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From Stéphane Landelle (JIRA) <j...@apache.org>
Subject [jira] [Created] (AVRO-1220) Dead lock
Date Thu, 13 Dec 2012 21:54:12 GMT
Stéphane Landelle created AVRO-1220:
---------------------------------------

             Summary: 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


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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