Bug#52367 - Deadlock involving SET GLOBAL EVENT_SCHEDULER = OFF during rqg_mdl_deadlock test
Full set of backtraces from gdb, linux 32-bit (nanna21).


Thread 26 (process 14625):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4ed6c, mp=0x9b4ed20, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4ed20, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=0, 
    message1=0xb7fe837c, message2=0xb7fe8378, type=0xb7fe8374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=0)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b40)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 25 (process 14626):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4edf4, mp=0x9b4eda8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4eda8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=1, 
    message1=0xae6a037c, message2=0xae6a0378, type=0xae6a0374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=1)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b44)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 24 (process 14627):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4ee7c, mp=0x9b4ee30, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4ee30, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=2, 
    message1=0xadc9f37c, message2=0xadc9f378, type=0xadc9f374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=2)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b48)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 23 (process 14628):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4ef04, mp=0x9b4eeb8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4eeb8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=3, 
    message1=0xad29e37c, message2=0xad29e378, type=0xad29e374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=3)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b4c)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 22 (process 14629):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4ef8c, mp=0x9b4ef40, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4ef40, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=4, 
    message1=0xac89d37c, message2=0xac89d378, type=0xac89d374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=4)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b50)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 21 (process 14630):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4f014, mp=0x9b4efc8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4efc8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=5, 
    message1=0xabe9c37c, message2=0xabe9c378, type=0xabe9c374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=5)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b54)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 20 (process 14631):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4f09c, mp=0x9b4f050, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4f050, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=6, 
    message1=0xab49b37c, message2=0xab49b378, type=0xab49b374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=6)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b58)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 19 (process 14632):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4f124, mp=0x9b4f0d8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4f0d8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=7, 
    message1=0xaaa9a37c, message2=0xaaa9a378, type=0xaaa9a374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=7)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b5c)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 18 (process 14633):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4f1ac, mp=0x9b4f160, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4f160, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=8, 
    message1=0xaa09937c, message2=0xaa099378, type=0xaa099374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=8)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b60)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 17 (process 14634):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9b4f234, mp=0x9b4f1e8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x9b4f1e8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x085727ee in os_aio_simulated_handle (global_segment=9, 
    message1=0xa969837c, message2=0xa9698378, type=0xa9698374)
    at mysql-5.5.4-m3/storage/innobase/os/os0file.c:4197
#5  0x0853e020 in fil_aio_wait (segment=9)
    at mysql-5.5.4-m3/storage/innobase/fil/fil0fil.c:4450
#6  0x084d6781 in io_handler_thread (arg=0x8ad6b64)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0start.c:492
#7  0x0089a45b in start_thread () from /lib/libpthread.so.0
#8  0x007f1c4e in clone () from /lib/libc.so.6

Thread 16 (process 14635):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x007eaa31 in select () from /lib/libc.so.6
#2  0x085743c8 in os_thread_sleep (tm=1000000)
    at mysql-5.5.4-m3/storage/innobase/os/os0thread.c:281
#3  0x084d4cbe in srv_lock_timeout_and_monitor_thread (arg=0x0)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0srv.c:1984
#4  0x0089a45b in start_thread () from /lib/libpthread.so.0
#5  0x007f1c4e in clone () from /lib/libc.so.6

Thread 15 (process 14636):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x007eaa31 in select () from /lib/libc.so.6
#2  0x085743c8 in os_thread_sleep (tm=1000000)
    at mysql-5.5.4-m3/storage/innobase/os/os0thread.c:281
#3  0x084d52a6 in srv_error_monitor_thread (arg=0x0)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0srv.c:2220
#4  0x0089a45b in start_thread () from /lib/libpthread.so.0
#5  0x007f1c4e in clone () from /lib/libc.so.6

Thread 14 (process 14637):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x972bff4, mp=0x972bfa8, 
    file=0x87d2408 "mysql-5.5.4-m3/storage/innobase/os/os0sync.c", line=399)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08573b9e in os_event_wait_low (event=0x972bfa8, reset_sig_count=0)
    at mysql-5.5.4-m3/storage/innobase/os/os0sync.c:399
#4  0x084d5f9b in srv_master_thread (arg=0x0)
    at mysql-5.5.4-m3/storage/innobase/srv/srv0srv.c:2740
#5  0x0089a45b in start_thread () from /lib/libpthread.so.0
#6  0x007f1c4e in clone () from /lib/libc.so.6

