SET GLOBAL wsrep_provider='none'; locks the node

meaning:
1) current client connection becomes unresponsive
2) no new connections to server can be made

branch 5.5-23, revision 3852

Error log stops at:

130301 0:59:33 [Note] WSREP: applier thread exiting (code:5)
130301 0:59:35 [Note] WSREP: rollbacker thread exiting

Stack trace (relevant threads must be 18 and 2, thread 1 hangs accepting a new connection):

Thread 19 (Thread 0x7f92bcb8b700 (LWP 31334)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x00007f92b7529dbe in wait (cond=..., this=<optimized out>) at galerautils/src/gu_lock.hpp:56
#2 galera::ServiceThd::thd_func (arg=0x25fb7d0) at galera/src/galera_service_thd.cpp:25
#3 0x00007f92bcf52e9a in start_thread (arg=0x7f92bcb8b700) at pthread_create.c:308
#4 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5 0x0000000000000000 in ?? ()

Thread 18 (Thread 0x7f92b024a700 (LWP 31345)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x00000000005204cf in inline_mysql_cond_wait (src_line=2335, that=0x103f3c0 <COND_thread_cache>, mutex=<optimized out>, src_file=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/include/mysql/psi/mysql_thread.h:980
#2 cache_thread () at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:2335
#3 one_thread_per_connection_end (thd=<optimized out>, put_in_cache=true) at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:2400
#4 0x000000000052013d in start_wsrep_THD (arg=0x597120 <wsrep_rollback_process(THD*)>) at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:4432
#5 0x00007f92bcf52e9a in start_thread (arg=0x7f92b024a700) at pthread_create.c:308
#6 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7 0x0000000000000000 in ?? ()

Thread 17 (Thread 0x7f925fbd0700 (LWP 31347)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f290, cond=0x391f2c8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f290, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=0, message1=message1@entry=0x7f925fbcfe20, message2=message2@entry=0x7f925fbcfe30,
    type=type@entry=0x7f925fbcfe40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925fbd0700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 16 (Thread 0x7f925f3cf700 (LWP 31348)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f310, cond=0x391f348) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f310, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=1, message1=message1@entry=0x7f925f3cee20, message2=message2@entry=0x7f925f3cee30,
    type=type@entry=0x7f925f3cee40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=1) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925f3cf700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 15 (Thread 0x7f925ebce700 (LWP 31349)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f390, cond=0x391f3c8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f390, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=2, message1=message1@entry=0x7f925ebcde20, message2=message2@entry=0x7f925ebcde30,
    type=type@entry=0x7f925ebcde40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=2) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925ebce700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
---Type <return> to continue, or q <return> to quit---
#8 0x0000000000000000 in ?? ()

