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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-1220) Dead lock
Date Thu, 07 Feb 2013 19:45:13 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573848#comment-13573848
] 

Doug Cutting commented on AVRO-1220:
------------------------------------

Stéphane, if you (or someone else) can confirm this fix then we can include it in Avro 1.7.4.
                
> Dead lock 
> ----------
>
>                 Key: AVRO-1220
>                 URL: https://issues.apache.org/jira/browse/AVRO-1220
>             Project: Avro
>          Issue Type: Bug
>          Components: java
>    Affects Versions: 1.7.3
>         Environment: OSX, JDK6
>            Reporter: Stéphane Landelle
>             Fix For: 1.7.4
>
>         Attachments: AVRO-1220.txt, AVRO-1220.txt
>
>
> I experience a dead lock when running multiple DataFileReader in concurrent threads.
> See test case here:
> https://github.com/slandelle/avro-test
> AvroBinaryEncodingTest randomly stalls about 50% of the time.
> A thread dump would show a dead lock in org.apache.avro.io.parsing.Symbol class initialization.
> IHMO, the problem is that the Symbol class has static final members that are instances
of Symbol subclasses.
> I built a custom version of avro where all the constants (NULL, BOOLEAN, INT, etc) have
been extracted into a dedicated class outside of Symbol hierarchy and the test case now runs
fine.
> Cheers,
> Stéphane Landelle

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