nnoDB: Warning: hash index ref_count (1) is not zero after fil_discard_tablespace().
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Warning: hash index ref_count (1) is not zero after fil_discard_tablespace().
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 5 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 10 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 15 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 20 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 25 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 30 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 35 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 40 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 45 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 50 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 55 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 60 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 65 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 70 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 75 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 80 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 85 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 90 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 95 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 100 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 105 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 110 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 115 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 120 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 125 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 130 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 135 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 140 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 145 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 150 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 155 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 160 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 165 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 170 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 175 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 180 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 185 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 190 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 195 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 200 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 205 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 210 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 215 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 220 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 225 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 230 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 235 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 240 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 245 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 250 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 255 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 260 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 265 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 270 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 275 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 280 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 285 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 290 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 295 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 300 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 305 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 310 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 315 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 320 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 325 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 330 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 335 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 340 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 345 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 350 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 355 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 360 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 365 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 370 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 375 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 380 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 385 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 390 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 395 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 400 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 405 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 410 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 415 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 420 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 425 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 430 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 435 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 440 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 445 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 450 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 455 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 460 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 465 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 470 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 475 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 480 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 485 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 490 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 495 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 500 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 505 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 510 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 515 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 520 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 525 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 530 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 535 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 540 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 545 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 550 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 555 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 560 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 565 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 570 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 575 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 580 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 585 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 590 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 595 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
InnoDB: Error: Waited for 600 secs for hash index ref_count (1) to drop to 0.
index: "PRIMARY" table: "demo_production/questions"
130308 22:36:02  InnoDB: Assertion failure in thread 140314953815808 in file dict0dict.c line 1900
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/5.5/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
22:36:02 UTC - 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.
Please help us make Percona Server better by reporting any
bugs at http://bugs.percona.com/

key_buffer_size=16777216
read_buffer_size=131072
max_used_connections=36
max_threads=514
thread_count=35
connection_count=35
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1141140 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x3dabec0
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 = 7f9d9efa8e68 thread_stack 0x40000
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(my_print_stacktrace+0x35)[0x7deff5]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(handle_fatal_signal+0x3f4)[0x69ad04]
/lib64/libpthread.so.0[0x3b9f00f500]
/lib64/libc.so.6(gsignal+0x35)[0x3b9e8328a5]
/lib64/libc.so.6(abort+0x175)[0x3b9e834085]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld[0x895f94]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld[0x89715d]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld[0x811c11]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld[0x7f3461]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z15ha_delete_tableP3THDP10handlertonPKcS4_S4_b+0x101)[0x69ff81]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z23mysql_rm_table_no_locksP3THDP10TABLE_LISTbbbb+0x348)[0x5e6b18]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z14mysql_rm_tableP3THDP10TABLE_LISTcc+0x144)[0x5e7664]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z21mysql_execute_commandP3THD+0x1aa2)[0x57f932]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x3c3)[0x584413]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x14aa)[0x5858da]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z10do_commandP3THD+0x104)[0x585c64]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(_Z24do_handle_one_connectionP3THD+0x114)[0x623a84]
/u/mysql/server/5.5.29-30.0-percona/bin/mysqld(handle_one_connection+0x54)[0x623b74]
/lib64/libpthread.so.0[0x3b9f007851]
/lib64/libc.so.6(clone+0x6d)[0x3b9e8e811d]

Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (7f9d24004c00): is an invalid pointer
Connection ID (thread ID): 5095
Status: KILL_CONNECTION

