Cluster setup: Three nodes in using shm for data directories. Each node was configured with wsrep_slave_threads=4.

Sqlgen load: LD_PRELOAD=/home/teemu/lib/libglb.so GLB_BIND="gw:3307" GLB_TARGETS="gw:3311 gw:3312 gw:3313" ./bin/sqlgen --user test --pswd testpass --host gw --port 3307 --users 64 --duration 600 --tables 1 --rows 100 --stat-interval 99999999 >& /dev/null

Occasionally one of the nodes crashes with error:

130321 12:09:07 [ERROR] WSREP: Trx 17411 tries to abort slave trx 17419. This could be caused by:
        1) unsupported configuration options combination, please check documentation.
        2) a bug in the code.
        3) a database corruption.
 Node consistency compromized, need to abort. Restart the node to resync with cluster.

Aborting thread (seqno 17411):

Thread 1 (Thread 0x7f2c47964700 (LWP 31640)):
#0  __pthread_kill (threadid=<optimized out>, signo=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/pthread_kill.c:63
#1  0x00000000006a2359 in handle_fatal_signal (sig=6)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/signal_handler.cc:247
#2  <signal handler called>
#3  0x00007f2c6438f425 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#4  0x00007f2c64392b8b in __GI_abort () at abort.c:91
#5  0x00000000007ee1e8 in wsrep_abort_slave_trx (bf_seqno=<optimized out>, victim_seqno=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/handler/ha_innodb.cc:12248
#6  0x00000000007eeed4 in wsrep_innobase_kill_one_trx (bf_thd_ptr=<optimized out>, bf_trx=<optimized out>, 
    victim_trx=0x7f2c2800e7e8, signal=1)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/handler/ha_innodb.cc:12402
#7  0x00000000008c41d3 in lock_rec_other_has_conflicting (mode=<optimized out>, block=<optimized out>, 
    heap_no=<optimized out>, trx=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/lock/lock0lock.c:1611
#8  0x00000000008c8ced in lock_rec_convert_impl_to_expl (block=<optimized out>, 
    rec=0x7f2c626f6a42 "\032\020Yf\006D\346?\200", index=0x7f2c2000c2e8, offsets=0x7f2c4795eb00)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/lock/lock0lock.c:5669
#9  0x00000000008c9cc5 in lock_sec_rec_read_check_and_lock (flags=<optimized out>, block=0x7f2c61e1ae00, 
    rec=0x7f2c626f6a42 "\032\020Yf\006D\346?\200", index=0x7f2c2000c2e8, offsets=<optimized out>, mode=LOCK_X, gap_mode=0, 
    thr=0x7f2c24035d00) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/lock/lock0lock.c:5877
#10 0x00000000005049f1 in row_ins_set_exclusive_rec_lock (type=<optimized out>, block=<optimized out>, rec=<optimized out>, 
    index=<optimized out>, offsets=<optimized out>, thr=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:1203
#11 0x0000000000505119 in row_ins_scan_sec_index_for_duplicate (index=0x7f2c2000c2e8, entry=0x7f2bc01a3f58, 
    thr=0x7f2c24035d00) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:1752
#12 0x00000000008f8139 in row_ins_index_entry_low (mode=2, index=0x7f2c2000c2e8, entry=0x7f2bc01a3f58, thr=0x7f2c24035d00, 
    n_ext=0) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:2102
#13 0x00000000008fbcce in row_ins_index_entry (thr=0x7f2c24035d00, entry=<optimized out>, index=0x7f2c2000c2e8, 
    n_ext=<optimized out>, foreign=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:2301
#14 row_ins_index_entry_step (thr=0x7f2c24035d00, node=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:2389
