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From "Aaron T. Myers (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2974) HA: MiniDFSCluster does not delete standby NN name dirs during format
Date Sun, 19 Feb 2012 20:28:40 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron T. Myers updated HDFS-2974:
---------------------------------

    Attachment: HDFS-2952-HDFS-1623.patch

Here's a patch which addresses the issue.

This was discovered because of the commit of HDFS-2952. I didn't notice this problem because
when I ran the HA tests, it just so happened that TestDFSUpgradeWithHA was run last, and thus
it did not interfere with any other test. To test this patch, I ran the following, which results
in TestDFSUpgradeWithHA running before the other test:

{code}
mvn -Dtest=TestDFSUpgradeWithHA,TestDNFencingWithReplication test
{code}


Without this patch, TestDNFencingWithReplication should fail.
                
> HA: MiniDFSCluster does not delete standby NN name dirs during format
> ---------------------------------------------------------------------
>
>                 Key: HDFS-2974
>                 URL: https://issues.apache.org/jira/browse/HDFS-2974
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, test
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HDFS-2952-HDFS-1623.patch
>
>
> When the MiniDFSCluster is formtting an HA cluster, it formats the first NN, and then
copies the contents of that directory to the second NNs name dirs. However, the second NNs
name dirs are not emptied first, and thus a previous test's state may interfere with the test.

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