[jira] Commented: (HADOOP-3070) Trash not being expunged, Trash Emptier thread gone by NPE

["Owen O'Malley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-3070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581243#action_12581243 ] 

Owen O'Malley commented on HADOOP-3070:
---------------------------------------

+1 for 16.2

I would also add a catch at the outer level of the run method to catch runtime exceptions.

> Trash not being expunged, Trash Emptier thread gone by NPE
> ----------------------------------------------------------
>
>                 Key: HADOOP-3070
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3070
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.16.0, 0.16.1
>            Reporter: Koji Noguchi
>             Fix For: 0.16.2
>
>         Attachments: H3070.0.16.1.patch
>
>
> We noticed that the users' trash were not being expunged by the namenode. 
> jstack didn't show the Trash.Emptier thread and .out file showed 
> Exception in thread "Trash Emptier" java.lang.NullPointerException
>   at org.apache.hadoop.fs.Trash.expunge(Trash.java:146)
>   at org.apache.hadoop.fs.Trash$Emptier.run(Trash.java:233)
>   at java.lang.Thread.run(Thread.java:619)
> It seems like this happens when it hits the user's directory which doesn't contain the .Trash.

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