#15 row_ins (thr=<optimized out>, node=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:2521
#16 row_ins_step (thr=0x7f2c24035d00)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0ins.c:2638
#17 0x00000000008007de in row_insert_for_mysql (mysql_rec=<optimized out>, prebuilt=0x7f2c24034ea8)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0mysql.c:1245
#18 0x00000000007e905a in ha_innobase::write_row (this=0x7f2c240558d0, record=0x7f2c240426c0 "\341\027")
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/handler/ha_innodb.cc:5619
#19 0x00000000006a9d58 in handler::ha_write_row (this=0x7f2c240558d0, buf=0x7f2c240426c0 "\341\027")
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/handler.cc:5257
#20 0x000000000074ddf9 in Rows_log_event::write_row (this=0x7f2bc01f7a20, rli=0x7f2bc01f3900, overwrite=false)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:9242
#21 0x000000000074e188 in Write_rows_log_event::do_exec_row (this=0x7f2bc01f7a20, rli=0x7f2bc01f3900)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:9413
#22 0x0000000000744914 in Rows_log_event::do_apply_event (this=0x7f2bc01f7a20, rli=0x7f2bc01f3900)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:8054
#23 0x000000000058b3be in apply_event (rli=<optimized out>, this=0x7f2bc01f7a20)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.h:1139
#24 wsrep_apply_rbr (thd=0x4f71fc0, rbr_buf=<optimized out>, buf_len=0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:7900
#25 0x0000000000591dc7 in wsrep_apply_cb (ctx=0x4f71fc0, buf=0x7f2bc02c904b, buf_len=167, global_seqno=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:7979
#26 0x00007f2c5657d46f in apply_wscoll (trx=..., apply_cb=0x591d40 <wsrep_apply_cb(void*, void const*, unsigned long, long)>, 
    recv_ctx=0x4f71fc0) at galera/src/replicator_smm.cpp:41
#27 apply_trx_ws (recv_ctx=0x4f71fc0, apply_cb=0x591d40 <wsrep_apply_cb(void*, void const*, unsigned long, long)>, 
    commit_cb=0x59d1f0 <wsrep_commit_cb(void*, long, bool)>, trx=...) at galera/src/replicator_smm.cpp:83
#28 0x00007f2c5658203f in galera::ReplicatorSMM::replay_trx (this=0x35caad0, trx=0x7f2bc02ee5d0, trx_ctx=0x4f71fc0)
    at galera/src/replicator_smm.cpp:821
#29 0x00007f2c56599bd6 in galera_replay_trx (gh=<optimized out>, trx_handle=<optimized out>, recv_ctx=0x4f71fc0)
    at galera/src/wsrep_provider.cpp:661
#30 0x000000000058df1c in wsrep_replay_transaction (thd=0x4f71fc0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:5975
#31 0x000000000059a898 in wsrep_mysql_parse (thd=0x4f71fc0, rawbuf=0x7f2bc0186550 "COMMIT", length=6, 
    parser_state=0x7f2c47963210) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:6050
#32 0x000000000059bff7 in dispatch_command (command=COM_QUERY, thd=0x4f71fc0, packet=<optimized out>, 
    packet_length=1201025784) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:1212
#33 0x000000000059c60d in do_command (thd=0x4f71fc0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:869
#34 0x000000000063eb95 in do_handle_one_connection (thd_arg=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_connect.cc:878
#35 0x000000000063edac in handle_one_connection (arg=0x4f71fc0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_connect.cc:790
#36 0x00007f2c6471fe9a in start_thread (arg=0x7f2c47964700) at pthread_create.c:308
#37 0x00007f2c6444ccbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#38 0x0000000000000000 in ?? ()

