with QueuedPessimisticEJBLock, read-only shorten the duration of the lock, it does not remove it. it locks the bean for the duration of the call instead of the duration of the transaction.
julien CM> As I understand it, methods marked as read-only on an entity bean shouldn't try and lock the bean when they are called. So, if I have two instances of an entity bean (same bean class, different CM> PK), they can call read-only methods on each other at the same time. CM> So, can anyone explain why I'm seeing ApplicationDeadlockExceptions on read-only methods in my application? Example stack trace: CM> org.jboss.ejb.plugins.lock.ApplicationDeadlockException: Application deadlock detected: Two or more transactions contention. CM> at org.jboss.ejb.plugins.lock.BeanLockSupport.deadlockDetection(BeanLockSupport.java:138) CM> at org.jboss.ejb.plugins.lock.QueuedPessimisticEJBLock.waitForTx(QueuedPessimisticEJBLock.java:270) CM> at org.jboss.ejb.plugins.lock.QueuedPessimisticEJBLock.doSchedule(QueuedPessimisticEJBLock.java:209) CM> at org.jboss.ejb.plugins.lock.QueuedPessimisticEJBLock.schedule(QueuedPessimisticEJBLock.java:157) CM> at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:85) CM> at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:53) CM> at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84) CM> at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:243) CM> at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104) CM> at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:117) CM> at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191) CM> at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122) CM> at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:483) CM> at org.jboss.ejb.Container.invoke(Container.java:674) CM> at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:353) CM> at org.jboss.ejb.plugins.local.EntityProxy.invoke(EntityProxy.java:38) CM> at $Proxy80.getUrlPathNoSlash(Unknown Source) CM> at uk.ac.warwick.cms.model.PageLocation.getChildLocations(PageLocation.java:743) CM> getUrlPathNoSlash() is, as far as I can tell, marked as read-only, and it's basically just a call to a CMP accessor with a little bit of string parsing CM> relevant chunk of jboss.xml CM> <entity> CM> <ejb-name>PageLocationEntity</ejb-name> CM> <local-jndi-name>ejb/cms/PageLocationEntity</local-jndi-name> CM> <method-attributes> CM> <method-name>get*</method-name> CM> <read-only>true</read-only> CM> </method-attributes> CM> </entity> CM> Can anyone help, or point me in the right direction? CM> thanks, CM> Chris CM> ------------------------------------------------------- CM> This SF.Net email sponsored by: Free pre-built ASP.NET sites including CM> Data Reports, E-commerce, Portals, and Forums are available now. CM> Download today and enter to win an XBOX or Visual Studio .NET. CM> http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 CM> _______________________________________________ CM> JBoss-user mailing list CM> [EMAIL PROTECTED] CM> https://lists.sourceforge.net/lists/listinfo/jboss-user -- Best regards, julien mailto:[EMAIL PROTECTED] ------------------------------------------------------- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet_072303_01/01 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
