<div dir="auto">Yes, I tried on yesterday and this workaround solved.<div dir="auto">Thanks </div><div dir="auto">Ignazio</div></div><br><div class="gmail_quote"><div dir="ltr">Il giorno Lun 17 Dic 2018 20:38 Joe Topjian <<a href="mailto:joe@topjian.net">joe@topjian.net</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Ignazio,</div><div><br></div><div>Do you currently have HAProxy configured to route requests to multiple
MariaDB nodes? If so, as a workaround, try doing an active/backup
configuration where all but 1 node is configured as an HAProxy "backup".
<br></div><div><br></div><div>Thanks,</div><div>Joe<br></div><div><br></div><br><br><div class="gmail_quote"><div dir="ltr">On Sun, Dec 16, 2018 at 10:46 PM Ignazio Cassano <<a href="mailto:ignaziocassano@gmail.com" target="_blank" rel="noreferrer">ignaziocassano@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Hello Zane, it happens also when I create a magnum cluster .<div dir="auto">My mariadb cluster is behind haproxy. </div><div dir="auto">Do you need any other info?</div><div dir="auto">Thanks </div><div dir="auto">Ignazio</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr">Il giorno Lun 17 Dic 2018 00:28 Zane Bitter <<a href="mailto:zbitter@redhat.com" target="_blank" rel="noreferrer">zbitter@redhat.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 14/12/18 4:06 AM, Ignazio Cassano wrote:<br>
> Hi All,<br>
> I installed queens on centos 7.<br>
> Heat seems to work fine with templates I wrote but when I create magnum <br>
> cluster<br>
> I often face with db deadlock in heat-engine log:<br>
<br>
The stacktrace below is in stack delete, so do you mean that the problem <br>
occurs when deleting a Magnum cluster, or can it occur any time with a <br>
magnum cluster?<br>
<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource Traceback (most <br>
> recent call last):<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/resource.py", line 918, in <br>
> _action_recorder<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource yield<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/resource.py", line 2035, <br>
> in delete<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource *action_args)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 346, <br>
> in wrapper<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource step = <br>
> next(subtask)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/resource.py", line 977, in <br>
> action_handler_task<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource done = <br>
> check(handler_data)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/resources/stack_resource.py", <br>
> line 587, in check_delete_complete<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource return <br>
> self._check_status_complete(self.DELETE)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource File <br>
> "/usr/lib/python2.7/site-packages/heat/engine/resources/stack_resource.py", <br>
> line 454, in _check_status_complete<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource action=action)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource <br>
> ResourceFailure: resources[0]: (pymysql.err.InternalError) (1213, <br>
> u'Deadlock found when trying to get lock; try restarting transaction') <br>
> (Background on this error at: <a href="http://sqlalche.me/e/2j85" rel="noreferrer noreferrer noreferrer" target="_blank">http://sqlalche.me/e/2j85</a>)<br>
> 2018-12-13 11:48:46.016 89597 ERROR heat.engine.resource<br>
> 2018-12-13 11:48:46.030 89597 INFO heat.engine.stack <br>
> [req-9a43184f-77d8-4fad-ab9e-2b9826c10b70 - admin - default default] <br>
> Stack DELETE FAILED <br>
> (swarm-clustergp27-ebhsalhb4bop-swarm_primary_master-tzgkh3ncmymw): <br>
> Resource DELETE failed: resources[0]: (pymysql.err.InternalError) (1213, <br>
> u'Deadlock found when trying to get lock; try restarting transaction') <br>
> (Background on this error at: <a href="http://sqlalche.me/e/2j85" rel="noreferrer noreferrer noreferrer" target="_blank">http://sqlalche.me/e/2j85</a>)<br>
> 2018-12-13 11:48:46.844 89595 INFO heat.engine.resource <br>
> [req-9a43184f-77d8-4fad-ab9e-2b9826c10b70 - admin - default default] <br>
> DELETE: ResourceGroup "swarm_primary_master" <br>
> [6984db3c-3ac1-4afc-901f-21b3e7f230a7] Stack <br>
> "swarm-clustergp27-ebhsalhb4bop" [b43256fa-52e2-4613-ac15-63fd9340a8be]<br>
> <br>
> <br>
> I read this issue was solved in heat version 10 but seems not.<br>
<br>
The patch for bug 1732969, which is in Queens, is probably the fix <br>
you're referring to: <a href="https://review.openstack.org/#/c/521170/1" rel="noreferrer noreferrer noreferrer" target="_blank">https://review.openstack.org/#/c/521170/1</a><br>
<br>
The traceback in that bug included the SQL statement that was failing. <br>
I'm not sure if that isn't included in your traceback because SQLAlchemy <br>
didn't report it, or if it's because that traceback is actually from the <br>
parent stack. If you have a traceback from the original failure in the <br>
child stack that would be useful. If there's a way to turn on more <br>
detailed reporting of errors in SQLAlchemy that would also be useful.<br>
<br>
Since this is a delete, it's possible that we need a retry-on-deadlock <br>
on the resource_delete() function also (though resource_update() is <br>
actually used more during a delete to update the status).<br>
<br>
- ZB<br>
<br>
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