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Posted to common-commits@hadoop.apache.org by tu...@apache.org on 2012/04/24 22:35:00 UTC

svn commit: r1329996 - in /hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common: ./ src/main/java/org/apache/hadoop/fs/ src/main/java/org/apache/hadoop/fs/ftp/ src/main/java/org/apache/hadoop/fs/kfs/ src/main/java/org/apache/hadoop/fs/s3...

Author: tucu
Date: Tue Apr 24 20:34:59 2012
New Revision: 1329996

URL: http://svn.apache.org/viewvc?rev=1329996&view=rev
Log:
Merge -r 1329993:1329994 from trunk to branch. FIXES: HADOOP-7549

Added:
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/META-INF/services/org.apache.hadoop.fs.FileSystem
      - copied unchanged from r1329994, hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/resources/META-INF/services/org.apache.hadoop.fs.FileSystem
Modified:
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/CHANGES.txt
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/kfs/KosmosFileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/S3FileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemCaching.java
    hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFilterFileSystem.java

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/CHANGES.txt
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/CHANGES.txt?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/CHANGES.txt (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/CHANGES.txt Tue Apr 24 20:34:59 2012
@@ -146,6 +146,8 @@ Release 2.0.0 - UNRELEASED
 
     HADOOP-8152. Expand public APIs for security library classes. (atm via eli)
 
+    HADOOP-7549. Use JDK ServiceLoader mechanism to find FileSystem implementations. (tucu)
+
   OPTIMIZATIONS
 
   BUG FIXES

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java Tue Apr 24 20:34:59 2012
@@ -32,6 +32,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
+import java.util.ServiceLoader;
 import java.util.Set;
 import java.util.Stack;
 import java.util.TreeSet;
@@ -184,6 +185,17 @@ public abstract class FileSystem extends
     statistics = getStatistics(name.getScheme(), getClass());    
   }
 
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   * This implementation throws an <code>UnsupportedOperationException</code>.
+   *
+   * @return the protocol scheme for the FileSystem.
+   */
+  public String getScheme() {
+    throw new UnsupportedOperationException("Not implemented by  the FileSystem implementation");
+  }
+
   /** Returns a URI whose scheme and authority identify this FileSystem.*/
   public abstract URI getUri();
   
@@ -2078,9 +2090,45 @@ public abstract class FileSystem extends
       ) throws IOException {
   }
 
+  // making it volatile to be able to do a double checked locking
+  private volatile static boolean FILE_SYSTEMS_LOADED = false;
+
+  private static final Map<String, Class<? extends FileSystem>>
+    SERVICE_FILE_SYSTEMS = new HashMap<String, Class<? extends FileSystem>>();
+
+  private static void loadFileSystems() {
+    synchronized (FileSystem.class) {
+      if (!FILE_SYSTEMS_LOADED) {
+        ServiceLoader<FileSystem> serviceLoader = ServiceLoader.load(FileSystem.class);
+        for (FileSystem fs : serviceLoader) {
+          SERVICE_FILE_SYSTEMS.put(fs.getScheme(), fs.getClass());
+        }
+        FILE_SYSTEMS_LOADED = true;
+      }
+    }
+  }
+
+  public static Class<? extends FileSystem> getFileSystemClass(String scheme,
+      Configuration conf) throws IOException {
+    if (!FILE_SYSTEMS_LOADED) {
+      loadFileSystems();
+    }
+    Class<? extends FileSystem> clazz = null;
+    if (conf != null) {
+      clazz = (Class<? extends FileSystem>) conf.getClass("fs." + scheme + ".impl", null);
+    }
+    if (clazz == null) {
+      clazz = SERVICE_FILE_SYSTEMS.get(scheme);
+    }
+    if (clazz == null) {
+      throw new IOException("No FileSystem for scheme: " + scheme);
+    }
+    return clazz;
+  }
+
   private static FileSystem createFileSystem(URI uri, Configuration conf
       ) throws IOException {
-    Class<?> clazz = conf.getClass("fs." + uri.getScheme() + ".impl", null);
+    Class<?> clazz = getFileSystemClass(uri.getScheme(), conf);
     if (clazz == null) {
       throw new IOException("No FileSystem for scheme: " + uri.getScheme());
     }

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java Tue Apr 24 20:34:59 2012
@@ -71,7 +71,18 @@ public class HarFileSystem extends Filte
    */
   public HarFileSystem() {
   }
-  
+
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>har</code>
+   */
+  @Override
+  public String getScheme() {
+    return "har";
+  }
+
   /**
    * Constructor to create a HarFileSystem with an
    * underlying filesystem.