You may download the Percona Server operations manual by visiting
http://www.percona.com/software/percona-server/. You may find information
in the manual which will help you identify the cause of the crash.
Writing a core file
130308 22:36:02 mysqld_safe Number of processes running now: 0
130308 22:36:02 mysqld_safe mysqld restarted
130308 22:36:02 [Note] Plugin 'FEDERATED' is disabled.
130308 22:36:02 InnoDB: The InnoDB memory heap is disabled
130308 22:36:02 InnoDB: Mutexes and rw_locks use GCC atomic builtins
130308 22:36:02 InnoDB: Compressed tables use zlib 1.2.3
130308 22:36:02 InnoDB: Using Linux native AIO
130308 22:36:02 InnoDB: Initializing buffer pool, size = 512.0M
130308 22:36:02 InnoDB: Completed initialization of buffer pool
130308 22:36:02 InnoDB: highest supported file format is Barracuda.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
130308 22:36:02  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
InnoDB: 1 transaction(s) which must be rolled back or cleaned up
InnoDB: in total 8 row operations to undo
InnoDB: Trx id counter is 2400
InnoDB: Last MySQL binlog file position 0 113598, file name /u/mysql/binlogs/demo/binlog.000003
130308 22:36:02  InnoDB: Rolling back trx with id 22DA, 8 rows to undo
InnoDB: Dropping table with id 32 in recovery if it exists
InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!

InnoDB: Rolling back of trx id 22DA completed
130308 22:36:02 InnoDB: Restoring buffer pool pages from ib_lru_dump
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 64
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 65
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 66
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 67
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 68
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 69
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 70
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 71
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 72
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 73
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 74
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 75
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 76
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 77
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 78
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 79
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 80
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 81
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 82
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 83
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 84
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 85
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 86
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 87
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 88
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 89
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 90
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 91
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 92
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 93
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 94
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 95
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 96
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 97
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 98
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 99
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 100
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 101
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 102
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 103
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 104
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 105
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 106
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 107
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 108
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 109
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 110
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 111
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 112
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 113
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 114
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 115
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 116
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 117
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 118
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 119
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 120
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 121
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 122
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 123
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 124
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 125
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 126
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 127
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 128
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 129
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 130
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 131
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 132
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 133
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 134
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 135
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 136
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 137
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 138
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 139
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 140
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 141
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 142
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 143
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 144
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 145
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 146
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 147
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 148
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 149
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 150
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 151
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 152
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 153
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 154
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 155
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 156
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 157
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 158
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 159
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 160
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 161
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 162
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 163
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 164
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 165
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 166
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 167
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 168
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 169
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 170
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 171
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 172
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 173
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 174
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 175
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 176
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 177
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 178
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 179
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 180
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 181
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 182
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 183
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 184
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 185
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 186
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 187
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 188
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 189
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 190
130308 22:36:02  InnoDB: Warning: trying to read doublewrite buffer page 191
130308 22:36:02 InnoDB: Completed reading buffer pool pages (requested: 531, read: 94)
130308 22:36:02  InnoDB: Waiting for the background threads to start
130308 22:36:03 Percona XtraDB (http://www.percona.com) 1.1.8-rel30.0 started; log sequence number 1963857
130308 22:36:03 [Note] Recovering after a crash using /u/mysql/binlogs/demo/binlog
130308 22:36:03 [Note] Starting crash recovery...
130308 22:36:03 [Note] Crash recovery finished.
130308 22:36:03 [Note] Event Scheduler: Loaded 0 events
130308 22:36:03 [Note] /u/mysql/server/5.5.29-30.0-percona/bin/mysqld: ready for connections.
Version: '5.5.29-rel30.0-log'  socket: '/tmp/mysql.demo.sock'  port: 3321  Percona Server with XtraDB (GPL), Release rel30.0, Revision 451
130308 22:37:02 [Note] Start binlog_dump to slave_server(653321), pos(binlog.000003, 113598)
InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:37:10 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:37:24 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:37:35 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:37:46 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:38:03 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:38:13 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:38:28 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:39:53 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:40:20 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:40:26 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:40:32 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:42:10 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:42:20 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:42:36 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:42:41 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:42:44 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.

InnoDB: Error: trying to load index PRIMARY for table demo_production/questions
InnoDB: but the index tree has been freed!
130308 22:43:06 [ERROR] Cannot find or open table demo_production/questions from
the internal data dictionary of InnoDB though the .frm file for the
table exists. Maybe you have deleted and recreated InnoDB data
files but have forgotten to delete the corresponding .frm files
of InnoDB tables, or you have moved .frm files to another database?
or, the table contains indexes that this version of the engine
doesn't support.
See http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting.html
how you can resolve the problem.