Percona cluster failure

Hi,

I have strange problem. Trying to change password for root user I suddenly lost connection to mysql on node and wasn’t able to start mysql again. When I’m trying to run mysql here what I got in error log:

2014-01-29 14:37:37 11198 [Note] /usr/sbin/mysqld: ready for connections.
Version: ‘5.6.15-56’ socket: ‘/var/lib/mysql/mysql.sock’ port: 3306 Percona XtraDB Cluster (GPL), Release 25.2, Revision 692, wsrep_25.2.r4034
14:37:58 UTC - mysqld got signal 8 ;
This could be because you hit a bug. It is also possible that this binary
or one of the libraries it was linked against is corrupt, improperly built,
or misconfigured. This error can also be caused by malfunctioning hardware.
We will try our best to scrape up some info that will hopefully help
diagnose the problem, but since we have already crashed,
something is definitely wrong and this may fail.
Please help us make Percona XtraDB Cluster better by reporting any
bugs at https://bugs.launchpad.net/percona-xtradb-cluster

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=3
max_threads=153
thread_count=3
connection_count=3
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 69222 K bytes of memory
Hope that’s ok; if not, decrease some variables in the equation.

Thread pointer: 0x68bd150
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong…
stack_bottom = 7f32a41efd28 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x35)[0x901e65]
/usr/sbin/mysqld(handle_fatal_signal+0x4c4)[0x67fc34]
/lib64/libpthread.so.0(+0xfae0)[0x7f32a8a6aae0]
/usr/sbin/mysqld[0x69bdb5]
/usr/sbin/mysqld[0x69c398]
/usr/sbin/mysqld[0x69c6a6]
/usr/sbin/mysqld[0x6911d9]
/usr/sbin/mysqld[0x691504]
/usr/sbin/mysqld(_Z16acl_authenticateP3THDj+0x1e4)[0x69c8f4]
/usr/sbin/mysqld[0x6d2eb2]
/usr/sbin/mysqld(_Z16login_connectionP3THD+0x4d)[0x6d30cd]
/usr/sbin/mysqld(_Z22thd_prepare_connectionP3THD+0x24)[0x6d32c4]
/usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x152)[0x6d42e2]
/usr/sbin/mysqld(handle_one_connection+0x47)[0x6d44e7]
/usr/sbin/mysqld(pfs_spawn_thread+0x12a)[0xb3b63a]
/lib64/libpthread.so.0(+0x7ddb)[0x7f32a8a62ddb]
/lib64/libc.so.6(clone+0x6d)[0x7f32a71a0a1d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0): is an invalid pointer
Connection ID (thread ID): 3
Status: NOT_KILLED

You may download the Percona XtraDB Cluster operations manual by visiting
http://www.percona.com/software/percona-xtradb-cluster/. You may find information

Here my.cnf:

[mysqld]

datadir=/var/lib/mysql
user=mysql

Path to Galera library

wsrep_provider=/usr/lib64/libgalera_smm.so

Cluster connection URL contains the IPs of node#1, node#2

wsrep_cluster_address=gcomm://10.1.7.59,10.1.8.242

In order for Galera to work correctly binlog format should be ROW

binlog_format=ROW

MyISAM storage engine has only experimental support

default_storage_engine=InnoDB

This is a recommended tuning variable for performance

innodb_locks_unsafe_for_binlog=1

#InnoDb buffer pool size
innodb_buffer_pool_size=2G

This changes how InnoDB autoincrement locks are managed and is a requirement for Galera

innodb_autoinc_lock_mode=2

Node #1 address

wsrep_node_address=10.1.7.59

SST method

wsrep_sst_method=xtrabackup

Cluster name

wsrep_cluster_name=percona_cluster

Authentication for SST method

wsrep_sst_auth=“sstuser:s3cret”

[mysql]
prompt=\u@\h [\d]>\_

Solved. Just had to run “mysql_upgrade” before doing all account related stuff.