Transaction Reaper Thread Kill

msegreti4355 Oct 2, 2015 12:26 PM

I am using JBoss EAP 6.2.0 and was wondering if it was possible to kill a thread on a transaction timeout. I have already identified that upon a timeout the Transaction Reaper hits and releases the resources. However, that is not enough for my application. I would like, upon transaction timeout, for the thread which timed out to be terminated entirely. Thus far I have been unsuccessful in finding a way to do this. Any help would be greatly appreciated.

1. Re: Transaction Reaper Thread Kill

tomjenkinson Oct 3, 2015 3:34 PM (in response to msegreti4355)

It's not directly possible but if you are only using one thread on your transaction you could use a checkedaction implementation to call thread.stop() http://docs.jboss.org/jbosstm/latest/api/jta/com/arjuna/ats/arjuna/coordinator/CheckedAction.html

The checkedaction factory is set via the coordinator environment bean using either of:
https://github.com/jbosstm/narayana/blob/master/ArjunaCore/arjuna/classes/com/arjuna/ats/arjuna/common/CoordinatorEnvironmentBean.java#L610
https://github.com/jbosstm/narayana/blob/master/ArjunaCore/arjuna/classes/com/arjuna/ats/arjuna/common/CoordinatorEnvironmentBean.java#L657

That said, Thread.stop() is, as you will likely already know, unsafe (Thread (Java Platform SE 7 )) and not recommended.
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2. Re: Transaction Reaper Thread Kill

tomjenkinson Oct 4, 2015 2:10 AM (in response to tomjenkinson)

Just to say, there are lots of reasons that you don't want to do what you are proposing. The thread pool may not get replenished and the transaction could be put in a strange state.

I think it is better to work out why the thread is blocking.

Is there some SQL being executed that doesn't have a timeout set?
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