[jbossts-issues] [JBoss JIRA] (JBTM-2256) Race condition between recovery manager initialization and expiry scanner

[Mark Little (JIRA)]

    [ https://issues.jboss.org/browse/JBTM-2256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004375#comment-13004375 ] 

Mark Little commented on JBTM-2256:
-----------------------------------

OK. I'm more interested in ensuring we have some (semi)automated test to verify the fix and that nothing like this creeps in again. How that is done is not that important.

> Race condition between recovery manager initialization and expiry scanner
> -------------------------------------------------------------------------
>
>                 Key: JBTM-2256
>                 URL: https://issues.jboss.org/browse/JBTM-2256
>             Project: JBoss Transaction Manager
>          Issue Type: Bug
>          Components: Transaction Core
>            Reporter: Gytis Trikleris
>            Assignee: Gytis Trikleris
>             Fix For: 4.17.23, 5.0.4
>
>
> In a constructor of RecoveryManagerImple expiry scanner is started before initiating PeriodicRecovery. This causes a problem from time to time, because during the initiation of PeriodicRecovery (more exact XARecoveryModule) ExtendedResourceRecord is added to the RecordTypeManager. It has to be there during the expiry scan execution. Since expiry scanner works in a separate thread it works most of the time, but race condition still exists. Personally I couldn't reproduce the problem.
> Swapping these two actions should solve the problem.



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