Re: [Springframework-developer] Cannot passivate stateful session bean (again!)

[Colin S. <col...@ex...>]

I've made the logger non-final so that stateful session bean subclasses 
can remove and restore it in ejbPassivate/ejbActivate, respectively.

I considered nulling out the BeanFactoryLoader automatically on the 
unload call. On the other hand, I don't think this is always appropriate 
since some people don't use the default loader. I use my own loader for 
example, which is serializable, so there is no need to reset it each 
time (although I'm not using stateful beans anyways).


Alastair Rodgers wrote:

>Hi, 
>
>I've only just subscribed to the dev list, but someone told me there was a discussion earlier this week about failure to passivate stateful session beans. This was caused by the bean factory reference not being set to null on passivation. 
>
>I've come across a related problem, which seems to be due to the logger field in AbstractEnterpriseBean - I can't set its reference to null in ejbPassivate() because its final, so when my bean tries to passivate I get an exception saying that org.apache.commons.logging.impl.Log4JCategoryLog is not serializable (stacktrace below).
>
>Also, I've just taken a look at AbstractEnterpriseBean in CVS and it seems that unloadBeanFactory() only sets the ref to beanFactory to null, whereas the beanFactoryLoader ref remains set. I know I could just call setBeanFactoryLoader() in ejbPassivate() to set it to null, but wouldn't it be clearer to just have a single unload() method which unloads both references?
>
>Anyway, that aside, Spring is fantastic! Thanks.
>
>Al.
>
>
>
>javax.ejb.EJBException: Could not passivate; failed to save state; CausedByException is:
>	org.apache.commons.logging.impl.Log4JCategoryLog
>	at org.jboss.ejb.plugins.StatefulSessionFilePersistenceManager.passivateSession(StatefulSessionFilePersistenceManager.java:378)
>	at org.jboss.ejb.plugins.StatefulSessionInstanceCache.passivate(StatefulSessionInstanceCache.java:85)
>	at org.jboss.ejb.plugins.AbstractInstanceCache.tryToPassivate(AbstractInstanceCache.java:156)
>	at org.jboss.ejb.plugins.LRUEnterpriseContextCachePolicy$OveragerTask.run(LRUEnterpriseContextCachePolicy.java:435)
>	at java.util.TimerThread.mainLoop(Timer.java:432)
>	at java.util.TimerThread.run(Timer.java:382)
>java.io.NotSerializableException: org.apache.commons.logging.impl.Log4JCategoryLog
>	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
>	at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
>	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1304)
>	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
>	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
>	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
>	at org.jboss.ejb.plugins.StatefulSessionFilePersistenceManager.passivateSession(StatefulSessionFilePersistenceManager.java:370)
>	at org.jboss.ejb.plugins.StatefulSessionInstanceCache.passivate(StatefulSessionInstanceCache.java:85)
>	at org.jboss.ejb.plugins.AbstractInstanceCache.tryToPassivate(AbstractInstanceCache.java:156)
>	at org.jboss.ejb.plugins.LRUEnterpriseContextCachePolicy$OveragerTask.run(LRUEnterpriseContextCachePolicy.java:435)
>	at java.util.TimerThread.mainLoop(Timer.java:432)
>	at java.util.TimerThread.run(Timer.java:382)
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