This bug was fixed in the package systemd - 229-6ubuntu1
---------------
systemd (229-6ubuntu1) yakkety; urgency=medium
* Merge with Debian unstable. Remaining Ubuntu changes:
- Hack to support system-image read-only /etc, and modify files in
/etc/writable/ instead.
systemd (229-6) unstable; urgency=medium
* systemd-container: Prefer renamed "btrfs-progs" package name over
"btrfs-tools". (Closes: #822629)
* systemd-container: Recommend libnss-mymachines. (Closes: #822615)
* Drop systemd-dbg, in favor of debhelpers' automatic -dbgsym packages.
* Drop Add-targets-for-compatibility-with-Debian-insserv-sy.patch; we don't
need $x-display-manager any more as most/all DMs ship native services, and
$mail-transport-agent is not widely used (not even by our default MTA
exim4).
* Unify our two patches for Debian specific configuration files.
* Drop udev-re-enable-mount-propagation-for-udevd.patch, i. e. run udevd in
its own slave mount name space again. laptop-mode-tools 1.68 fixed the
original bug (#762018), thus add a Breaks: to earlier versions.
* Ship fbdev-blacklist.conf in /lib/modprobe.d/ instead of /etc/modprobe.d/;
remove the conffile on upgrades.
* Replace util-Add-hidden-suffixes-for-ucf.patch with patch that got
committed upstream.
* Replace Stop-syslog.socket-when-entering-emergency-mode.patch with patch
that got committed upstream.
* debian/udev.README.Debian: Adjust documentation of MAC based naming for
USB network cards to the udev rule, where this was moved to in 229-5.
* debian/extra/init-functions.d/40-systemd: Invoke status command with
--no-pager, to avoid blocking scripts that call an init.d script with
"status" with an unexpected pager process. (Closes: #765175, LP: #1576409)
* Add debian/extra/rules/70-debian-uaccess.rules: Make FIDO U2F dongles
accessible to the user session. This avoids having to install libu2f-host0
(which isn't discoverable at all) to make those devices work.
(LP: #1387908)
* libnss-resolve: Enable systemd-resolved.service on package installation,
as this package makes little sense without resolved.
* Add a DHCP exit hook for pushing received NTP servers into timesyncd.
(LP: #1578663)
* debian/udev.postinst: Fix migration check from the old persistent-net
generator to not apply to chroots. (Closes: #813141)
* Revert "enable TasksMax= for all services by default, and set it to 512".
Introducing a default limit on number of threads broke a lot of software
which regularly needs more, such as MySQL and RabbitMQ, or services that
spawn off an indefinite number of subtasks that are not in a scope, like
LXC or cron. 512 is way too much for most "simple" services, and it's way
too little for the ones mentioned above. Effective (and much stricter)
limits should instead be put into units individually.
(Closes: #823530, LP: #1578080)
* Split out udev rule to name USB network interfaces by MAC address into
73-usb-net-by-mac.rules, so that it's easier to disable. (Closes: #824025)
* 73-usb-net-by-mac.rules: Disable when net.ifnames=0 is specified on the
kernel command line, to be consistent with disabling the *.link files.
* 73-special-net-names.rule: Name the IBM integrated management module
virtual USB network card "ibmimm". Thanks Marco d'Itri!
-- Martin Pitt <martin.p...@ubuntu.com> Thu, 12 May 2016 10:30:59
+0200
** Changed in: systemd (Ubuntu)
Status: Fix Committed => Fix Released
--
You received this bug notification because you are a member of नेपाली
भाषा समायोजकहरुको समूह, which is subscribed to Xenial.
Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1578080
Title:
percona cluster hits resource limits in HA Openstack cloud with xenial
Status in percona-xtradb-cluster-5.6 package in Ubuntu:
Won't Fix
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Xenial:
Fix Committed
Status in percona-cluster package in Juju Charms Collection:
Won't Fix
Status in systemd package in Debian:
Confirmed
Bug description:
I'm trying to deploy Mitaka Openstack using the 16.04 charms on Xenial
using Juju 1.25.5 and MAAS 1.9.2, with as many components of Openstack
being HA as possible.
When deployed, after running for a while mysql (which is a 3 node
cluster) starts refusing connections, and erroring:
2016-05-03 01:25:28 13795 [ERROR] Error log throttle: 50
'Can't create thread to handle new connection' error(s) suppressed
When I look at systemd-cgtop, I can see it maxing out at 512
connections.
To get it going again I do a:
$ sudo systemctl edit mysql
and set:
TasksMax=infinity
Sometimes I even need to edit /etc/systemd/system.conf and bump
DefaultTasksMax to 1024 or higher, depending on long its been left
running.
I've noticed that dropping worker-multiplier setting on nova-cloud-
controller, neutron-api etc all help to reduce the load, but I still
need to bump it up.
Please let me know if you need any more information.
SRU INFORMATION
---------------
Impact: Introducing a default #thread limit of 512 broke an unknown set of
services which regularly run many threads.
Fix:
http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?id=fe4d9d3ba0
(essentially, revert the upstream commit that enabled it)
Regression potential: Very low -- this just restores the pre-228 behaviour
and does not impose any new restriction.
Test case:
- Pick some unit like cron.service or mysql.service that does not specify an
explicit TaskMax= limit.
- Check its TaskMax: systemctl show -p TasksMax cron.service
- In current xenial this is "512", after the update it should be a very big
number (maxint minus 1, which means "infinity")
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/percona-xtradb-cluster-5.6/+bug/1578080/+subscriptions
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