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https://issues.apache.org/jira/browse/HADOOP-9079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657241#comment-13657241
 ] 

Ted Yu commented on HADOOP-9079:
--------------------------------

I made modification in TestLocalDirAllocator#testRWBufferDirBecomesRO:
{code}
Index: 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
===================================================================
--- 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
   (revision 1482467)
+++ 
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestLocalDirAllocator.java
   (working copy)
@@ -215,7 +215,9 @@
       validateTempDirCreation(buildBufferDir(ROOT, nextDirIdx));

       // change buffer directory 2 to be read only
-      new File(new Path(dir4).toUri().getPath()).setReadOnly();
+      File f0 = new File(new Path(dir4).toUri().getPath());
+      f0.setReadable(false);
+      f0.setExecutable(false);
       validateTempDirCreation(dir3);
       validateTempDirCreation(dir3);
     } finally {
{code}
When I ran the test, I got:
{code}
initializationError(org.apache.hadoop.fs.TestLocalDirAllocator)  Time elapsed: 
5 sec  <<< FAILURE!
java.lang.AssertionError:
  at org.junit.Assert.fail(Assert.java:91)
  at org.junit.Assert.assertTrue(Assert.java:43)
  at org.junit.Assert.assertTrue(Assert.java:54)
  at 
org.apache.hadoop.fs.TestLocalDirAllocator.rmBufferDirs(TestLocalDirAllocator.java:104)
  at 
org.apache.hadoop.fs.TestLocalDirAllocator.<clinit>(TestLocalDirAllocator.java:71)
{code}
                
> LocalDirAllocator throws ArithmeticException
> --------------------------------------------
>
>                 Key: HADOOP-9079
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9079
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.0.3-alpha
>            Reporter: Jimmy Xiang
>            Priority: Minor
>         Attachments: hadoop-9079-v2.txt, trunk-9079.patch
>
>
> 2012-11-19 22:07:41,709 WARN  [IPC Server handler 0 on 38671] 
> nodemanager.NMAuditLogger(150): USER=UnknownUser        IP=**** 
> OPERATION=Stop Container Request        TARGET=ContainerManagerImpl     
> RESULT=FAILURE  DESCRIPTION=Trying to stop unknown container!   
> APPID=application_1353391620476_0001    
> CONTAINERID=container_1353391620476_0001_01_000010
> java.lang.ArithmeticException: / by zero
>       at 
> org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:368)
>       at 
> org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
>       at 
> org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)
>       at 
> org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:115)
>       at 
> org.apache.hadoop.yarn.server.nodemanager.LocalDirsHandlerService.getLocalPathForWrite(LocalDirsHandlerService.java:263)
>       at 
> org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService$LocalizerRunner.run(ResourceLocalizationService.java:849)

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