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Date: Thu, 19 Feb 2015 15:44:11 +0000 (UTC)
From: "Bernhard Trummer (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Message-ID: <JIRA.12776191.1424360286000.87226.1424360651502@Atlassian.JIRA>
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 <JIRA.12776191.1424360286030@arcas>
Subject: [jira] [Updated] (AMQ-5601) XA suspend/resume ending in a rollback
 not working properly (quick-fix attached)
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     [ https://issues.apache.org/jira/browse/AMQ-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bernhard Trummer updated AMQ-5601:
----------------------------------
    Attachment: xa-suspend-resume-quick-fix.diff

attached the "works for me" quick fix.

> XA suspend/resume ending in a rollback not working properly (quick-fix attached)
> --------------------------------------------------------------------------------
>
>                 Key: AMQ-5601
>                 URL: https://issues.apache.org/jira/browse/AMQ-5601
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMS client
>    Affects Versions: 5.8.0, 5.10.0, 5.11.0
>         Environment: Linux (Debian squeeze)
> WebLogic Server 10.3.6.0 with a "Foreign Server" JMS module pointing to ActiveMQ.
> WebLogic and ActiveMQ running locally.
>            Reporter: Bernhard Trummer
>         Attachments: xa-suspend-resume-quick-fix.diff
>
>
> The setup:
> - ActiveMQ with the default configuration providing one queue.
> - WebLogic server having
> -- a "Foreign Server" JMS module configured pointing to the ActiveMQ's queue
> -- a simple EJB3 MDB hooked up to this queue via XAConnectionFactory.
> What the MDB does:
> It's annotated with @TransactionAttribute(TransactionAttributeType.REQUIRED), thus enforcing an XA transaction.
> It calls a method from a @Local EJB, which is annotated with @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW).
> Depending on the JMS message content, it calls mdc.setRollbackOnly() to enforce a rollback.
> What's happening in the OK case:
> - you place a message to the ActiveMQ queue.
> - the message is picked up by the activemq-client at WebLogic.
> - the MDB is called within an XA transaction.
> - when the @Local bean is called, this XA transaction is suspended (TransactionContext.end() with flags == TMSUSPEND).
> - when the @Local bean returns, the transaction is continued again (TransactionContext.begin() with flags == TMRESUME).
> - finally, end() with flags == TMSUCCESS and commit() is called.
> What's happening in the Rollback case:
> - the same until the transaction is resumed
> - end() with flags == TMFAIL and rollback() is called.
> But, what's going wrong is:
> - TransactionContext.beforeEnd() is already called during the end() / TMSUSPEND call, which in my opinion does "too much" communication with the broker, because a suspend doesn't necessarily mean that the transaction will be ok in the end.
> - the message stays in the ActiveMQ queue (I have no explanation for that...).
> - there's no redelivery of the message to the MDB, as if the message is somehow "lost" somewhere within the activemq-client datastructures.
> - if WebLogic is shut down, then the message is really "lost" because it also vanishes from the ActiveMQ queue.
> For our project, I'm going to deploy the attached quick fix, where I just will "ignore" the TMSUSPEND / TMRESUME calls to the begin() and end() methods in TransactionContext.
> So the beforeEnd() method is not called during suspend and in the end every "ok" and "rollback" scenarios I tested worked perfectly for me.
> I would understand if you don't take over this patch to the ActiveMQ code base, because it's in fact "ignoring" XA suspend/resume calls completely instead of implementing them properly.
> However, I created this issue anyway, because the patch might be of interest for other people. Of course without any guarantees that this "works for me" patch also "works for you". :-)
> BTW:
> Is a proper implementation of XA suspend/resume on any roadmap?
> Thanks.


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