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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3800) QJM: improvements to QJM fault testing
Date Wed, 15 Aug 2012 01:00:40 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434712#comment-13434712

Todd Lipcon commented on HDFS-3800:

Thanks, will commit to branch momentarily with the log message addressed.
> QJM: improvements to QJM fault testing
> --------------------------------------
>                 Key: HDFS-3800
>                 URL: https://issues.apache.org/jira/browse/HDFS-3800
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-3800.txt
> This JIRA improves TestQJMWithFaults as follows:
> - the current implementation didn't properly unwrap exceptions thrown by the reflection-based
injection method. This caused some issues in the code where the injecting proxy didn't act
quite like the original object.
> - the current implementation incorrectly assumed that the recovery process would recover
to _exactly_ the last acked sequence number. In fact, it may recover to that transaction _or
any greater transaction_.
> It also adds a new randomized test which uncovered a number of other bugs. I will defer
to the included javadoc for a description of this test.

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