Percona XtraDB upstream memcache bug fix

[Chris Tomlinson]

Hi

We have recently put a Percona cluster into production and have been experiencing some nasty mysqld crashes on multiple XtraDB nodes which we have identified are probably caused by a bug that was fixed in Oracle MySQL 5.6.16 last year.

http://bugs.mysql.com/bug.php?id=69993

We can't see any 5.6.16 version of XtraDB cluster to upgrade to so I am wondering how these issues are usually addressed. Should I raise a separate bug against XtraDB cluster or would that be a waste of time since you're already planning to integrate the patch into the next bug fix release?

Thanks,
Chris

[Raghavendra D Prabhu]

Hi Chris,

Looks like it has been fixed in 5.6.16 upstream. So, PS, and with that next PXC
release should have it. https://launchpad.net/percona-xtradb-cluster/+milestone/5.6.19-25.6 is the next planned release.

>Thanks,
>Chris
>
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[Jay Janssen]

Please realize that memcached support is not handled in PXC:

https://bugs.launchpad.net/percona-xtradb-cluster/+bug/1254126

There may be some limited uses for it (like read-only), but it doesn’t “just work” unfortunately.   

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[Chris Tomlinson]

Thanks for the replies.

As per my comment on that bug, we don't see any problems with the way we use it (read and write), apart from the upstream bug fixed in 5.6.16.

On Monday, 23 June 2014 16:49:53 UTC+1, Jay Janssen wrote:

Please realize that memcached support is not handled in PXC:

https://bugs.launchpad.net/percona-xtradb-cluster/+bug/1254126

There may be some limited uses for it (like read-only), but it doesn’t “just work” unfortunately.   

On Jun 23, 2014, at 5:58 AM, Chris Tomlinson <luck...@musites.com> wrote:

Hi

We have recently put a Percona cluster into production and have been experiencing some nasty mysqld crashes on multiple XtraDB nodes which we have identified are probably caused by a bug that was fixed in Oracle MySQL 5.6.16 last year.

http://bugs.mysql.com/bug.php?id=69993

We can't see any 5.6.16 version of XtraDB cluster to upgrade to so I am wondering how these issues are usually addressed. Should I raise a separate bug against XtraDB cluster or would that be a waste of time since you're already planning to integrate the patch into the next bug fix release?

Thanks,
Chris

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[Jay Janssen]

That’s interesting, I’ll need to revisit the feature and see if something changed from before.

On Jun 24, 2014, at 5:08 AM, Chris Tomlinson <luck...@musites.com> wrote:

As per my comment on that bug, we don't see any problems with the way we use it (read and write), apart from the upstream bug fixed in 5.6.16.