Thread 13 (process 14638):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x008a1f6e in do_sigwait () from /lib/libpthread.so.0
#2  0x008a200f in sigwait () from /lib/libpthread.so.0
#3  0x08144f2f in signal_hand (arg=0x0)
    at mysql-5.5.4-m3/sql/mysqld.cc:2950
#4  0x0089a45b in start_thread () from /lib/libpthread.so.0
#5  0x007f1c4e in clone () from /lib/libc.so.6

Thread 12 (process 14639):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x008a0e1b in read () from /lib/libpthread.so.0
#2  0x086851ed in vio_read (vio=0xa016860, buf=0xa03e620 "\a", size=4)
    at mysql-5.5.4-m3/vio/viosocket.c:44
#3  0x0814d3af in my_real_read (net=0x9727054, complen=0xa6bd52d8)
    at mysql-5.5.4-m3/sql/net_serv.cc:836
#4  0x0814d89e in my_net_read (net=0x9727054)
    at mysql-5.5.4-m3/sql/net_serv.cc:1026
#5  0x081e401a in do_command (thd=0x9726e98)
    at mysql-5.5.4-m3/sql/sql_parse.cc:656
#6  0x082b1762 in do_handle_one_connection (thd_arg=0x9726e98)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#7  0x082b182d in handle_one_connection (arg=0x9726e98)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#8  0x0089a45b in start_thread () from /lib/libpthread.so.0
#9  0x007f1c4e in clone () from /lib/libc.so.6

Thread 11 (process 19932):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa6a6ee7c, mp=0xa6a6ee38, 
    abstime=0xa699be74, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa6a6ee7c, 
    mutex=0xa6a6ee38, abstime=0xa699be74, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa6a6ed70, 
    abs_timeout=0xa699be74)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bc379 in MDL_context::acquire_lock_impl (this=0xa6a6ed70, 
    mdl_request=0xa17a264, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1555
#6  0x082bc8da in MDL_context::acquire_locks (this=0xa6a6ed70, 
    mdl_requests=0xa699c0b8, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1654
#7  0x083f9f37 in lock_table_names (thd=0xa6a6ed00, table_list=0xa17a070)
    at mysql-5.5.4-m3/sql/lock.cc:901
#8  0x081d8f07 in flush_tables (thd=0xa6a6ed00, all_tables=0xa17a070)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1812
#9  0x081df11d in mysql_execute_command (thd=0xa6a6ed00)
    at mysql-5.5.4-m3/sql/sql_parse.cc:4003
#10 0x081e1b35 in mysql_parse (thd=0xa6a6ed00, 
    inBuf=0xa179f68 "FLUSH TABLE testdb_N . t1_base1_N  , testdb_N . t1_view1_N", length=58, found_semicolon=0xa699d248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#11 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa6a6ed00, 
    packet=0xa6a18211 "FLUSH TABLE testdb_N . t1_base1_N  , testdb_N . t1_view1_N ", packet_length=59)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#12 0x081e41dc in do_command (thd=0xa6a6ed00)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#13 0x082b1762 in do_handle_one_connection (thd_arg=0xa6a6ed00)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#14 0x082b182d in handle_one_connection (arg=0xa6a6ed00)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#15 0x0089a45b in start_thread () from /lib/libpthread.so.0
#16 0x007f1c4e in clone () from /lib/libc.so.6

