InnoDB: Server crashed, waited at ha_innodb.cc line 10727

InnoDB: Error: semaphore wait has lasted > 600 seconds

InnoDB: We intentionally crash the server, because it appears to be hung.

201021 11:22:35  InnoDB: Assertion failure in thread 140591196018432 in file srv0srv.c line 2917

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.

201021 11:22:35 [ERROR] 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.

To report this bug, see http://kb.askmonty.org/en/reporting-bugs

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.

Server version: 5.5.31-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=53

max_threads=102

thread_count=34

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 354822 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x0

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 = 0x0 thread_stack 0x48000

mysys/stacktrace.c:247(my_print_stacktrace)[0x9ed87b]

sql/signal_handler.cc:153(handle_fatal_signal)[0x6b8828]

??:0(??)[0x7ff83738a0a0]

??:0(??)[0x7ff836027125]

??:0(??)[0x7ff83602a3a0]

srv/srv0srv.c:2974(srv_error_monitor_thread)[0x810e33]

??:0(??)[0x7ff837381b50]

??:0(??)[0x7ff8360d2fbd]

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.

201021 11:26:06 mysqld_safe Number of processes running now: 0

201021 11:26:06 mysqld_safe mysqld restarted

201021 11:26:06 InnoDB: The InnoDB memory heap is disabled

201021 11:26:06 InnoDB: Mutexes and rw_locks use GCC atomic builtins

201021 11:26:06 InnoDB: Compressed tables use zlib 1.2.7

201021 11:26:07 InnoDB: Initializing buffer pool, size = 100.0G

201021 11:26:12 InnoDB: Completed initialization of buffer pool

201021 11:26:12 InnoDB: highest supported file format is Barracuda.

InnoDB: Log scan progressed past the checkpoint lsn 536256807427273

201021 11:26:13  InnoDB: Database was not shut down normally!

InnoDB: Starting crash recovery.