[jbossts-issues] [JBoss JIRA] Updated: (JBTM-226) Possible race condition between top-down and bottom-up recovery

Mark Little (JIRA) jira-events at lists.jboss.org
Wed Oct 24 06:11:01 EDT 2007

     [ http://jira.jboss.com/jira/browse/JBTM-226?page=all ]

Mark Little updated JBTM-226:

    Fix Version/s: 4.4
                       (was: 4.6)

> Possible race condition between top-down and bottom-up recovery
> ---------------------------------------------------------------
>                 Key: JBTM-226
>                 URL: http://jira.jboss.com/jira/browse/JBTM-226
>             Project: JBoss Transaction Manager
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: JTA Implementation
>    Affects Versions: 4.2.3.SP4
>         Environment: Mac OS X, JDK 1.4.2.
>            Reporter: Mark Little
>         Assigned To: Mark Little
>            Priority: Critical
>             Fix For: 4.4
> In local JTA recovery for non-serializable XAResources, the XAResourceRecovery implementation is needed to obtain a new XAResource. If a new resource isn't obtained (because the XAResourceRecovery instances haven't all been triggered yet), top-down recovery retries on subsequent recovery sweeps. Meanwhile, bottom up recovery can kick in and use an XAResource from a XAResourceRecovery that is now available and fail to locate any information on the transaction that will drive it top-down. Upon failing to find the transaction, it uses presumed abort and rolls back the instance, when in fact it should wait and commit it. But it doesn't do that until several phases have passed, and in which case most of the time top-down recovery will have re-run, found the XAResource and committed the transaction.
> I'm fairly sure this is a race condition and does exist, but am still checking. Work around exists at the moment though.

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