Thread 14 (Thread 0x7f925e3cd700 (LWP 31350)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f410, cond=0x391f448) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f410, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=3, message1=message1@entry=0x7f925e3cce20, message2=message2@entry=0x7f925e3cce30,
    type=type@entry=0x7f925e3cce40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=3) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925e3cd700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 13 (Thread 0x7f925dbcc700 (LWP 31351)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f490, cond=0x391f4c8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f490, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=4, message1=message1@entry=0x7f925dbcbe20, message2=message2@entry=0x7f925dbcbe30,
    type=type@entry=0x7f925dbcbe40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=4) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925dbcc700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 12 (Thread 0x7f925d3cb700 (LWP 31352)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f510, cond=0x391f548) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f510, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=5, message1=message1@entry=0x7f925d3cae20, message2=message2@entry=0x7f925d3cae30,
    type=type@entry=0x7f925d3cae40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=5) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925d3cb700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 11 (Thread 0x7f925cbca700 (LWP 31353)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f590, cond=0x391f5c8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f590, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=6, message1=message1@entry=0x7f925cbc9e20, message2=message2@entry=0x7f925cbc9e30,
    type=type@entry=0x7f925cbc9e40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=6) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925cbca700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7f925c3c9700 (LWP 31354)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f610, cond=0x391f648) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f610, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
---Type <return> to continue, or q <return> to quit---
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=7, message1=message1@entry=0x7f925c3c8e20, message2=message2@entry=0x7f925c3c8e30,
    type=type@entry=0x7f925c3c8e40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=7) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925c3c9700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7f925bbc8700 (LWP 31355)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f690, cond=0x391f6c8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f690, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=8, message1=message1@entry=0x7f925bbc7e20, message2=message2@entry=0x7f925bbc7e30,
    type=type@entry=0x7f925bbc7e40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925bbc8700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7f925b3c7700 (LWP 31356)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x391f710, cond=0x391f748) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x391f710, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x000000000092b7cf in os_aio_simulated_handle (global_segment=global_segment@entry=9, message1=message1@entry=0x7f925b3c6e20, message2=message2@entry=0x7f925b3c6e30,
    type=type@entry=0x7f925b3c6e40) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0file.c:5095
#4 0x00000000008e58c4 in fil_aio_wait (segment=segment@entry=9) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/fil/fil0fil.c:4595
#5 0x000000000086a4a8 in io_handler_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0start.c:482
#6 0x00007f92bcf52e9a in start_thread (arg=0x7f925b3c7700) at pthread_create.c:308
#7 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f925a3c5700 (LWP 31358)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
#1 0x000000000092c7db in os_cond_wait_timed (abstime=0x7f925a3c4e10, mutex=0x329f820, cond=0x329f858) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:171
#2 os_event_wait_time_low (event=0x329f820, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:716
#3 0x0000000000867f28 in srv_lock_timeout_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0srv.c:2378
#4 0x00007f92bcf52e9a in start_thread (arg=0x7f925a3c5700) at pthread_create.c:308
#5 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f92592a3700 (LWP 31359)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
#1 0x000000000092c7db in os_cond_wait_timed (abstime=0x7f92592a2df0, mutex=0x329f7a0, cond=0x329f7d8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:171
#2 os_event_wait_time_low (event=0x329f7a0, time_in_usec=time_in_usec@entry=1000000, reset_sig_count=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:716
#3 0x00000000008682b3 in srv_error_monitor_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0srv.c:2580
#4 0x00007f92bcf52e9a in start_thread (arg=0x7f92592a3700) at pthread_create.c:308
#5 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f9258aa2700 (LWP 31360)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
---Type <return> to continue, or q <return> to quit---
#1 0x000000000092c7db in os_cond_wait_timed (abstime=0x7f9258aa1e60, mutex=0x329f8a0, cond=0x329f8d8) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:171
#2 os_event_wait_time_low (event=0x329f8a0, time_in_usec=time_in_usec@entry=5000000, reset_sig_count=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:716
