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From "kanaka kumar avvaru (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8029) NPE during disk usage calculation on snapshot directory, after a sub folder is deleted
Date Wed, 01 Apr 2015 12:33:53 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390484#comment-14390484
] 

kanaka kumar avvaru commented on HDFS-8029:
-------------------------------------------

[~xyao] , the steps are same as mentioned. But it seems the patch for HDFS-7824  given by
you last week fixed this issue too.
So, in the latest trunk its not reproducing. The earlier version of code was having this issue.

> NPE during disk usage calculation on snapshot directory, after a sub folder is deleted
> --------------------------------------------------------------------------------------
>
>                 Key: HDFS-8029
>                 URL: https://issues.apache.org/jira/browse/HDFS-8029
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: kanaka kumar avvaru
>            Assignee: kanaka kumar avvaru
>
> ContentSummary computation is causing NullPointerException on snapshot directory if some
sub directory is deleted.
>   Following are the steps to reproduce the issue.
>   
>   1. Create a root directory "/test"
>   2. Create sub dir named as  /test/sub1
>   3. Create sub dir in sub1 as  /test/sub1/sub2
>   4. Create a file at  /test/sub1/file1
>   5. Create a file at /test/sub1/sub2/file1
>   6. Enable shotshot on sub1 (hadoop dfsadmin -allowSnapshot test/sub1)
>   7. Create snapshot1 on /test/sub1
>   8. Delete directory /test/sub1/sub2 (recursively)
>   9. Create  snapshot2 on /test/sub1
>   10. Execute du command on /test (hadoop fs -du  /test/) 
>   
>   
>   Gives NullPointerException in CLI. NameNode logs the exception as
>   ... java.lang.NullPointerException	at org.apache.hadoop.hdfs.server.namenode.ContentSummaryComputationContext.getBlockStoragePolicySuite(ContentSummaryComputationContext.java:122)
...
>   



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