Thread 10 (process 20293):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa6511a3c, mp=0xa65119f8, 
    abstime=0xa67fd8a0, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa6511a3c, 
    mutex=0xa65119f8, abstime=0xa67fd8a0, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa6511930, 
    abs_timeout=0xa67fd8a0)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bbe17 in MDL_context::wait_for_lock (this=0xa6511930, 
    mdl_request=0xa06bd84, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:2022
#6  0x0818ff04 in Open_table_context::recover_from_failed_open (
    this=0xa67fdcb8, thd=0xa65118c0, mdl_request=0xa06bd84, table=0xa06bb90)
    at mysql-5.5.4-m3/sql/sql_base.cc:3908
#7  0x08192822 in open_tables (thd=0xa65118c0, start=0xa67fe114, 
    counter=0xa67fe088, flags=0, prelocking_strategy=0xa67fdd2c)
    at mysql-5.5.4-m3/sql/sql_base.cc:4697
#8  0x0819610f in open_tables (thd=0xa65118c0, tables=0xa67fe114, 
    counter=0xa67fe088, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1575
#9  0x08272989 in mysql_update (thd=0xa65118c0, table_list=0xa06bb90, 
    fields=@0xa6512da8, values=@0xa6512fc0, conds=0xa06c410, order_num=0, 
    order=0x0, limit=1, handle_duplicates=DUP_ERROR, ignore=false, 
    found_return=0xa67fead0, updated_return=0xa67feac8)
    at mysql-5.5.4-m3/sql/sql_update.cc:212
#10 0x081dbf48 in mysql_execute_command (thd=0xa65118c0)
    at mysql-5.5.4-m3/sql/sql_parse.cc:3123
#11 0x081e1b35 in mysql_parse (thd=0xa65118c0, 
    inBuf=0xa06ba50 "UPDATE   testdb_S . t1_base2_N  SET `pk` = 0 WHERE SLEEP( 0.5 * 0.18 * 1 ) = 0 LIMIT 1", length=86, found_semicolon=0xa67ff248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#12 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa65118c0, 
    packet=0xa6535e49 "UPDATE   testdb_S . t1_base2_N  SET `pk` = 0 WHERE SLEEP( 0.5 * 0.18 * 1 ) = 0 LIMIT 1", packet_length=86)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#13 0x081e41dc in do_command (thd=0xa65118c0)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#14 0x082b1762 in do_handle_one_connection (thd_arg=0xa65118c0)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#15 0x082b182d in handle_one_connection (arg=0xa65118c0)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#16 0x0089a45b in start_thread () from /lib/libpthread.so.0
#17 0x007f1c4e in clone () from /lib/libc.so.6

Thread 9 (process 20302):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e256 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x08647a0a in safe_cond_wait (cond=0x9fd2174, mp=0x9fd2128, 
    file=0x87a4c14 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1064)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:240
#3  0x08488951 in inline_mysql_cond_wait (that=0x9fd2174, mutex=0x9fd2128, 
    src_file=0x87a4c78 "mysql-5.5.4-m3/sql/event_scheduler.cc", src_line=765)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1064
#4  0x08488ddb in Event_scheduler::cond_wait (this=0x9fd2128, thd=0xa6517880, 
    abstime=0x0, msg=0x87a4fbb "Waiting scheduler to stop", 
    func=0x87a5488 "stop", line=658)
    at mysql-5.5.4-m3/sql/event_scheduler.cc:765
#5  0x084894a0 in Event_scheduler::stop (this=0x9fd2128)
    at mysql-5.5.4-m3/sql/event_scheduler.cc:658
#6  0x082986c2 in Events::stop ()
    at mysql-5.5.4-m3/sql/events.cc:1043
#7  0x082d264e in event_scheduler_update (self=0x8acbe80, thd=0xa6517880, 
    type=OPT_GLOBAL)
    at mysql-5.5.4-m3/sql/sys_vars.cc:670
#8  0x0815a883 in sys_var::update (this=0x8acbe80, thd=0xa6517880, 
    var=0xa008f30)
    at mysql-5.5.4-m3/sql/set_var.cc:174
#9  0x0815c4b8 in set_var::update (this=0xa008f30, thd=0xa6517880)
    at mysql-5.5.4-m3/sql/set_var.cc:641
#10 0x0815b217 in sql_set_variables (thd=0xa6517880, var_list=0xa6518fa4)
    at mysql-5.5.4-m3/sql/set_var.cc:545
#11 0x081dd450 in mysql_execute_command (thd=0xa6517880)
    at mysql-5.5.4-m3/sql/sql_parse.cc:3507
#12 0x081e1b35 in mysql_parse (thd=0xa6517880, 
    inBuf=0xa008df8 "SET GLOBAL EVENT_SCHEDULER = OFF", length=32, 
    found_semicolon=0xa69ce248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#13 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa6517880, 
    packet=0xa657a069 "SET GLOBAL EVENT_SCHEDULER = OFF", packet_length=32)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#14 0x081e41dc in do_command (thd=0xa6517880)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#15 0x082b1762 in do_handle_one_connection (thd_arg=0xa6517880)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#16 0x082b182d in handle_one_connection (arg=0xa6517880)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#17 0x0089a45b in start_thread () from /lib/libpthread.so.0
#18 0x007f1c4e in clone () from /lib/libc.so.6

