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Date: Wed, 7 Nov 2012 01:02:12 +0000 (UTC)
From: "Aaron T. Myers (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-4158) FSDirectory#hasSnapshot will NPE
 when deleting an empty directory
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    [ https://issues.apache.org/jira/browse/HDFS-4158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492010#comment-13492010 ] 

Aaron T. Myers commented on HDFS-4158:
--------------------------------------

Forgot to mention - the snapshots branch doesn't currently compile without HDFS-4150, so I tested this patch by applying the latest patch there first.
                
> FSDirectory#hasSnapshot will NPE when deleting an empty directory
> -----------------------------------------------------------------
>
>                 Key: HDFS-4158
>                 URL: https://issues.apache.org/jira/browse/HDFS-4158
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: Snapshot (HDFS-2802)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-4158.patch
>
>
> The method attempts to iterate over the child list of the directory, but that list may be null and this isn't handled currently.

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