090902 10:43:55 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mpb-bin.000534' position 47010998
InnoDB: Unable to lock ./timer2/rates.ibd, error: 37
090902 11:08:43  InnoDB: Assertion failure in thread 1312495936 in file fil/fil0fil.c line 752
InnoDB: Failing assertion: ret
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html
InnoDB: about forcing recovery.
090902 11:08:43 - 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.
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.

key_buffer_size=67108864
read_buffer_size=131072
max_used_connections=2
max_threads=128
threads_connected=2
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 345366 K
bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

thd: 0xf95a8a0
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 = 0x4e3b0f20 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x35)[0x83bd65]
/usr/sbin/mysqld(handle_segfault+0x31d)[0x58dd4d]
/lib64/libpthread.so.0[0x2b869c7984c0]
/lib64/libc.so.6(gsignal+0x35)[0x2b869d2ad215]
/lib64/libc.so.6(abort+0x110)[0x2b869d2aecc0]
/usr/sbin/mysqld[0x741e55]
/usr/sbin/mysqld[0x742078]
/usr/sbin/mysqld[0x744b65]
/usr/sbin/mysqld[0x7300a9]
/usr/sbin/mysqld[0x728337]
/usr/sbin/mysqld[0x7d135e]
/usr/sbin/mysqld[0x7d1439]
/usr/sbin/mysqld[0x7d1b18]
/usr/sbin/mysqld[0x732e45]
/usr/sbin/mysqld[0x73690b]
/usr/sbin/mysqld[0x70b9b8]
/usr/sbin/mysqld(_ZN7handler7ha_openEP8st_tablePKcii+0x3e)[0x66a50e]
/usr/sbin/mysqld(_Z21open_table_from_shareP3THDP14st_table_sharePKcjjjP8st_tableb+0x597)[0x5e6cb7]
/usr/sbin/mysqld[0x5db6fe]
/usr/sbin/mysqld(_Z10open_tableP3THDP10TABLE_LISTP11st_mem_rootPbj+0x59c)[0x5dd0ac]
/usr/sbin/mysqld(_Z11open_tablesP3THDPP10TABLE_LISTPjj+0x4cf)[0x5dddcf]
/usr/sbin/mysqld(_Z28open_and_lock_tables_derivedP3THDP10TABLE_LISTb+0x67)[0x5de087]
/usr/sbin/mysqld[0x684cef]
/usr/sbin/mysqld(_Z17mysql_check_tableP3THDP10TABLE_LISTP15st_ha_check_opt+0x5e)[0x685cce]
/usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x28d8)[0x59d4e8]
/usr/sbin/mysqld(_Z11mysql_parseP3THDPKcjPS2_+0x1dc)[0x5a07bc]
/usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0xf98)[0x5a1778]
/usr/sbin/mysqld(_Z10do_commandP3THD+0xe7)[0x5a1cd7]
/usr/sbin/mysqld(handle_one_connection+0x592)[0x594c62]
/lib64/libpthread.so.0[0x2b869c790367]
/lib64/libc.so.6(clone+0x6d)[0x2b869d34ff7d]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort...
thd->query at 0xf9b1670 = CHECK TABLE `rates`  FOR UPGRADE
thd->thread_id=15
thd->killed=NOT_KILLED
The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
information that should help you find out what is causing the crash.
090902 11:08:43 mysqld_safe Number of processes running now: 0