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Posted to common-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2016/05/13 00:01:22 UTC
[jira] [Commented] (HADOOP-13140) GlobalStorageStatistics should
check null FileSystem scheme to avoid NPE
[ https://issues.apache.org/jira/browse/HADOOP-13140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15282256#comment-15282256 ]
Arpit Agarwal commented on HADOOP-13140:
----------------------------------------
I wonder if the test failure has exposed a backwards compatibility issue. There may be applications using RawLocalFileSystem that are calling {{FileSystem#initialize}} the same way. Should we handle the null scheme without failing?
> GlobalStorageStatistics should check null FileSystem scheme to avoid NPE
> ------------------------------------------------------------------------
>
> Key: HADOOP-13140
> URL: https://issues.apache.org/jira/browse/HADOOP-13140
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.8.0
> Reporter: Brahma Reddy Battula
> Assignee: Mingliang Liu
> Attachments: HADOOP-13140.000.patch
>
>
> {{org.apache.hadoop.fs.GlobalStorageStatistics#put}} is not checking the null scheme, and the internal map will complain NPE. This was reported by a flaky test {{TestFileSystemApplicationHistoryStore}}. Thanks [~brahmareddy] for reporting.
> To address this,
> # Fix the test by providing a valid URI, e.g. {{file:///}}
> # Guard the null scheme in {{GlobalStorageStatistics#put}}
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