Victim thread (seqno 17419):

#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00000000008e2741 in os_cond_wait (mutex=0x306a7e0, cond=0x306a818)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2  os_event_wait_low (event=0x306a7e0, reset_sig_count=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3  0x00000000008215b7 in sync_array_wait_event (arr=0x3022530, index=1)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/sync/sync0arr.c:458
#4  0x0000000000823006 in mutex_spin_wait (mutex=0x306a788, 
    file_name=0xacde88 "/home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/srv/srv0srv.c", line=1793)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/sync/sync0sync.c:643
#5  0x000000000081a7aa in mutex_enter_func (line=1793, 
    file_name=0xacde88 "/home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/srv/srv0srv.c", 
    mutex=0x306a788) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/include/sync0sync.ic:222
#6  pfs_mutex_enter_func (line=1793, 
    file_name=0xacde88 "/home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/srv/srv0srv.c", 
    mutex=0x306a788) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/include/sync0sync.ic:251
#7  srv_suspend_mysql_thread (thr=0x7f2c1400a100)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/srv/srv0srv.c:1793
#8  0x00000000007ff8a8 in row_mysql_handle_errors (new_err=0x7f2c604b0020, trx=0x7f2c2800e7e8, thr=<optimized out>, 
    savept=<optimized out>) at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0mysql.c:598
#9  0x000000000080081a in row_insert_for_mysql (mysql_rec=<optimized out>, prebuilt=0x7f2c140092a8)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/row/row0mysql.c:1254
#10 0x00000000007e905a in ha_innobase::write_row (this=0x7f2c14016e90, record=0x7f2c1400b9f0 "\341\033")
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/storage/innobase/handler/ha_innodb.cc:5619
#11 0x00000000006a9d58 in handler::ha_write_row (this=0x7f2c14016e90, buf=0x7f2c1400b9f0 "\341\033")
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/handler.cc:5257
#12 0x000000000074ddf9 in Rows_log_event::write_row (this=0x7f2c280606b0, rli=0x7f2c2800b060, overwrite=false)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:9242
#13 0x000000000074e188 in Write_rows_log_event::do_exec_row (this=0x7f2c280606b0, rli=0x7f2c2800b060)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:9413
#14 0x0000000000744914 in Rows_log_event::do_apply_event (this=0x7f2c280606b0, rli=0x7f2c2800b060)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.cc:8054
#15 0x000000000058b3be in apply_event (rli=<optimized out>, this=0x7f2c280606b0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/log_event.h:1139
#16 wsrep_apply_rbr (thd=0x7f2c28000990, rbr_buf=<optimized out>, buf_len=0)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:7900
#17 0x0000000000591dc7 in wsrep_apply_cb (ctx=0x7f2c28000990, buf=0x7f2c4890c635, buf_len=167, global_seqno=<optimized out>)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:7979
#18 0x00007f2c5657d46f in apply_wscoll (trx=..., apply_cb=0x591d40 <wsrep_apply_cb(void*, void const*, unsigned long, long)>, 
    recv_ctx=0x7f2c28000990) at galera/src/replicator_smm.cpp:41
#19 apply_trx_ws (recv_ctx=0x7f2c28000990, apply_cb=0x591d40 <wsrep_apply_cb(void*, void const*, unsigned long, long)>, 
    commit_cb=0x59d1f0 <wsrep_commit_cb(void*, long, bool)>, trx=...) at galera/src/replicator_smm.cpp:83
#20 0x00007f2c56583060 in galera::ReplicatorSMM::apply_trx (this=<optimized out>, recv_ctx=0x7f2c28000990, trx=0x7f2c28061110)
    at galera/src/replicator_smm.cpp:470
#21 0x00007f2c56583830 in galera::ReplicatorSMM::process_trx (this=0x35caad0, recv_ctx=0x7f2c28000990, trx=0x7f2c28061110)
    at galera/src/replicator_smm.cpp:1058
#22 0x00007f2c565607c4 in galera::GcsActionSource::dispatch (this=0x35cb058, recv_ctx=0x7f2c28000990, act=...)
    at galera/src/gcs_action_source.cpp:111
#23 0x00007f2c56561393 in galera::GcsActionSource::process (this=0x35cb058, recv_ctx=0x7f2c28000990)
    at galera/src/gcs_action_source.cpp:169
#24 0x00007f2c5658536d in async_recv (recv_ctx=0x7f2c28000990, this=0x35caad0) at galera/src/replicator_smm.cpp:375
#25 galera::ReplicatorSMM::async_recv (this=0x35caad0, recv_ctx=0x7f2c28000990) at galera/src/replicator_smm.cpp:356
#26 0x00007f2c56598d0e in galera_recv (gh=<optimized out>, recv_ctx=<optimized out>) at galera/src/wsrep_provider.cpp:201
#27 0x00000000005920aa in wsrep_replication_process (thd=0x7f2c28000990)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/sql_parse.cc:8132
#28 0x00000000005184de in start_wsrep_THD (arg=0x592060)
    at /home/teemu/codership/galera/bzr/codership-mysql/5.5-23/sql/mysqld.cc:4416
#29 0x00007f2c6471fe9a in start_thread (arg=0x7f2c604b4700) at pthread_create.c:308
#30 0x00007f2c6444ccbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#31 0x0000000000000000 in ?? ()