Thread 8 (process 20304):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa651a054, mp=0xa651a010, 
    abstime=0xa6b407a0, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa651a054, 
    mutex=0xa651a010, abstime=0xa6b407a0, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa6519f48, 
    abs_timeout=0xa6b407a0)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bbe17 in MDL_context::wait_for_lock (this=0xa6519f48, 
    mdl_request=0xa0d04ac, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:2022
#6  0x0818ff04 in Open_table_context::recover_from_failed_open (
    this=0xa6b40bb8, thd=0xa6519ed8, mdl_request=0xa0d04ac, table=0xa0d02b8)
    at mysql-5.5.4-m3/sql/sql_base.cc:3908
#7  0x08192822 in open_tables (thd=0xa6519ed8, start=0xa6b40c54, 
    counter=0xa6b40c3c, flags=0, prelocking_strategy=0xa6b40c7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:4697
#8  0x08192ce0 in open_and_lock_tables (thd=0xa6519ed8, tables=0xa0d02b8, 
    derived=true, flags=0, prelocking_strategy=0xa6b40c7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:5238
#9  0x081823ae in open_and_lock_tables (thd=0xa6519ed8, tables=0xa0d02b8, 
    derived=true, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1587
#10 0x081d861c in execute_sqlcom_select (thd=0xa6519ed8, all_tables=0xa0d02b8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:4805
#11 0x081d9c51 in mysql_execute_command (thd=0xa6519ed8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:2325
#12 0x081e1b35 in mysql_parse (thd=0xa6519ed8, 
    inBuf=0xa0cfeb8 "SELECT   `col_int_key` , `col_int` , `pk`  FROM testdb_S . t1_base2_N  AS A WHERE A.`pk` IN ( SELECT `pk` FROM testdb_N . t1_merge1_N  AS B WHERE B.`pk` = 7 )", length=158, found_semicolon=0xa6b42248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#13 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa6519ed8, 
    packet=0xa6568069 "SELECT   `col_int_key` , `col_int` , `pk`  FROM testdb_S . t1_base2_N  AS A WHERE A.`pk` IN ( SELECT `pk` FROM testdb_N . t1_merge1_N  AS B WHERE B.`pk` = 7 )   ", packet_length=161)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#14 0x081e41dc in do_command (thd=0xa6519ed8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#15 0x082b1762 in do_handle_one_connection (thd_arg=0xa6519ed8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#16 0x082b182d in handle_one_connection (arg=0xa6519ed8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#17 0x0089a45b in start_thread () from /lib/libpthread.so.0
#18 0x007f1c4e in clone () from /lib/libc.so.6

