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From "Xiaobing Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11362) Storage#shouldReturnNextDir should check for null dirType
Date Wed, 05 Apr 2017 23:54:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15958060#comment-15958060
] 

Xiaobing Zhou commented on HDFS-11362:
--------------------------------------

The patch looks good, thanks [~hkoneru].

> Storage#shouldReturnNextDir should check for null dirType
> ---------------------------------------------------------
>
>                 Key: HDFS-11362
>                 URL: https://issues.apache.org/jira/browse/HDFS-11362
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs
>            Reporter: Hanisha Koneru
>            Assignee: Hanisha Koneru
>            Priority: Minor
>         Attachments: HDFS-11362.000.patch
>
>
> _Storage#shouldReturnNextDir_ method checks if the next Storage directory is of the same
type us dirType.
> {noformat}
>     private boolean shouldReturnNextDir() {
>       StorageDirectory sd = getStorageDir(nextIndex);
>       return (dirType == null || sd.getStorageDirType().isOfType(dirType)) &&
>           (includeShared || !sd.isShared());
>     }
> {noformat}
> There is a possibility that sd.getStorageDirType() returns null (default dirType is null).
Hence, before checking for type match, we should make sure that the value returned by sd.getStorageDirType()
is not null.



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