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From Metta <matthew.cl...@despatch.net>
Subject DBCP Deadlock
Date Thu, 19 Jun 2008 08:22:15 GMT

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)
        ....
-- 
View this message in context: http://www.nabble.com/DBCP-Deadlock-tp17999703p17999703.html
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