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Date: Thu, 13 Dec 2012 21:54:12 +0000 (UTC)
From: =?utf-8?Q?St=C3=A9phane_Landelle_=28JIRA=29?= <jira@apache.org>
To: dev@avro.apache.org
Message-ID: <JIRA.12623840.1355435553698.3272.1355435652137@arcas>
In-Reply-To: <JIRA.12623840.1355435553698@arcas>
References: <JIRA.12623840.1355435553698@arcas>
Subject: [jira] [Created] (AVRO-1220) Dead lock
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St=C3=A9phane Landelle created AVRO-1220:
---------------------------------------

             Summary: Dead lock=20
                 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: St=C3=A9phane 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 c=
lass initialization.

IHMO, the problem is that the Symbol class has static final members that ar=
e instances of Symbol subclasses.

I built a custom version of avro where all the constants (NULL, BOOLEAN, IN=
T, etc) have been extracted into a dedicated class outside of Symbol hierar=
chy and the test case now runs fine.

Cheers,

St=C3=A9phane Landelle

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