DBCP Locking Up
---------------
Key: DBCP-277
URL: https://issues.apache.org/jira/browse/DBCP-277
Project: Commons Dbcp
Issue Type: Bug
Affects Versions: 1.2.2
Reporter: Jörg Hohwiller
We had hanging threads that stalled in SocketInputStream.socketRead0 via
Oracle-JDBC-Driver in our tomcat.
Because we found DBCP-28, we decided to update to version 1.2.2 of commons-dbcp.
Since that our Problems got worse because we experience some sort of deadlock
in commons-dbcp.
Thread-Dumps after a nightly loadtest expose that threads got stuck in
GenericObjectPool.returnObject, while others wait in borrowObject.
We stopped the load and waited for hours. The thread-dump still looks the same:
"TP-Processor1361" daemon prio=1 tid=0x67379fb8 nid=0x36e9 waiting for monitor
entry [0x5f5cb000..0x5f5cc0c0]
at
org.apache.commons.pool.impl.GenericObjectPool.returnObject(GenericObjectPool.java:916)
- waiting to lock <0x716c4e50> (a
org.apache.commons.pool.impl.GenericObjectPool)
at
org.apache.commons.dbcp.PoolableConnection.close(PoolableConnection.java:87)
- locked <0x7a6d0408> (a org.apache.commons.dbcp.PoolableConnection)
at
org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.close(PoolingDataSource.java:181)
at
org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.closeConnection(LocalDataSourceConnectionProvider.java:96)
at
org.hibernate.jdbc.ConnectionManager.closeConnection(ConnectionManager.java:451)
at
org.hibernate.jdbc.ConnectionManager.cleanup(ConnectionManager.java:385)
at
org.hibernate.jdbc.ConnectionManager.close(ConnectionManager.java:324)
at org.hibernate.impl.SessionImpl.close(SessionImpl.java:298)
at
org.springframework.orm.hibernate3.SessionFactoryUtils.closeSession(SessionFactoryUtils.java:774)
at
org.springframework.orm.hibernate3.SessionFactoryUtils.closeSessionOrRegisterDeferredClose(SessionFactoryUtils.java:760)
at
org.springframework.orm.hibernate3.HibernateTransactionManager.doCleanupAfterCompletion(HibernateTransactionManager.java:674)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.cleanupAfterCompletion(AbstractPlatformTransactionManager.java:966)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:759)
at
org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:678)
...
The same issue was already discussed on the mailing-list so we are not the only
ones with this problem:
http://mail-archives.apache.org/mod_mbox/commons-user/200712.mbox/[EMAIL
PROTECTED]
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