Percona Discussion Google Group

Re: [percona-group] xtrabackup SST failing with character set utf8mb4

alexey.kopy...@percona.com (Alexey Kopytov) — Fri, 24 May 2013 05:35:15 UT

Hi doug,

It appears to be a DBD::mysql issue in old Ubuntu distributions. In
Ubuntu 10.04 DBD::mysql is linked against libmysqlclient16, i.e. the 5.1
client library. However, utf8mb4 is only supported in 5.5, which means
any DBD::MySQL utility on Ubuntu 10.04 is unable to connect to 5.5

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

stew...@flamingspork.com (Stewart Smith) — Thu, 23 May 2013 00:37:49 UT

There's been a couple of interesting things here:
1) We had a bug late in the cycle with testing against current PXC which
went unnoticed, which is how bug #1180672 sneaked in. We've fixed
this problem and we're trying to come up with better was (both human
and machine) to ensure this doesn't happen again.

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

stew...@flamingspork.com (Stewart Smith) — Thu, 23 May 2013 00:17:23 UT

It's pretty hard to un-intentionally get an old release - the download
page will have giant warnings about downloading something that isn't the
latest. Many releases have bugs that are critical/high priority for some
segment of people so I personally prefer to keep things up, at least for
completeness than to remove them (as otherwise there's an argument to

xtrabackup SST failing with character set utf8mb4

d...@pagerduty.com — Thu, 23 May 2013 22:16:47 UT

Hi,
I'm setting up a new XtraDB cluster and I'm running into an issue with
xtrabackup based SST. I'm receiving an error that the utf8mb4 character set
that we need is not valid. I'm able to log into the MySQL console and set
this character set using "SET NAMES utf8mb4" so I know it's valid. Also, I

Xtradb cluster question related to networking restart

ajke...@gmail.com (Amol) — Thu, 23 May 2013 16:23:35 UT

This morning i received an email from our cloud providers that they would
be resetting the network to all our servers and since we have some servers
running xtradb cluster, i have a few questions for this group
1. what will happen if all the nodes loose network connectivity for
(minimum 20secs, max 10 mins)?

Re: [percona-group] increased TPS dramatically for concurrency hot rows updating by x210 time with 2000 concurrency updating

hickey....@gmail.com (hickey) — Thu, 23 May 2013 03:38:50 UT

Looking forward your comments:)
Incidentally, war are still evaluating it for one of the core app in
Alibaba.

When Cached Row is used in TableSyncNibble::__get_boundaries

vishalc...@gmail.com (Vishal Kumar) — Wed, 22 May 2013 23:26:03 UT

Hi,
It is not clear when following code of __get_boundaries will be true :
if ( $self->{cached_row} && $self->{cached_nibble} == $self->{nibble} ) {
If syncer object holds this condition, prior condition if ( $self->{cached_boundaries} )
must also hold true. cached_boundaries is cleared when nibble advances.

Re: [percona-group] increased TPS dramatically for concurrency hot rows updating by x210 time with 2000 concurrency updating

laurynas.bivei...@percona.com (Laurynas Biveinis) — Wed, 22 May 2013 10:26:39 UT

Hello -

It's an interesting idea. We will try to review your patch and get back to you.

Thanks,
--
Laurynas
[link]

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

lolo...@gmail.com (Laurent MINOST) — Wed, 22 May 2013 09:51:57 UT

Totally agree on Sanket's opinion and moreover I think that :
non-regression tests and release cycle should be IMO strongly reviewed on
Percona's side to avoid such problems and above all to show a better
outside image of the company ...
This is only from my point of view but with all the problems we know from

Re: Percona XtraDB Cluster 5.5.30-23.7.4 SST Problem

lolo...@gmail.com (Laurent MINOST) — Wed, 22 May 2013 09:34:07 UT

Hi Sanket,

Yes I can also confirm there is a big problem with Percona Xtrabackup
2.1.2, I was in the process of testing the new release this morning on a
test cluster but failed everything when testing it because of this SST hang
and finally saw the problem by coming to the group here, so as the bug has

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

sanket.gu...@gmail.com (Sanket Gupta) — Wed, 22 May 2013 09:22:45 UT

I am not sure how packaging \releases work but should we not unpublish this
release as this is a important bug that can cause major issues
I personally wasted 5 hours getting this to work and then finally did a
downgrade to 2.0.7

On Wed, May 22, 2013 at 2:34 PM, Raghavendra D Prabhu <

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

raghavendra.pra...@percona.com (Raghavendra D Prabhu) — Wed, 22 May 2013 09:04:07 UT

Hi,

Yes, it has been confirmed now and the bug has been identified.
So, before upgrade from 2.0.x wait for XB 2.1.3 (which may be
released soon because of this critical bug), or if already on XB 2.1.2, downgrade (till
XB 2.1.3 is released).

Regards,
--
Raghavendra Prabhu
Percona LLC. - [link] / Blog: [link]

Re: Percona XtraDB Cluster 5.5.30-23.7.4 SST Problem

sanket.gu...@gmail.com (Sanket Gupta) — Wed, 22 May 2013 07:33:24 UT

Hi
I was facing a similar problem where the innobackup.backup.log was stuck at
innobackup.backup.log on donor (db3)
______________________________ ______________________________ _____________________-
InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Ireland Ltd 2009-2012. All Rights Reserved.

Re: xtrabackup SST issue on one node

jervin.r...@percona.com (Jervin R) — Wed, 22 May 2013 07:30:49 UT

Yes, reported just today
[link]

Re: [percona-group] Regression with Xtrabackup affecting PXC SST

jervin.r...@percona.com (Jervin R) — Wed, 22 May 2013 07:30:21 UT

So there is another one - do not upgrade to 2.1.2 yet -
[link]