What does [com.arjuna.ats.arjuna.logging.arjLogger] in my log mean?

[Nathan Russell]

I'm working on a web application that is to be deployed to Jboss. When the application gets load tested with Jmeter; after less that an hour I get the following messages in server.log every 2 minutes:

2009-01-03 21:27:44,943 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] Periodic recovery - first pass <Sat, 3 Jan 2009 21:27:44>
2009-01-03 21:27:44,943 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] StatusModule: first pass 
2009-01-03 21:27:44,943 DEBUG [com.arjuna.ats.txoj.logging.txojLoggerI18N] [com.arjuna.ats.internal.txoj.recovery.TORecoveryModule_3] - TORecoveryModule - first pass
2009-01-03 21:27:44,943 DEBUG [com.arjuna.ats.jta.logging.loggerI18N] [com.arjuna.ats.internal.jta.recovery.info.firstpass] Local XARecoveryModule - first pass
2009-01-03 21:27:55,724 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] Periodic recovery - second pass <Sat, 3 Jan 2009 21:27:55>
2009-01-03 21:27:55,724 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] AtomicActionRecoveryModule: Second pass 
2009-01-03 21:27:55,724 DEBUG [com.arjuna.ats.txoj.logging.txojLoggerI18N] [com.arjuna.ats.internal.txoj.recovery.TORecoveryModule_6] - TORecoveryModule - second pass
2009-01-03 21:27:55,724 DEBUG [com.arjuna.ats.jta.logging.loggerI18N] [com.arjuna.ats.internal.jta.recovery.info.secondpass] Local XARecoveryModule - second pass

Every 2 minutes this happens, and during the period (approx 11 seconds in above example), the Jmeter task pauses.

I'm no Jboss expert; and googling for key words from the above text has so far drawn a blank.
Does anyone know what these messages mean? What is Jboss doing when it logs these messages? Should I worry about them?

Cheers

Nathan

[Jaikiran Pai]

You need not worry about them. From what i remember, there's a thread which is scheduled every 2 minutes to check the transactions that are in progress and see if any of them has timed out.