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HADOOP-9041. FsUrlStreamHandlerFactory could cause an infinite loop in FileSystem initialization. (Yanbo Liang and Radim Kolar via llu) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1422430 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Luke Lu 2012-12-16 00:39:17 +00:00
parent db09dba7ae
commit 3689933b26
2 changed files with 52 additions and 0 deletions
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6
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java
View File

@ -56,6 +56,12 @@ public class FsUrlStreamHandlerFactory implements
public FsUrlStreamHandlerFactory(Configuration conf) {
this.conf = new Configuration(conf);
// force init of FileSystem code to avoid HADOOP-9041
try {
FileSystem.getFileSystemClass("file", conf);
} catch (IOException io) {
throw new RuntimeException(io);
}
this.handler = new FsUrlStreamHandler(this.conf);
}

46
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemInitialization.java Normal file
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@ -0,0 +1,46 @@
/**
* 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.fs;
import org.apache.hadoop.conf.Configuration;
import java.io.IOException;
import java.net.URL;
import org.junit.Test;
import static org.junit.Assert.*;
public class TestFileSystemInitialization {
/**
* Check if FileSystem can be properly initialized if URLStreamHandlerFactory
* is registered.
*/
@Test
public void testInitializationWithRegisteredStreamFactory() {
Configuration conf = new Configuration();
URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory(conf));
try {
FileSystem.getFileSystemClass("file", conf);
}
catch (IOException ok) {
// we might get an exception but this not related to infinite loop problem
assertFalse(false);
}
}
}