Thread 7 (process 20312):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa65661e4, mp=0xa65661a0, 
    abstime=0xa69fda74, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa65661e4, 
    mutex=0xa65661a0, abstime=0xa69fda74, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa65660d8, 
    abs_timeout=0xa69fda74)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bc379 in MDL_context::acquire_lock_impl (this=0xa65660d8, 
    mdl_request=0xa0c859c, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1555
#6  0x082bc8da in MDL_context::acquire_locks (this=0xa65660d8, 
    mdl_requests=0xa69fdb08, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1654
#7  0x0818b49f in open_table_get_mdl_lock (thd=0xa6566068, 
    table_list=0xa0c83a8, mdl_request=0xa0c859c, ot_ctx=0xa69fe038, flags=0)
    at mysql-5.5.4-m3/sql/sql_base.cc:2426
#8  0x08190d2b in open_table (thd=0xa6566068, table_list=0xa0c83a8, 
    mem_root=0xa69fe004, ot_ctx=0xa69fe038, flags=0)
    at mysql-5.5.4-m3/sql/sql_base.cc:2737
#9  0x08192102 in open_and_process_table (thd=0xa6566068, lex=0xa6567034, 
    tables=0xa0c83a8, counter=0xa69fe0bc, flags=0, 
    prelocking_strategy=0xa69fe0fc, has_prelocking_list=false, 
    ot_ctx=0xa69fe038, new_frm_mem=0xa69fe004)
    at mysql-5.5.4-m3/sql/sql_base.cc:4268
#10 0x081927b7 in open_tables (thd=0xa6566068, start=0xa69fe0d4, 
    counter=0xa69fe0bc, flags=0, prelocking_strategy=0xa69fe0fc)
    at mysql-5.5.4-m3/sql/sql_base.cc:4668
#11 0x08192ce0 in open_and_lock_tables (thd=0xa6566068, tables=0xa0c83a8, 
    derived=true, flags=0, prelocking_strategy=0xa69fe0fc)
    at mysql-5.5.4-m3/sql/sql_base.cc:5238
#12 0x081823ae in open_and_lock_tables (thd=0xa6566068, tables=0xa0c83a8, 
    derived=true, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1587
#13 0x081da8b8 in mysql_execute_command (thd=0xa6566068)
    at mysql-5.5.4-m3/sql/sql_parse.cc:2682
#14 0x081e1b35 in mysql_parse (thd=0xa6566068, 
    inBuf=0xa0c81d8 "CREATE TABLE IF NOT EXISTS testdb_S . t1_base2_N  AS SELECT   `col_int` , `pk` , `col_int_key`  FROM testdb_S . t1_base2_S   A WHERE `pk` BETWEEN 0 AND 0 + 1", length=157, found_semicolon=0xa69ff248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#15 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa6566068, 
    packet=0xa6576019 "CREATE TABLE IF NOT EXISTS testdb_S . t1_base2_N  AS SELECT   `col_int` , `pk` , `col_int_key`  FROM testdb_S . t1_base2_S   A WHERE `pk` BETWEEN 0 AND 0 + 1", packet_length=157)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#16 0x081e41dc in do_command (thd=0xa6566068)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#17 0x082b1762 in do_handle_one_connection (thd_arg=0xa6566068)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#18 0x082b182d in handle_one_connection (arg=0xa6566068)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#19 0x0089a45b in start_thread () from /lib/libpthread.so.0
#20 0x007f1c4e in clone () from /lib/libc.so.6

Thread 6 (process 20313):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa651bd54, mp=0xa651bd10, 
    abstime=0xa696a7a0, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa651bd54, 
    mutex=0xa651bd10, abstime=0xa696a7a0, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa651bc48, 
    abs_timeout=0xa696a7a0)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bbe17 in MDL_context::wait_for_lock (this=0xa651bc48, 
    mdl_request=0xa0aaddc, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:2022
#6  0x0818ff04 in Open_table_context::recover_from_failed_open (
    this=0xa696abb8, thd=0xa651bbd8, mdl_request=0xa0aaddc, table=0xa0aabe8)
    at mysql-5.5.4-m3/sql/sql_base.cc:3908
#7  0x08192822 in open_tables (thd=0xa651bbd8, start=0xa696ac54, 
    counter=0xa696ac3c, flags=0, prelocking_strategy=0xa696ac7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:4697
#8  0x08192ce0 in open_and_lock_tables (thd=0xa651bbd8, tables=0xa0aabe8, 
    derived=true, flags=0, prelocking_strategy=0xa696ac7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:5238
#9  0x081823ae in open_and_lock_tables (thd=0xa651bbd8, tables=0xa0aabe8, 
    derived=true, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1587
#10 0x081d861c in execute_sqlcom_select (thd=0xa651bbd8, all_tables=0xa0aabe8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:4805
#11 0x081d9c51 in mysql_execute_command (thd=0xa651bbd8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:2325
#12 0x081e1b35 in mysql_parse (thd=0xa651bbd8, 
    inBuf=0xa0aa7d0 "SELECT   `pk` , `col_int_key` , `pk`  FROM testdb_N . t1_view2_N   A PROCEDURE ANALYSE( 10 , 2000 ) UNION SELECT * FROM testdb_S . t1_merge2_S  AS B WHERE `pk` BETWEEN 3 AND 3 + 1", length=179, 
    found_semicolon=0xa696c248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#13 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa651bbd8, 
    packet=0xa65135c1 "SELECT   `pk` , `col_int_key` , `pk`  FROM testdb_N . t1_view2_N   A PROCEDURE ANALYSE( 10 , 2000 ) UNION SELECT * FROM testdb_S . t1_merge2_S  AS B WHERE `pk` BETWEEN 3 AND 3 + 1  ", packet_length=181)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#14 0x081e41dc in do_command (thd=0xa651bbd8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#15 0x082b1762 in do_handle_one_connection (thd_arg=0xa651bbd8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#16 0x082b182d in handle_one_connection (arg=0xa651bbd8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#17 0x0089a45b in start_thread () from /lib/libpthread.so.0
#18 0x007f1c4e in clone () from /lib/libc.so.6

