Running conflicting multi-master load at MGC 10 cluster will soon result in assert like this:
140319 17:58:40 [Note] WSREP: BF kill (1, seqno: 531598), victim: (6132) trx: 248136197
140319 17:58:40 [Note] WSREP: Aborting query: COMMIT
140319 17:58:40 [Note] WSREP: kill query for: 6132
140319 17:58:40 [Note] WSREP: kill trx QUERY_COMMITTING for 248136197
140319 17:58:40 [Note] WSREP: commit failed for reason: 3
140319 17:58:40 [ERROR] WSREP: invalid state ROLLED_BACK (FATAL)
140319 17:58:40 [ERROR] WSREP: cancel commit bad exit: 7 248136197
140319 17:58:40 [ERROR] mysqld got signal 6 ;
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.
To report this bug, see http://kb.askmonty.org/en/reporting-bugs
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.
Server version: 10.0.7-MariaDB-wsrep
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 2368169 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x0x7f2975c12008
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
stack_bottom = 0x7f29f387f9c8 thread_stack 0x48000
handler/ha_innodb.cc:16814(wsrep_innobase_kill_one_trx(void*, trx_t const*, trx_t*, unsigned long))[0x88542d]
lock/lock0lock.cc:6784(lock_clust_rec_read_check_and_lock(unsigned long, buf_block_t const*, unsigned char const*, dict_index_t*, unsigned long const*, lock_mode, unsigned long, que_thr_t*))[0x8b0bf0]
How to reproduce:
1. setup two node MGC 10 cluster
2. run SQL load with writes on some hot-spot table, load balanced to both nodes.