new IOException("DFSOutputStream is closed");
throw e != null ? e : new ClosedChannelException();
}
}
@ -1471,7 +1472,7 @@ private void waitAndQueueCurrentPacket() throws IOException {
break;
}
}
isClosed();
checkClosed();
queueCurrentPacket();
}
}
@ -1481,7 +1482,7 @@ private void waitAndQueueCurrentPacket() throws IOException {
protected synchronized void writeChunk(byte[] b, int offset, int len, byte[] checksum)
throws IOException {
dfsClient.checkOpen();
isClosed();
checkClosed();
int cklen = checksum.length;
int bytesPerChecksum = this.checksum.getBytesPerChecksum();
@ -1608,7 +1609,7 @@ public void hsync(EnumSet<SyncFlag> syncFlags) throws IOException {
private void flushOrSync(boolean isSync, EnumSet<SyncFlag> syncFlags)
throws IOException {
dfsClient.checkOpen();
isClosed();
checkClosed();
try {
long toWaitFor;
long lastBlockLength = -1L;
@ -1695,7 +1696,7 @@ private void flushOrSync(boolean isSync, EnumSet<SyncFlag> syncFlags)
// If we got an error here, it might be because some other thread called
// close before our hflush completed. In that case, we should throw an
// exception that the stream is closed.
isClosed();
checkClosed();
// If we aren't closed but failed to sync, we should expose that to the
// caller.
throw ioe;
@ -1740,7 +1741,7 @@ public synchronized int getNumCurrentReplicas() throws IOException {
*/
public synchronized int getCurrentBlockReplication() throws IOException {
dfsClient.checkOpen();
isClosed();
checkClosed();
if (streamer == null) {
return blockReplication; // no pipeline, return repl factor of file
}
@ -1759,7 +1760,7 @@ private void flushInternal() throws IOException {
long toWaitFor;
synchronized (this) {
dfsClient.checkOpen();
isClosed();
checkClosed();
//
// If there is data in the current buffer, send it across
//
@ -1776,7 +1777,7 @@ private void waitForAckedSeqno(long seqno) throws IOException {
}
synchronized (dataQueue) {
while (!closed) {
isClosed();
checkClosed();
if (lastAckedSeqno >= seqno) {
break;
}
@ -1788,7 +1789,7 @@ private void waitForAckedSeqno(long seqno) throws IOException {
}
}
}
isClosed();
checkClosed();
}
private synchronized void start() {

64
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestClose.java Normal file
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@ -0,0 +1,64 @@
/**
* 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.hadoop.hdfs;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.channels.ClosedChannelException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.Test;
public class TestClose {
@Test
public void testWriteAfterClose() throws IOException {
Configuration conf = new Configuration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.build();
try {
final byte[] data = "foo".getBytes();
FileSystem fs = FileSystem.get(conf);
OutputStream out = fs.create(new Path("/test"));
out.write(data);
out.close();
try {
// Should fail.
out.write(data);
fail("Should not have been able to write more data after file is closed.");
} catch (ClosedChannelException cce) {
// We got the correct exception. Ignoring.
}
// Should succeed. Double closes are OK.
out.close();
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}

10
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestMultiThreadedHflush.java
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@ -18,6 +18,7 @@
package org.apache.hadoop.hdfs;
import java.io.IOException;
import java.nio.channels.ClosedChannelException;
import java.util.ArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
@ -169,12 +170,9 @@ public void run() {
while (true) {
try {
stm.hflush();
} catch (IOException ioe) {
if (!ioe.toString().contains("DFSOutputStream is closed")) {
throw ioe;
} else {
return;
}
} catch (ClosedChannelException ioe) {
// Expected exception caught. Ignoring.
return;
}
}
} catch (Throwable t) {