Thread 5 (process 20317):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa655ea34, mp=0xa655e9f0, 
    abstime=0xa6b71a24, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa655ea34, 
    mutex=0xa655e9f0, abstime=0xa6b71a24, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa655e928, 
    abs_timeout=0xa6b71a24)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bc379 in MDL_context::acquire_lock_impl (this=0xa655e928, 
    mdl_request=0xa06fd5c, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1555
#6  0x082bc8da in MDL_context::acquire_locks (this=0xa655e928, 
    mdl_requests=0xa6b71c68, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1654
#7  0x083f9f37 in lock_table_names (thd=0xa655e8b8, table_list=0xa06fb68)
    at mysql-5.5.4-m3/sql/lock.cc:901
#8  0x08275d72 in mysql_drop_view (thd=0xa655e8b8, views=0xa06fb68, 
    drop_mode=DROP_RESTRICT)
    at mysql-5.5.4-m3/sql/sql_view.cc:1611
#9  0x081e0fea in mysql_execute_command (thd=0xa655e8b8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:4590
#10 0x081e1b35 in mysql_parse (thd=0xa655e8b8, 
    inBuf=0xa06fa80 "DROP VIEW  testdb_N . t1_view2_N  RESTRICT", length=42, 
    found_semicolon=0xa6b73248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#11 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa655e8b8, 
    packet=0xa6500661 "DROP VIEW  testdb_N . t1_view2_N  RESTRICT", 
    packet_length=42)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#12 0x081e41dc in do_command (thd=0xa655e8b8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#13 0x082b1762 in do_handle_one_connection (thd_arg=0xa655e8b8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#14 0x082b182d in handle_one_connection (arg=0xa655e8b8)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#15 0x0089a45b in start_thread () from /lib/libpthread.so.0
#16 0x007f1c4e in clone () from /lib/libc.so.6

Thread 4 (process 20318):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa654e7bc, mp=0xa654e778, 
    abstime=0xa67397a0, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa654e7bc, 
    mutex=0xa654e778, abstime=0xa67397a0, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa654e6b0, 
    abs_timeout=0xa67397a0)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bbe17 in MDL_context::wait_for_lock (this=0xa654e6b0, 
    mdl_request=0xa07aeac, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:2022
#6  0x0818ff04 in Open_table_context::recover_from_failed_open (
    this=0xa6739bb8, thd=0xa654e640, mdl_request=0xa07aeac, table=0xa07acb8)
    at mysql-5.5.4-m3/sql/sql_base.cc:3908
#7  0x08192822 in open_tables (thd=0xa654e640, start=0xa6739c54, 
    counter=0xa6739c3c, flags=0, prelocking_strategy=0xa6739c7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:4697
#8  0x08192ce0 in open_and_lock_tables (thd=0xa654e640, tables=0xa07acb8, 
    derived=true, flags=0, prelocking_strategy=0xa6739c7c)
    at mysql-5.5.4-m3/sql/sql_base.cc:5238
#9  0x081823ae in open_and_lock_tables (thd=0xa654e640, tables=0xa07acb8, 
    derived=true, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1587
#10 0x081d861c in execute_sqlcom_select (thd=0xa654e640, all_tables=0xa07acb8)
    at mysql-5.5.4-m3/sql/sql_parse.cc:4805
#11 0x081d9c51 in mysql_execute_command (thd=0xa654e640)
    at mysql-5.5.4-m3/sql/sql_parse.cc:2325
#12 0x081e1b35 in mysql_parse (thd=0xa654e640, 
    inBuf=0xa07a8b0 "SELECT   `col_int_key` , `col_int` , `pk`  FROM testdb_N . t1_view2_N  AS A WHERE A.`pk` IN ( SELECT `pk` FROM testdb_N . t1_merge1_N  AS B WHERE B.`pk` = A.`pk` )", length=163, found_semicolon=0xa673b248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#13 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa654e640, 
    packet=0xa65523c9 "SELECT   `col_int_key` , `col_int` , `pk`  FROM testdb_N . t1_view2_N  AS A WHERE A.`pk` IN ( SELECT `pk` FROM testdb_N . t1_merge1_N  AS B WHERE B.`pk` = A.`pk` )   ", packet_length=166)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#14 0x081e41dc in do_command (thd=0xa654e640)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#15 0x082b1762 in do_handle_one_connection (thd_arg=0xa654e640)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#16 0x082b182d in handle_one_connection (arg=0xa654e640)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#17 0x0089a45b in start_thread () from /lib/libpthread.so.0
#18 0x007f1c4e in clone () from /lib/libc.so.6

