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Posted to hdfs-issues@hadoop.apache.org by "Íñigo Goiri (JIRA)" <ji...@apache.org> on 2018/06/14 00:49:00 UTC

[jira] [Assigned] (HDFS-13673) TestNameNodeMetrics fails on Windows

     [ https://issues.apache.org/jira/browse/HDFS-13673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Íñigo Goiri reassigned HDFS-13673:
----------------------------------

    Assignee: Zuoming Zhang

> TestNameNodeMetrics fails on Windows
> ------------------------------------
>
>                 Key: HDFS-13673
>                 URL: https://issues.apache.org/jira/browse/HDFS-13673
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 3.1.0, 2.9.1
>            Reporter: Zuoming Zhang
>            Assignee: Zuoming Zhang
>            Priority: Minor
>              Labels: Windows
>             Fix For: 3.1.0, 2.9.1
>
>         Attachments: HDFS-13673.000.patch, TestNameNodeMetrics-testVolumeFailures-Report.000.txt
>
>
> _TestNameNodeMetrics_ fails on Windows
>  
> Problem:
> This is because in _testVolumeFailures_, it tries to call _DataNodeTestUtils.injectDataDirFailure_ on a volume folder. What _injectDataDirFailure_does is actually modifying the folder name from _volume_name_ to _volume_name_._origin_ and create a new file named as _volume_name_. Inside the folder, it has two things: 1. a directory named as "_current_", 2. a file named as "_in_use.lock_". Windows behaves different from Linux when renaming the parent folder of a locked file. Windows prevent you from renaming while Linux allows.
> Fix:
> So in order to inject data failure on to the volume. Instead of renaming the volume folder itself. Rename the folder inside it which doesn't hold a lock. Since the folder inside the volume is "_current_". Then we only need to inject data failure to _volume_name/current_.



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