Comment 40 for bug 1657256

Deploying Openstack Ocata, w/ Juju on arm64 hosts, the mysql crashed with the following:

2017-09-20 21:38:39 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:38:39 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:38:39 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:38:39 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:02 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:02 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:02 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:39:02 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:20 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:20 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:20 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:39:20 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:41 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:41 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:39:41 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:39:41 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:53 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:53 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:53 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:40:53 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:56 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:56 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:56 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:40:56 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:58 17783 [Warning] 'user' entry 'root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:58 17783 [Warning] 'user' entry '@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 21:40:58 17783 [Warning] 'user' entry 'sstuser@ip6-localhost' ignored in --skip-name-resolve mode.
2017-09-20 21:40:58 17783 [Warning] 'proxies_priv' entry '@ root@juju-24a047-0-lxd-1' ignored in --skip-name-resolve mode.
2017-09-20 22:05:59 ffff583fa1e0 InnoDB: Assertion failure in thread 281472162308576 in file ut0lst.h line 271
InnoDB: Failing assertion: list.count > 0
InnoDB: We intentionally generate a memory trap.

At the time I was doing a'lot of things at once, (import images to glance, configuring neutron and trying to launch an instance via nova) However, I've redeployed at least 3 times today and have seen a crash similar to this with each deployment. I've attached the error.log

ubuntu@juju-24a047-0-lxd-1:/var/log/mysql$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial

ubuntu@juju-24a047-0-lxd-1:/var/log/mysql$ uname -a
Linux juju-24a047-0-lxd-1 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:01:34 UTC 2017 aarch64 aarch64 aarch64 GNU/Linux

ii percona-galera-3 3.19-0ubuntu0.16.04.1 arm64 Galera replication framework for Percona XtraDB Cluster
ii percona-xtrabackup 2.3.7-0ubuntu0.16.04.2 arm64 Open source backup tool for InnoDB and XtraDB
ii percona-xtradb-cluster-server-5.6 5.6.34-26.19-0ubuntu0.16.04.1 arm64 Percona XtraDB Cluster database server binaries

I was able to reproduce this on a standalone arm64 host , by installing percona-cluster and running the sysbench test. I have attached those logs as well.