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/LocalFileSystem.java Tue Apr 24 20:34:59 2012
@@ -39,7 +39,18 @@ public class LocalFileSystem extends Che
   public LocalFileSystem() {
     this(new RawLocalFileSystem());
   }
-  
+
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>file</code>
+   */
+  @Override
+  public String getScheme() {
+    return "file";
+  }
+
   public FileSystem getRaw() {
     return getRawFileSystem();
   }

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java Tue Apr 24 20:34:59 2012
@@ -59,6 +59,17 @@ public class FTPFileSystem extends FileS
 
   private URI uri;
 
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>ftp</code>
+   */
+  @Override
+  public String getScheme() {
+    return "ftp";
+  }
+
   @Override
   public void initialize(URI uri, Configuration conf) throws IOException { // get
     super.initialize(uri, conf);

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/kfs/KosmosFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/kfs/KosmosFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/kfs/KosmosFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/kfs/KosmosFileSystem.java Tue Apr 24 20:34:59 2012
@@ -57,6 +57,17 @@ public class KosmosFileSystem extends Fi
         this.kfsImpl = fsimpl;
     }
 
+    /**
+     * Return the protocol scheme for the FileSystem.
+     * <p/>
+     *
+     * @return <code>kfs</code>
+     */
+    @Override
+    public String getScheme() {
+      return "kfs";
+    }
+
     @Override
     public URI getUri() {
 	return uri;

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/S3FileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/S3FileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/S3FileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/S3FileSystem.java Tue Apr 24 20:34:59 2012
@@ -67,6 +67,17 @@ public class S3FileSystem extends FileSy
     this.store = store;
   }
 
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>s3</code>
+   */
+  @Override
+  public String getScheme() {
+    return "s3";
+  }
+
   @Override
   public URI getUri() {
     return uri;

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java Tue Apr 24 20:34:59 2012
@@ -251,7 +251,18 @@ public class NativeS3FileSystem extends 
   public NativeS3FileSystem(NativeFileSystemStore store) {
     this.store = store;
   }
-  
+
+  /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>s3n</code>
+   */
+  @Override
+  public String getScheme() {
+    return "s3n";
+  }
+
   @Override
   public void initialize(URI uri, Configuration conf) throws IOException {
     super.initialize(uri, conf);

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/viewfs/ViewFileSystem.java Tue Apr 24 20:34:59 2012
@@ -150,6 +150,17 @@ public class ViewFileSystem extends File
   }
 
   /**
+   * Return the protocol scheme for the FileSystem.
+   * <p/>
+   *
+   * @return <code>viewfs</code>
+   */
+  @Override
+  public String getScheme() {
+    return "viewfs";
+  }
+
+  /**
    * Called after a new FileSystem instance is constructed.
    * @param theUri a uri whose authority section names the host, port, etc. for
    *          this FileSystem

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/main/resources/core-default.xml Tue Apr 24 20:34:59 2012
@@ -353,25 +353,6 @@
 </property>
 
 <property>
-  <name>fs.file.impl</name>
-  <value>org.apache.hadoop.fs.LocalFileSystem</value>
-  <description>The FileSystem for file: uris.</description>
-</property>
-
-<property>
-  <name>fs.hdfs.impl</name>
-  <value>org.apache.hadoop.hdfs.DistributedFileSystem</value>
-  <description>The FileSystem for hdfs: uris.</description>
-</property>
-
-<property>
-  <name>fs.viewfs.impl</name>
-  <value>org.apache.hadoop.fs.viewfs.ViewFileSystem</value>
-  <description>The FileSystem for view file system for viewfs: uris
-  (ie client side mount table:).</description>
-</property>
-
-<property>
   <name>fs.AbstractFileSystem.file.impl</name>
   <value>org.apache.hadoop.fs.local.LocalFs</value>
   <description>The AbstractFileSystem for file: uris.</description>
@@ -392,45 +373,6 @@
 </property>
 
 <property>
-  <name>fs.s3.impl</name>
-  <value>org.apache.hadoop.fs.s3.S3FileSystem</value>
-  <description>The FileSystem for s3: uris.</description>
-</property>
-
-<property>
-  <name>fs.s3n.impl</name>
-  <value>org.apache.hadoop.fs.s3native.NativeS3FileSystem</value>
-  <description>The FileSystem for s3n: (Native S3) uris.</description>
-</property>
-
-<property>
-  <name>fs.kfs.impl</name>
-  <value>org.apache.hadoop.fs.kfs.KosmosFileSystem</value>
-  <description>The FileSystem for kfs: uris.</description>
-</property>
-
-<property>
-  <name>fs.hftp.impl</name>
-  <value>org.apache.hadoop.hdfs.HftpFileSystem</value>
-</property>
-
-<property>
-  <name>fs.hsftp.impl</name>
-  <value>org.apache.hadoop.hdfs.HsftpFileSystem</value>
-</property>
-
-<property>
-  <name>fs.webhdfs.impl</name>
-  <value>org.apache.hadoop.hdfs.web.WebHdfsFileSystem</value>
-</property>
-
-<property>
-  <name>fs.ftp.impl</name>
-  <value>org.apache.hadoop.fs.ftp.FTPFileSystem</value>
-  <description>The FileSystem for ftp: uris.</description>
-</property>
-
-<property>
   <name>fs.ftp.host</name>
   <value>0.0.0.0</value>
   <description>FTP filesystem connects to this server</description>
@@ -445,18 +387,6 @@
 </property>
 
