[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1786) JTASessionContext.CleanupSynch does not remove sessions from currentSessionMap

[Reggie Riser (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_27871 ] 

Reggie Riser commented on HHH-1786:
-----------------------------------

Steve ... I followed up again with the WebSphere Transaction Architect.  Here's what he said:

"The new integration points are publically available in WAS since 6.0.2.19 and 6.1.0.9, but not before. The javadoc for this API missed 6.0.2.19 and will be part of 6.0.2.23.

Having said that, the ExtendedJTATransaction interface that Hibernate is using is and remains fully supported, so they won't need to change to move away from that;  the new APIs offer context management integration (e.g. suspend/resume) which Hibernate doesn't need."


> JTASessionContext.CleanupSynch does not remove sessions from currentSessionMap
> ------------------------------------------------------------------------------
>
>                 Key: HHH-1786
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1786
>             Project: Hibernate3
>          Issue Type: Improvement
>    Affects Versions: 3.1.2
>         Environment: IBM WebSphere 6.0.2.7, Hibernate CVS snapshot from 2006-02-24
>            Reporter: Tomi Szabo
>            Assignee: Steve Ebersole
>             Fix For: 3.3
>
>         Attachments: JTASessionContext.java, WebSphereExtendedJTATransactionLookup.java, WebSphereExtendedJTATransactionLookup.patch.txt
>
>
> We are using JTASessionContext, CMTTransaction and WebSphereExtendedJTATransactionLookup. We have experienced some memmory leak problems and after closer inspection we have found that Hibernate sessions are not removed from currentSessionMap inside JTASessionContext.
> Method JTASessionContext.CleanupSynch.afterCompletion() is called as expected but code "context.currentSessionMap.remove( txn );" does not remove session from Map because of key's hashcode has changed. This is due to fact that com.ibm.websphere.jtaextensions.ExtendedJTATransaction.hashCode is actually ID of underlaying transaction. But if it comes to the afterCompletion method in CleanupSynch the underlaying transaction is already closed. Closed transaction has ID 0 (default value) and it is different from ID under which the Hibernate session was previously inserted into Map.
> Possible patch is in attachements.

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