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| Simulating XA failure |
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| yashgt |
 Posted: Thu May 19, 2016 6:25 am Post subject: Simulating XA failure |
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Apprentice
Joined: 11 Nov 2014
Posts: 38
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MQ Manager when used as a Transaction Coordinator, uses Two-phase commit protocol. It first issues a Ready-to-commit query to the resource managers. If they all are ready, the Commit is issued. I want to simulate a failure where the Ready to Commit succeeded and the Commit for one of the resource managers failed, resulting in the transaction becoming in-doubt.
All operations happen so fast that I do not get a chance to artificially kill a process or cause a failure. Any ideas on how I can acheive this? Is there a hook I can use? The UOW_COMMIT hook in the API exit functions seems to be at the Commit statement level and not at the su-step such as Ready to Commit.
Thanks,
Yash |
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| Andyh |
| Posted: Thu May 19, 2016 9:17 am Post subject: |
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Master
Joined: 29 Jul 2010
Posts: 239
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Writing a 'dummy' resource manager would be one way of doing this,
another would be to trace the MQCMIT flow and inject a break under the debugger into some internal MQ function called after the RM's have been prepared.
More realistic might be to set up a workload and to kill various components of the workload (e.g the QMgr or the DB) while it's in full flow. |
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| hughson |
| Posted: Thu May 19, 2016 1:48 pm Post subject: |
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Padawan
Joined: 09 May 2013
Posts: 1959
Location: Bay of Plenty, New Zealand
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| yashgt |
| Posted: Mon May 23, 2016 8:49 pm Post subject: |
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Apprentice
Joined: 11 Nov 2014
Posts: 38
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