I have some odd errors showing up in my Seam app. I am hoping that someone
here can provide a little guidance.
Caused by: java.lang.IllegalStateException: could not acquire lock on
@Synchronized component: mailQueue
the mailQueue component is session scoped, isn't synchronized by me, nor can I
figure out why there would be any lock contention on it. The error occurs when
a property on the component is referenced from a page.
Caused by: javax.el.ELException: /email.xhtml @12,50
rendered="#{!mailQueue.expired}": Error reading 'expired' on type
com.digitalsanctuary.seam.SessionMailQueue_$$_javassist_4
| at
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
| at
javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:370)
This happens rarely, but does occur more than once.
I also get about 100+ of these:
02:13:30,821 WARN [arjLoggerI18N]
[com.arjuna.ats.arjuna.coordinator.BasicAction_58] - Abort of action id
4b7ed37a:bc61:471a5fe3:d8b98 invoked while multiple threads active within it.
| 02:13:30,821 WARN [arjLoggerI18N]
[com.arjuna.ats.arjuna.coordinator.CheckedAction_2] - CheckedAction::check -
atomic action 4b7ed37a:bc61:471a5fe3:d8b98 aborting with 1 threads active!
Followed up by:
02:21:47,763 ERROR [STDERR] Exception in thread "Timer-0"
| 02:22:31,160 ERROR [STDERR] Exception in thread "Thread-4"
| 02:22:41,379 ERROR [STDERR] java.lang.OutOfMemoryError: Java heap space
| 02:25:13,302 ERROR [SeamPhaseListener] uncaught exception
| 02:27:50,873 ERROR [SeamPhaseListener] uncaught exception
And then I'm out of memory and everything blows up from there.
Any ideas? The application is very simple, and used to run for months without
issue.
I don't understand why there would be lock contention issues with the
mailQueue, and I don't know what the arjuna coordinator is doing or why it's
failing.
Thanks!
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