#3 0x0000000000867c43 in srv_monitor_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0srv.c:2207
#4 0x00007f92bcf52e9a in start_thread (arg=0x7f9258aa2700) at pthread_create.c:308
#5 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f925abc6700 (LWP 31361)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x000000000092c6d1 in os_cond_wait (mutex=0x26551d0, cond=0x2655208) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:207
#2 os_event_wait_low (event=0x26551d0, reset_sig_count=<optimized out>, reset_sig_count@entry=0) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/os/os0sync.c:609
#3 0x0000000000869009 in srv_master_thread (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/storage/innobase/srv/srv0srv.c:3255
#4 0x00007f92bcf52e9a in start_thread (arg=0x7f925abc6700) at pthread_create.c:308
#5 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f92bddb2700 (LWP 31366)):
#0 do_sigwait (set=<optimized out>, sig=0x7f92bddb1da0) at ../nptl/sysdeps/unix/sysv/linux/../../../../../sysdeps/unix/sysv/linux/sigwait.c:65
#1 0x00007f92bcf5aa79 in __sigwait (set=<optimized out>, sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/../../../../../sysdeps/unix/sysv/linux/sigwait.c:100
#2 0x000000000051e11b in signal_hand (arg=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:2803
#3 0x00007f92bcf52e9a in start_thread (arg=0x7f92bddb2700) at pthread_create.c:308
#4 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f9259b01700 (LWP 31386)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1 0x0000000000522e47 in inline_mysql_cond_wait (src_line=4772, that=<optimized out>, mutex=<optimized out>, src_file=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/include/mysql/psi/mysql_thread.h:980
#2 wsrep_wait_appliers_close (thd=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:4772
#3 0x0000000000655ac8 in wsrep_stop_replication (thd=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/wsrep_mysqld.cc:648
#4 0x000000000065d257 in wsrep_provider_update (self=<optimized out>, thd=0x5206340, type=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/sql/wsrep_var.cc:239
#5 0x000000000053437d in sys_var::update (this=this@entry=0x1057ec0 <Sys_wsrep_provider>, thd=thd@entry=0x5206340, var=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/sql/set_var.cc:201
#6 0x0000000000534d71 in update (var=<optimized out>, thd=0x5206340, this=0x1057ec0 <Sys_wsrep_provider>) at /home/ayurchen/codership/mysql/5.5-23/sql/set_var.cc:190
#7 set_var::update (this=<optimized out>, thd=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/set_var.cc:671
#8 0x0000000000535549 in sql_set_variables (thd=0x5206340, var_list=0x52089f0) at /home/ayurchen/codership/mysql/5.5-23/sql/set_var.cc:575
#9 0x0000000000599081 in mysql_execute_command (thd=thd@entry=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_parse.cc:3515
#10 0x000000000059d024 in mysql_parse (thd=0x5206340, parser_state=0x7f9259b00060, length=<optimized out>, rawbuf=<optimized out>)
    at /home/ayurchen/codership/mysql/5.5-23/sql/sql_parse.cc:6190
#11 0x000000000059d373 in wsrep_mysql_parse (thd=thd@entry=0x5206340, rawbuf=0x7f922c006900 "set global wsrep_provider='none'", length=32, parser_state=parser_state@entry=0x7f9259b00060)
    at /home/ayurchen/codership/mysql/5.5-23/sql/sql_parse.cc:6096
#12 0x000000000059f2d3 in dispatch_command (command=<optimized out>, command@entry=COM_QUERY, thd=thd@entry=0x5206340, packet=packet@entry=0x5209271 "set global wsrep_provider='none'",
    packet_length=packet_length@entry=32) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_parse.cc:1212
#13 0x000000000059f996 in do_command (thd=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_parse.cc:869
#14 0x0000000000639eb5 in do_handle_one_connection (thd_arg=thd_arg@entry=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_connect.cc:878
#15 0x0000000000639f2c in handle_one_connection (arg=0x5206340) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_connect.cc:790
#16 0x00007f92bcf52e9a in start_thread (arg=0x7f9259b01700) at pthread_create.c:308
#17 0x00007f92bcc7fcbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#18 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f92bdeb9700 (LWP 31331)):
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:132
#1 0x00007f92bcf5509b in _L_lock_1006 () from /lib/x86_64-linux-gnu/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#2 0x00007f92bcf5501c in __pthread_mutex_lock (mutex=0x103cc80 <LOCK_global_system_variables>) at pthread_mutex_lock.c:101
#3 0x000000000056c378 in inline_mysql_mutex_lock (that=0x103cc80 <LOCK_global_system_variables>, src_line=src_line@entry=1393,
    src_file=0x9da048 "/home/ayurchen/codership/mysql/5.5-23/sql/sql_class.cc") at /home/ayurchen/codership/mysql/5.5-23/include/mysql/psi/mysql_thread.h:617
#4 0x000000000057000b in THD::init (this=this@entry=0x263a580) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_class.cc:1393
#5 0x0000000000571058 in THD::THD (this=0x263a580, is_applier=<optimized out>) at /home/ayurchen/codership/mysql/5.5-23/sql/sql_class.cc:1069
#6 0x00000000005233e9 in handle_connections_sockets () at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:6043
#7 0x000000000052703f in mysqld_main (argc=48, argv=0x25952c8) at /home/ayurchen/codership/mysql/5.5-23/sql/mysqld.cc:5326
#8 0x00007f92bcbad76d in __libc_start_main (main=0x50c060 <main(int, char**)>, argc=17, ubp_av=0x7fff00637c38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
    stack_end=0x7fff00637c28) at libc-start.c:226
#9 0x000000000051c56d in _start ()