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From "Dave Brosius (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-4312) fix OOM with ReadMessageTest.testNoCommitLog
Date Wed, 06 Jun 2012 04:08:23 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dave Brosius updated CASSANDRA-4312:
------------------------------------

    Attachment: fix_oom_in_readmessagetest.txt
    
> fix OOM with ReadMessageTest.testNoCommitLog
> --------------------------------------------
>
>                 Key: CASSANDRA-4312
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4312
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tests
>    Affects Versions: 1.2
>            Reporter: Dave Brosius
>            Priority: Trivial
>             Fix For: 1.2
>
>         Attachments: fix_oom_in_readmessagetest.txt
>
>
> this test can throw OOMs, because it uses a FileReader and readLine to read the commit
log. However, some commit logs are fully allocated, but not initialized, (all 0s) so finding
an EOL means reading 134M of data. Even for commit logs that have data they really aren't
filereader-type streams.
> changed to do simple byte finding in the streams instead.

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