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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3800) QJM: improvements to QJM fault testing
Date Tue, 14 Aug 2012 01:11:38 GMT
Todd Lipcon created HDFS-3800:
---------------------------------

             Summary: 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


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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