diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java index 2a9208ea5b..9c212a4a59 100644 --- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java +++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java @@ -56,6 +56,12 @@ public FsUrlStreamHandlerFactory() { 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); } diff --git a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemInitialization.java b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemInitialization.java new file mode 100644 index 0000000000..d3fceecdfa --- /dev/null +++ b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemInitialization.java @@ -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); + } + } +}