[Koha] INTERNAL SYSTEM ERROR

[Shafendi]

here is my mysql error log

2019-03-09 12:00:35 140561744152320 [Note] /usr/sbin/mysqld: Normal shutdown
2019-03-09 12:00:36 140561744152320 [Note] Event Scheduler: Purging the
queue. 0 events
2019-03-09 12:00:36 140561184954112 [Note] InnoDB: FTS optimize thread
exiting.
2019-03-09 12:00:36 140561744152320 [Note] InnoDB: Starting shutdown...
2019-03-09 12:00:36 140561744152320 [Note] InnoDB: Waiting for page_cleaner
to finish flushing of buffer pool
2019-03-09 12:00:38 140561744152320 [Note] InnoDB: Shutdown completed; log
sequence number 12224433643
2019-03-09 12:00:38 140561744152320 [Note] /usr/sbin/mysqld: Shutdown
complete

2019-03-09 12:00:39 140048342834560 [Note] InnoDB:
innodb_empty_free_list_algorithm has been changed to legacy because of small
buffer pool size. In order to use backoff, increase buffer pool at least up
to 20MB.

2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Using mutexes to ref
count buffer pool pages
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: The InnoDB memory heap is
disabled
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Mutexes and rw_locks use
GCC atomic builtins
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: GCC builtin
__atomic_thread_fence() is used for memory barrier
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Compressed tables use
zlib 1.2.8
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Using Linux native AIO
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Using generic crc32
instructions
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Initializing buffer pool,
size = 128.0M
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Completed initialization
of buffer pool
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Highest supported file
format is Barracuda.
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: 128 rollback segment(s)
are active.
2019-03-09 12:00:39 140048342834560 [Note] InnoDB: Waiting for purge to
start
2019-03-09 12:00:39 140048342834560 [Note] InnoDB:  Percona XtraDB
(http://www.percona.com) 5.6.41-84.1 started; log sequence number
12224433643
2019-03-09 12:00:40 140047420487424 [Note] InnoDB: Dumping buffer pool(s)
not yet started
2019-03-09 12:00:40 140048342834560 [Note] Plugin 'FEEDBACK' is disabled.
2019-03-09 12:00:40 140048342834560 [Note] Server socket created on IP:
'0.0.0.0'.
2019-03-09 12:00:40 140048342834560 [Note] /usr/sbin/mysqld: ready for
connections.
Version: '10.1.37-MariaDB-0+deb9u1'  socket: '/var/run/mysqld/mysqld.sock' 
port: 3306  Debian 9.6
2019-03-09 20:52:15 140048341997312 [Warning] IP address '10.116.12.207'
could not be resolved: Name or service not known




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