Thread 3 (process 20319):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa653dfe4, mp=0xa653dfa0, 
    abstime=0xa6ba27e4, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa653dfe4, 
    mutex=0xa653dfa0, abstime=0xa6ba27e4, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa653ded8, 
    abs_timeout=0xa6ba27e4)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bc379 in MDL_context::acquire_lock_impl (this=0xa653ded8, 
    mdl_request=0xa0bfda4, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1555
#6  0x082bc8da in MDL_context::acquire_locks (this=0xa653ded8, 
    mdl_requests=0xa6ba2884, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:1654
#7  0x0818bfad in open_tables_acquire_upgradable_mdl (thd=0xa653de68, 
    tables_start=0xa0bfbb0, tables_end=0x0, ot_ctx=0xa6ba2908)
    at mysql-5.5.4-m3/sql/sql_base.cc:4464
#8  0x08192752 in open_tables (thd=0xa653de68, start=0xa6ba29a4, 
    counter=0xa6ba298c, flags=32, prelocking_strategy=0xa6ba29cc)
    at mysql-5.5.4-m3/sql/sql_base.cc:4641
#9  0x08192ce0 in open_and_lock_tables (thd=0xa653de68, tables=0xa0bfbb0, 
    derived=true, flags=32, prelocking_strategy=0xa6ba29cc)
    at mysql-5.5.4-m3/sql/sql_base.cc:5238
#10 0x081823ae in open_and_lock_tables (thd=0xa653de68, tables=0xa0bfbb0, 
    derived=true, flags=32)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1587
#11 0x0825dbf1 in mysql_admin_table (thd=0xa653de68, tables=0xa0bfbb0, 
    check_opt=0xa653f624, operator_name=0x871141b "repair", 
    lock_type=TL_WRITE, open_for_modify=true, no_warnings_for_error=false, 
    extra_open_options=32, prepare_func=0x8251252 <prepare_for_repair>, 
    operator_func=
      {__pfn = 0x8344e4a <handler::ha_repair(THD*, st_ha_check_opt*)>, __delta = 0}, view_operator_func=0)
    at mysql-5.5.4-m3/sql/sql_table.cc:4680
#12 0x0825fbaf in mysql_repair_table (thd=0xa653de68, tables=0xa0bfbb0, 
    check_opt=0xa653f624)
    at mysql-5.5.4-m3/sql/sql_table.cc:5156
#13 0x081db938 in mysql_execute_command (thd=0xa653de68)
    at mysql-5.5.4-m3/sql/sql_parse.cc:3038
#14 0x081e1b35 in mysql_parse (thd=0xa653de68, 
    inBuf=0xa0bfac8 "REPAIR LOCAL TABLE testdb_N . t1_view2_N", length=40, 
    found_semicolon=0xa6ba4248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#15 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa653de68, 
    packet=0xa656c079 "", packet_length=43)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#16 0x081e41dc in do_command (thd=0xa653de68)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#17 0x082b1762 in do_handle_one_connection (thd_arg=0xa653de68)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#18 0x082b182d in handle_one_connection (arg=0xa653de68)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#19 0x0089a45b in start_thread () from /lib/libpthread.so.0
#20 0x007f1c4e in clone () from /lib/libc.so.6

