Dead lock using the evictor
---------------------------
Key: DBCP-270
URL: https://issues.apache.org/jira/browse/DBCP-270
Project: Commons Dbcp
Issue Type: Bug
Affects Versions: 1.2.2
Reporter: Filip Hanik
Priority: Critical
Patch attached, dead lock reported. the abandonedtrace does synchronized(this)
when it really only needs to do synchronized(this.trace)
Dead lock reported when using the evictor
=============================
"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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