Similar crash with same Assertion Failure message was encountered a few days ago.
Server version: 5.6.22-71.0-log Percona Server (GPL), Release 71.0, Revision 726
2015-09-24 11:13:07 7f612f8bc700 InnoDB: Assertion failure in thread 140055386244864 in file os0file.cc line 5126
InnoDB: Failing assertion: slot != NULL
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/5.6/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
05:43:07 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=1073741824
read_buffer_size=131072
max_used_connections=126
max_threads=1202
thread_count=7
connection_count=5
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1527811 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x0
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 = 0 thread_stack 0x40000
/usr/sbin/mysqld(my_print_stacktrace+0x2c)[0x9091dc]
/usr/sbin/mysqld(handle_fatal_signal+0x352)[0x662482]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x10340)[0x7f909a1cb340]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x39)[0x7f9099821bb9]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x148)[0x7f9099824fc8]
/usr/sbin/mysqld[0x98a2fb]
/usr/sbin/mysqld[0xa9dfb5]
/usr/sbin/mysqld[0x9f2d15]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8182)[0x7f909a1c3182]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f90998e5efd]
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.
150924 11:13:07 mysqld_safe Number of processes running now: 0
150924 11:13:07 mysqld_safe mysqld restarted
However as specified in the reproducible case disk space wasnt a constraint. There was more than 100G space remaining on the mysql datadir volume.
Below is the my.cnf
[mysql]
port = 3306
socket = /dbvol/mysql/var/run/mysqld/mysqld.sock
[mysqld]
user = mysql
default-storage-engine = InnoDB
socket = /dbvol/mysql/var/run/mysqld/mysqld.sock
pid-file = /dbvol/mysql/var/run/mysqld/mysqld.pid
The server doesnt have SWAP configured, would it be something which can also cause such an assertion ? There were OOM kill message either.
This has similar occurred on couple of other slaves with versions,
5.6.21-70.1-log Percona Server (GPL), Release 70.1, Revision 698
5.6.22-71.0-log Percona Server (GPL), Release 71.0, Revision 726
Similar crash with same Assertion Failure message was encountered a few days ago.
Server version: 5.6.22-71.0-log Percona Server (GPL), Release 71.0, Revision 726
2015-09-24 11:13:07 7f612f8bc700 InnoDB: Assertion failure in thread 140055386244864 in file os0file.cc line 5126 bugs.mysql. com. dev.mysql. com/doc/ refman/ 5.6/en/ forcing- innodb- recovery. html bugs.percona. com/
InnoDB: Failing assertion: slot != NULL
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://
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://
InnoDB: about forcing recovery.
05:43:07 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://
key_buffer_ size=1073741824 size=131072 connections= 126 size)*max_ threads = 1527811 K bytes of memory
read_buffer_
max_used_
max_threads=1202
thread_count=7
connection_count=5
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x0 mysqld( my_print_ stacktrace+ 0x2c)[0x9091dc] mysqld( handle_ fatal_signal+ 0x352)[ 0x662482] 64-linux- gnu/libpthread. so.0(+0x10340) [0x7f909a1cb340 ] 64-linux- gnu/libc. so.6(gsignal+ 0x39)[0x7f90998 21bb9] 64-linux- gnu/libc. so.6(abort+ 0x148)[ 0x7f9099824fc8] mysqld[ 0x98a2fb] mysqld[ 0xa9dfb5] mysqld[ 0x9f2d15] 64-linux- gnu/libpthread. so.0(+0x8182) [0x7f909a1c3182 ] 64-linux- gnu/libc. so.6(clone+ 0x6d)[0x7f90998 e5efd] www.percona. com/software/ percona- server/. You may find information
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 = 0 thread_stack 0x40000
/usr/sbin/
/usr/sbin/
/lib/x86_
/lib/x86_
/lib/x86_
/usr/sbin/
/usr/sbin/
/usr/sbin/
/lib/x86_
/lib/x86_
You may download the Percona Server operations manual by visiting
http://
in the manual which will help you identify the cause of the crash.
150924 11:13:07 mysqld_safe Number of processes running now: 0
150924 11:13:07 mysqld_safe mysqld restarted
However as specified in the reproducible case disk space wasnt a constraint. There was more than 100G space remaining on the mysql datadir volume.
Below is the my.cnf
[mysql]
port = 3306 mysql/var/ run/mysqld/ mysqld. sock
socket = /dbvol/
[mysqld]
user = mysql storage- engine = InnoDB mysql/var/ run/mysqld/ mysqld. sock mysql/var/ run/mysqld/ mysqld. pid
default-
socket = /dbvol/
pid-file = /dbvol/
key-buffer-size = 1G
myisam-recover = FORCE,BACKUP
max-allowed-packet = 512M
max-connect-errors = 1000000
datadir = /dbvol/ mysql/lib/ mysql/
binlog-format = STATEMENT mysql/lib/ mysql/mysql- bin
log-bin = /dbvol/
expire-logs-days = 21
sync-binlog = 1
read-only = 0 mysql/lib/ mysql/relay- bin
skip-slave-start = 1
log-slave-updates = 0
relay-log = /dbvol/
slave-net-timeout = 60
sync-master-info = 10000
sync-relay-log-info = 10000
server-id = 21300
tmp-table-size = 32M n-cache = 4096 cache-instances = 16
max-heap-table-size = 32M
query-cache-type = 0
max-connections = 1200
thread-cache-size = 600
open-files-limit = 65535
table-definitio
table-open-
table-open-cache = 1500
innodb-flush-method = O_DIRECT log-files- in-group = 2 log-file- size = 512M flush-log- at-trx- commit = 1 file-per- table = 1 buffer- pool-size = 180G log_buffer_ size = 32M buffer- pool-instances= 12
innodb-
innodb-
innodb-
innodb-
innodb-
innodb_
innodb-
innodb_io_capacity = 2000
innodb- flush-neighbors = 0
log-error = /dbvol/ mysql/log/ mysql-error. log not-using- indexes = 1 mysql/log/ mysql-slow. log log_use_ global_ control = log_slow_rate_limit
log-queries-
slow-query-log = 1
slow-query-log-file = /dbvol/
long_query_time = 5
slow_query_
log_slow_rate_limit = 100
The server doesnt have SWAP configured, would it be something which can also cause such an assertion ? There were OOM kill message either.
This has similar occurred on couple of other slaves with versions,
5.6.21-70.1-log Percona Server (GPL), Release 70.1, Revision 698
5.6.22-71.0-log Percona Server (GPL), Release 71.0, Revision 726