High CPU due to rapid looping in TransactionReaper.check

Solution Verified - Updated -

Issue

  • We're seeing increased CPU on our JBoss server, leading to performance degradation and unresponsiveness.
  • Thread dumps and CPU data indicates the high CPU consumer is a Timer RepearThread, apparently stuck in TransactionReaper.check().

  • We are seeing our log fill up rapidly with messages like the following:

    DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] (Thread-16) TransactionReaper::check ()
DEBUG [com.arjuna.ats.arjuna.logging.arjLoggerI18N] (Thread-16) [com.arjuna.ats.arjuna.coordinator.TransactionReaper_2] - TransactionReaper::check - comparing 1323173300843

Environment

  • JBoss Enterprise Application Platform (EAP)
    • 5.1.0 and earlier

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