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Date: Thu, 6 Jan 2011 18:08:45 -0500 (EST)
From: "Todd Lipcon (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Commented: (MAPREDUCE-2238) Undeletable build directories
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-2238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12978561#action_12978561 ] 

Todd Lipcon commented on MAPREDUCE-2238:
----------------------------------------

I think we should do the following:
- change out the implementation of setPermissions to not use the Java APIs, but rather the old style system("chmod") approach
- implement a proper chmod call in libhadoop (JNI) to avoid the fork for production systems where the fork is too expensive

bq. Sorry...there are lots of interesting failure modes in Hadoop, and my memory is finite

:) But that's why Hadoop's so much fun to work on! If it just worked all the time we'd be bored.

> Undeletable build directories 
> ------------------------------
>
>                 Key: MAPREDUCE-2238
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2238
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: build, test
>    Affects Versions: 0.23.0
>            Reporter: Eli Collins
>
> The MR hudson job is failing, looks like it's due to a test chmod'ing a build directory so the checkout can't clean the build dir.
> https://hudson.apache.org/hudson/job/Hadoop-Mapreduce-trunk/549/console
> Building remotely on hadoop7
> hudson.util.IOException2: remote file operation failed: /grid/0/hudson/hudson-slave/workspace/Hadoop-Mapreduce-trunk at hudson.remoting.Channel@2545938c:hadoop7
> 	at hudson.FilePath.act(FilePath.java:749)
> 	at hudson.FilePath.act(FilePath.java:735)
> 	at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:589)
> 	at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:537)
> 	at hudson.model.AbstractProject.checkout(AbstractProject.java:1116)
> 	at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
> 	at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
> 	at hudson.model.Run.run(Run.java:1324)
> 	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
> 	at hudson.model.ResourceController.execute(ResourceController.java:88)
> 	at hudson.model.Executor.run(Executor.java:139)
> Caused by: java.io.IOException: Unable to delete /grid/0/hudson/hudson-slave/workspace/Hadoop-Mapreduce-trunk/trunk/build/test/logs/userlogs/job_20101230131139886_0001/attempt_20101230131139886_0001_m_000000_0

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