Thread 2 (process 20320):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089e4dc in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0x08647bc7 in safe_cond_timedwait (cond=0xa650fa9c, mp=0xa650fa58, 
    abstime=0xa66d78a0, 
    file=0x8724568 "mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h", line=1092)
    at mysql-5.5.4-m3/mysys/thr_mutex.c:278
#3  0x082bab8a in inline_mysql_cond_timedwait (that=0xa650fa9c, 
    mutex=0xa650fa58, abstime=0xa66d78a0, 
    src_file=0x8724264 "mysql-5.5.4-m3/sql/mdl.cc", src_line=883)
    at mysql-5.5.4-m3/include/mysql/psi/mysql_thread.h:1092
#4  0x082bac79 in MDL_context::timed_wait (this=0xa650f990, 
    abs_timeout=0xa66d78a0)
    at mysql-5.5.4-m3/sql/mdl.cc:882
#5  0x082bbe17 in MDL_context::wait_for_lock (this=0xa650f990, 
    mdl_request=0xa1f7564, lock_wait_timeout=31536000)
    at mysql-5.5.4-m3/sql/mdl.cc:2022
#6  0x0818ff04 in Open_table_context::recover_from_failed_open (
    this=0xa66d7cb8, thd=0xa650f920, mdl_request=0xa1f7564, table=0xa1f7370)
    at mysql-5.5.4-m3/sql/sql_base.cc:3908
#7  0x08192822 in open_tables (thd=0xa650f920, start=0xa66d8114, 
    counter=0xa66d8088, flags=0, prelocking_strategy=0xa66d7d2c)
    at mysql-5.5.4-m3/sql/sql_base.cc:4697
#8  0x0819610f in open_tables (thd=0xa650f920, tables=0xa66d8114, 
    counter=0xa66d8088, flags=0)
    at mysql-5.5.4-m3/sql/mysql_priv.h:1575
#9  0x08272989 in mysql_update (thd=0xa650f920, table_list=0xa1f7370, 
    fields=@0xa6510e08, values=@0xa6511020, conds=0xa1f7c00, order_num=0, 
    order=0x0, limit=1, handle_duplicates=DUP_ERROR, ignore=false, 
    found_return=0xa66d8ad0, updated_return=0xa66d8ac8)
    at mysql-5.5.4-m3/sql/sql_update.cc:212
#10 0x081dbf48 in mysql_execute_command (thd=0xa650f920)
    at mysql-5.5.4-m3/sql/sql_parse.cc:3123
#11 0x081e1b35 in mysql_parse (thd=0xa650f920, 
    inBuf=0xa1f7228 "UPDATE   testdb_N . t1_view2_N  SET `col_int` = 4 WHERE SLEEP( 0.5 * 0.73 * 1 ) = 0 LIMIT 1", length=91, found_semicolon=0xa66d9248)
    at mysql-5.5.4-m3/sql/sql_parse.cc:5872
#12 0x081e2f31 in dispatch_command (command=COM_QUERY, thd=0xa650f920, 
    packet=0xa6539e59 "UPDATE   testdb_N . t1_view2_N  SET `col_int` = 4 WHERE SLEEP( 0.5 * 0.73 * 1 ) = 0 LIMIT 1", packet_length=91)
    at mysql-5.5.4-m3/sql/sql_parse.cc:1024
#13 0x081e41dc in do_command (thd=0xa650f920)
    at mysql-5.5.4-m3/sql/sql_parse.cc:710
#14 0x082b1762 in do_handle_one_connection (thd_arg=0xa650f920)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1174
#15 0x082b182d in handle_one_connection (arg=0xa650f920)
    at mysql-5.5.4-m3/sql/sql_connect.cc:1113
#16 0x0089a45b in start_thread () from /lib/libpthread.so.0
#17 0x007f1c4e in clone () from /lib/libc.so.6

Thread 1 (process 14622):
#0  0x0025f402 in __kernel_vsyscall ()
#1  0x0089f067 in pthread_kill () from /lib/libpthread.so.0
#2  0x08642251 in my_write_core (sig=11)
    at mysql-5.5.4-m3/mysys/stacktrace.c:326
#3  0x081457de in handle_segfault (sig=11)
    at mysql-5.5.4-m3/sql/mysqld.cc:2749
#4  <signal handler called>
#5  0x0025f402 in __kernel_vsyscall ()
#6  0x007e8033 in poll () from /lib/libc.so.6
#7  0x08146068 in handle_connections_sockets ()
    at mysql-5.5.4-m3/sql/mysqld.cc:5360
#8  0x0814aafd in mysqld_main (argc=47, argv=0x96e5f20)
    at mysql-5.5.4-m3/sql/mysqld.cc:4822
#9  0x0813e8e2 in main (argc=)
    at mysql-5.5.4-m3/sql/main.cc:24