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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3845) Fixes for edge cases in QJM recovery protocol
Date Mon, 27 Aug 2012 19:46:07 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HDFS-3845:

    Attachment: hdfs-3845.txt

Here's the same patch with just a bit more spit and polish (eg added some javadoc, cleaned
up a few comments, and removed some spurious whitespace changes). Functionally identical.
I verified that all of the QJM test cases pass.
> Fixes for edge cases in QJM recovery protocol
> ---------------------------------------------
>                 Key: HDFS-3845
>                 URL: https://issues.apache.org/jira/browse/HDFS-3845
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>         Attachments: hdfs-3845.txt, hdfs-3845.txt, hdfs-3845.txt
> After running the randomized tests from HDFS-3800 for several machine-weeks, we identified
a few edge cases in the recovery protocol that weren't properly designed for. This JIRA is
to modify the protocol slightly to address these edge cases.

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