[jbossts-issues] [JBoss JIRA] (JBTM-1354) JCA recovery race condition

Tom Jenkinson (JIRA) jira-events at lists.jboss.org
Mon Nov 26 09:29:21 EST 2012

Tom Jenkinson created JBTM-1354:

             Summary: JCA recovery race condition
                 Key: JBTM-1354
                 URL: https://issues.jboss.org/browse/JBTM-1354
             Project: JBoss Transaction Manager
          Issue Type: Bug
      Security Level: Public (Everyone can see)
            Reporter: Tom Jenkinson
            Assignee: Tom Jenkinson
             Fix For: 4.17.3, 5.0.0.M2

Evidenced in SimpleIsolatedServers::testSimultaneousRecovery

Basically XATerminatorImple -> SAA::activate() -> XAResourceRecord::restore_state() -> getNewXAResource() -> XARecoveryModule::getNewXAResource()

At this point _xidScans may be none-null but still only partial from the first scan: periodicWorkSecondPass -> bottomUpRecovery -> resourceInitiatedRecoveryForRecoveryHelpers -> xaRecovery 

if (_xidScans == null)
				_xidScans = new Hashtable<XAResource,RecoveryXids>();

What I am not sure of is whether we should synchronize bottomUpRecovery and getNewXAResource as that would stop this race condition. Gonna give that a whirl.

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