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From Filip Hanik - Dev Lists <devli...@hanik.com>
Subject Re: DBCP Deadlock
Date Wed, 25 Jun 2008 19:16:05 GMT
Tomcat uses 1.2.2 in that version, so I would suggest not using the 
background validation at this point

Filip

Metta wrote:
> I'm running TC 6.0.16 on 64Bit RH Linux 5.1
>
> We're seeing a deadlock in the tomcat-dbcp - looks like it's to do with the
> abandoned connection checking. I thought 6.0.16 used the commons-dbcp-1.2.2
> release which supposedly fixes this issue?
>
> =============================
> "Timer-3":
>   waiting to lock monitor 0x0000000053b40548 (object 0x00002aaabf3210f0, a
> org.apache.tomcat.dbcp.dbcp.PoolableConnection),
>   which is held by "TP-Processor27"
> "TP-Processor27":
>   waiting to lock monitor 0x0000000053b404d0 (object 0x00002aaab9fa8b08, a
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool),
>   which is held by "Timer-3"
>
> Java stack information for the threads listed above:
> ===================================================
> "Timer-3":
>         at
> org.apache.tomcat.dbcp.dbcp.AbandonedTrace.addTrace(AbandonedTrace.java:175)
>         - waiting to lock <0x00002aaabf3210f0> (a
> org.apache.tomcat.dbcp.dbcp.PoolableConnection)
>         at
> org.apache.tomcat.dbcp.dbcp.AbandonedTrace.init(AbandonedTrace.java:92)
>         at
> org.apache.tomcat.dbcp.dbcp.AbandonedTrace.<init>(AbandonedTrace.java:82)
>         at
> org.apache.tomcat.dbcp.dbcp.DelegatingStatement.<init>(DelegatingStatement.java:61)
>         at
> org.apache.tomcat.dbcp.dbcp.DelegatingConnection.createStatement(DelegatingConnection.java:224)
>         at
> org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.validateConnection(PoolableConnectionFactory.java:331)
>         at
> org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.validateObject(PoolableConnectionFactory.java:312)
>         at
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.evict(GenericObjectPool.java:1217)
>         - locked <0x00002aaab9fa8b08> (a
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool)
>         at
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool$Evictor.run(GenericObjectPool.java:1341)
>         at java.util.TimerThread.mainLoop(Timer.java:512)
>         at java.util.TimerThread.run(Timer.java:462)
> "TP-Processor27":
>         at
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.addObjectToPool(GenericObjectPool.java:1136)
>         - waiting to lock <0x00002aaab9fa8b08> (a
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool)
>         at
> org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.returnObject(GenericObjectPool.java:1076)
>         at
> org.apache.tomcat.dbcp.dbcp.PoolableConnection.close(PoolableConnection.java:87)
>         - locked <0x00002aaabf3210f0> (a
> org.apache.tomcat.dbcp.dbcp.PoolableConnection)
>         ....
>   


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