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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12056) DiskChecker#checkDirs should check null pointer for the return value from File#listFiles to avoid NPE.
Date Wed, 03 Jun 2015 23:40:38 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

zhihai xu updated HADOOP-12056:
-------------------------------
    Attachment: HADOOP-12056.001.patch

> DiskChecker#checkDirs should check null pointer for the return value from File#listFiles
to avoid NPE.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-12056
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12056
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.7.0
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: HADOOP-12056.000.patch, HADOOP-12056.001.patch
>
>
> DiskChecker#checkDirs should check null pointer for the return value from File#listFiles.
Based on the document for File#listFiles at https://docs.oracle.com/javase/7/docs/api/java/io/File.html#listFiles()
:
> {code}
> Returns null if an I/O error occurs.
> {code}
> So it will be good to check null pointer and throw DiskErrorException if it is null.



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