Modified mysqladmin password command to prevent node crash

ALTER USER USER() IDENTIFIED BY 'the infinite improbability drive';

09:10:16 UTC - mysqld got signal 11 ;
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.
Attempting to collect some information that could help diagnose the problem.
As this is a crash and something is definitely wrong, the information
collection process might fail.
Please help us make Percona XtraDB Cluster better by reporting any
bugs at https://jira.percona.com/projects/PXC/issues

key_buffer_size=8388608
read_buffer_size=131072
max_used_connections=0
max_threads=152
thread_count=3
connection_count=0
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 68412 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f54100008c0
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 = 7f545def5eb8 thread_stack 0x30000
mysqld(my_print_stacktrace+0x2c)[0xed82fc]
mysqld(handle_fatal_signal+0x479)[0x7a8609]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xf890)[0x7f5478212890]
mysqld(_Z21mysql_execute_commandP3THDb+0x3c3d)[0xc94d8d]
mysqld(_Z11mysql_parseP3THDP12Parser_stateb+0x4b5)[0xc987f5]
mysqld(_ZN15Query_log_event14do_apply_eventEPK14Relay_log_infoPKcm+0xb17)[0xe41a37]
mysqld(_ZN9Log_event11apply_eventEP14Relay_log_info+0x61)[0xe3fad1]
mysqld(_Z14wsrep_apply_cbPvPKvmjPK14wsrep_trx_meta+0x3d2)[0x7c1ba2]
/usr/lib/galera3/libgalera_smm.so(_ZNK6galera9TrxHandle5applyEPvPF15wsrep_cb_statusS1_PKvmjPK14wsrep_trx_metaERS6_+0xcc)[0x7f546aecf9cc]
/usr/lib/galera3/libgalera_smm.so(+0x2197a4)[0x7f546af157a4]
/usr/lib/galera3/libgalera_smm.so(_ZN6galera13ReplicatorSMM9apply_trxEPvPNS_9TrxHandleE+0x180)[0x7f546af183a0]
/usr/lib/galera3/libgalera_smm.so(_ZN6galera13ReplicatorSMM11process_trxEPvPNS_9TrxHandleE+0x11e)[0x7f546af1bc7e]
/usr/lib/galera3/libgalera_smm.so(_ZN6galera15GcsActionSource8dispatchEPvRK10gcs_actionRb+0x1b0)[0x7f546aef4410]
/usr/lib/galera3/libgalera_smm.so(_ZN6galera15GcsActionSource7processEPvRb+0x6a)[0x7f546aef5c1a]
/usr/lib/galera3/libgalera_smm.so(_ZN6galera13ReplicatorSMM10async_recvEPv+0x7b)[0x7f546af1c47b]
/usr/lib/galera3/libgalera_smm.so(galera_recv+0x1d)[0x7f546af3100d]
mysqld[0x7c33eb]
mysqld(start_wsrep_THD+0x1ef)[0x79965f]
mysqld(pfs_spawn_thread+0x1b4)[0xef03e4]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8064)[0x7f547820b064]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f547624a62d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7f54100134e3): alter user user() identified by 'the infinite improbability drive'
Connection ID (thread ID): 4
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
in the manual which will help you identify the cause of the crash.