 <property>
-  <name>fs.har.impl</name>
-  <value>org.apache.hadoop.fs.HarFileSystem</value>
-  <description>The filesystem for Hadoop archives. </description>
-</property>
-
-<property>
-  <name>fs.har.impl.disable.cache</name>
-  <value>true</value>
-  <description>Don't cache 'har' filesystem instances.</description>
-</property>
-
-<property>
   <name>fs.df.interval</name>
   <value>60000</value>
   <description>Disk usage statistics refresh interval in msec.</description>

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemCaching.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemCaching.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemCaching.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFileSystemCaching.java Tue Apr 24 20:34:59 2012
@@ -43,7 +43,7 @@ public class TestFileSystemCaching {
   @Test
   public void testCacheEnabled() throws Exception {
     Configuration conf = new Configuration();
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     FileSystem fs1 = FileSystem.get(new URI("cachedfile://a"), conf);
     FileSystem fs2 = FileSystem.get(new URI("cachedfile://a"), conf);
     assertSame(fs1, fs2);
@@ -84,7 +84,7 @@ public class TestFileSystemCaching {
     // wait for InitializeForeverFileSystem to start initialization
     InitializeForeverFileSystem.sem.acquire();
     
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     FileSystem.get(new URI("cachedfile://a"), conf);
     t.interrupt();
     t.join();
@@ -93,7 +93,7 @@ public class TestFileSystemCaching {
   @Test
   public void testCacheDisabled() throws Exception {
     Configuration conf = new Configuration();
-    conf.set("fs.uncachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.uncachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     conf.setBoolean("fs.uncachedfile.impl.disable.cache", true);
     FileSystem fs1 = FileSystem.get(new URI("uncachedfile://a"), conf);
     FileSystem fs2 = FileSystem.get(new URI("uncachedfile://a"), conf);
@@ -104,7 +104,7 @@ public class TestFileSystemCaching {
   @Test
   public <T extends TokenIdentifier> void testCacheForUgi() throws Exception {
     final Configuration conf = new Configuration();
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     UserGroupInformation ugiA = UserGroupInformation.createRemoteUser("foo");
     UserGroupInformation ugiB = UserGroupInformation.createRemoteUser("bar");
     FileSystem fsA = ugiA.doAs(new PrivilegedExceptionAction<FileSystem>() {
@@ -156,7 +156,7 @@ public class TestFileSystemCaching {
   @Test
   public void testUserFS() throws Exception {
     final Configuration conf = new Configuration();
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     FileSystem fsU1 = FileSystem.get(new URI("cachedfile://a"), conf, "bar");
     FileSystem fsU2 = FileSystem.get(new URI("cachedfile://a"), conf, "foo");
     
@@ -166,7 +166,7 @@ public class TestFileSystemCaching {
   @Test
   public void testFsUniqueness() throws Exception {
     final Configuration conf = new Configuration();
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     // multiple invocations of FileSystem.get return the same object.
     FileSystem fs1 = FileSystem.get(conf);
     FileSystem fs2 = FileSystem.get(conf);
@@ -183,7 +183,7 @@ public class TestFileSystemCaching {
   @Test
   public void testCloseAllForUGI() throws Exception {
     final Configuration conf = new Configuration();
-    conf.set("fs.cachedfile.impl", conf.get("fs.file.impl"));
+    conf.set("fs.cachedfile.impl", FileSystem.getFileSystemClass("file", null).getName());
     UserGroupInformation ugiA = UserGroupInformation.createRemoteUser("foo");
     FileSystem fsA = ugiA.doAs(new PrivilegedExceptionAction<FileSystem>() {
       public FileSystem run() throws Exception {

Modified: hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFilterFileSystem.java
URL: http://svn.apache.org/viewvc/hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFilterFileSystem.java?rev=1329996&r1=1329995&r2=1329996&view=diff
==============================================================================
--- hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFilterFileSystem.java (original)
+++ hadoop/common/branches/branch-2/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestFilterFileSystem.java Tue Apr 24 20:34:59 2012
@@ -165,7 +165,10 @@ public class TestFilterFileSystem {
     public Token<?> getDelegationToken(String renewer) throws IOException {
       return null;
     }
-    
+
+    public String getScheme() {
+      return "dontcheck";
+    }
   }
   
   @Test