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From jl...@apache.org
Subject hadoop git commit: HADOOP-12958. PhantomReference for filesystem statistics can trigger OOM. Contributed by Sangjin Lee
Date Fri, 25 Mar 2016 22:58:38 GMT
Repository: hadoop
Updated Branches:
  refs/heads/trunk 00bebb7e5 -> 9a09200a1


HADOOP-12958. PhantomReference for filesystem statistics can trigger OOM. Contributed by Sangjin
Lee


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/9a09200a
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/9a09200a
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/9a09200a

Branch: refs/heads/trunk
Commit: 9a09200a1f5f752e266d4fb8e0c808073080bde8
Parents: 00bebb7
Author: Jason Lowe <jlowe@apache.org>
Authored: Fri Mar 25 22:56:49 2016 +0000
Committer: Jason Lowe <jlowe@apache.org>
Committed: Fri Mar 25 22:58:04 2016 +0000

----------------------------------------------------------------------
 .../src/main/java/org/apache/hadoop/fs/FileSystem.java       | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/9a09200a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
index a8a5c6d..e0ea7ac 100644
--- a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
+++ b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
@@ -20,7 +20,7 @@ package org.apache.hadoop.fs;
 import java.io.Closeable;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.lang.ref.PhantomReference;
+import java.lang.ref.WeakReference;
 import java.lang.ref.ReferenceQueue;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -3133,7 +3133,7 @@ public abstract class FileSystem extends Configured implements Closeable
{
 
     /**
      * Set of all thread-local data areas.  Protected by the Statistics lock.
-     * The references to the statistics data are kept using phantom references
+     * The references to the statistics data are kept using weak references
      * to the associated threads. Proper clean-up is performed by the cleaner
      * thread when the threads are garbage collected.
      */
@@ -3186,11 +3186,11 @@ public abstract class FileSystem extends Configured implements Closeable
{
     }
 
     /**
-     * A phantom reference to a thread that also includes the data associated
+     * A weak reference to a thread that also includes the data associated
      * with that thread. On the thread being garbage collected, it is enqueued
      * to the reference queue for clean-up.
      */
-    private class StatisticsDataReference extends PhantomReference<Thread> {
+    private class StatisticsDataReference extends WeakReference<Thread> {
       private final StatisticsData data;
 
       public StatisticsDataReference(StatisticsData data, Thread thread) {


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