2019-08-02  2:50:33 0 [Warning] InnoDB: A long semaphore wait:

--Thread 140625894979328 has waited at buf0flu.cc line 1231 for 241.00 seconds the semaphore:

SX-lock on RW-latch at 0x7fe60bd76dc8 created in file buf0buf.cc line 1535

a writer (thread id 140625013896960) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: 0

Last time write locked in file trx0rseg.ic line 43

2019-08-02  2:50:33 0 [Note] InnoDB: A semaphore wait:

--Thread 140625894979328 has waited at buf0flu.cc line 1231 for 241.00 seconds the semaphore:

SX-lock on RW-latch at 0x7fe60bd76dc8 created in file buf0buf.cc line 1535

a writer (thread id 140625013896960) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: 0

Last time write locked in file trx0rseg.ic line 43

InnoDB: ###### Starts InnoDB Monitor for 30 secs to print diagnostic info:

InnoDB: Pending reads 0, writes 0

=====================================

2019-08-02 02:50:42 0x7fe5fe5f7700 INNODB MONITOR OUTPUT

=====================================

Per second averages calculated from the last 45 seconds

-----------------

BACKGROUND THREAD

-----------------

srv_master_thread loops: 51 srv_active, 0 srv_shutdown, 603 srv_idle

srv_master_thread log flush and writes: 654

----------

SEMAPHORES

----------

OS WAIT ARRAY INFO: reservation count 101760

--Thread 140625894979328 has waited at buf0flu.cc line 1231 for 250.00 seconds the semaphore:

SX-lock on RW-latch at 0x7fe60bd76dc8 created in file buf0buf.cc line 1535

a writer (thread id 140625013896960) has reserved it in mode  exclusive

number of readers 0, waiters flag 1, lock_word: 0

Last time write locked in file trx0rseg.ic line 43

OS WAIT ARRAY INFO: signal count 720134

RW-shared spins 0, rounds 1122008, OS waits 78681

RW-sx spins 17, rounds 504, OS waits 16

Spin rounds per wait: 1122008.00 RW-shared, 948606.00 RW-excl, 29.65 RW-sx

------------

TRANSACTIONS

------------

Trx id counter 312

Purge done for trx's n:o < 300 undo n:o < 52709166 state: running

History list length 9

LIST OF TRANSACTIONS FOR EACH SESSION:

---TRANSACTION 422101336969480, not started

0 lock struct(s), heap size 1136, 0 row lock(s)

--------

FILE I/O

--------

I/O thread 0 state: waiting for completed aio requests (insert buffer thread)

I/O thread 1 state: waiting for completed aio requests (log thread)

I/O thread 2 state: waiting for completed aio requests (read thread)

I/O thread 3 state: waiting for completed aio requests (read thread)

I/O thread 4 state: waiting for completed aio requests (read thread)

I/O thread 5 state: waiting for completed aio requests (read thread)

I/O thread 6 state: waiting for completed aio requests (write thread)

I/O thread 7 state: waiting for completed aio requests (write thread)

I/O thread 8 state: waiting for completed aio requests (write thread)

I/O thread 9 state: waiting for completed aio requests (write thread)

Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,

 ibuf aio reads:, log i/o's:, sync i/o's:

Pending flushes (fsync) log: 0; buffer pool: 1

209249 OS file reads, 120426 OS file writes, 11839 OS fsyncs

14.31 reads/s, 16384 avg bytes/read, 29.58 writes/s, 29.58 fsyncs/s

-------------------------------------

INSERT BUFFER AND ADAPTIVE HASH INDEX

-------------------------------------

Ibuf: size 1, free list len 0, seg size 2, 0 merges

merged operations:

 insert 0, delete mark 0, delete 0

discarded operations:

 insert 0, delete mark 0, delete 0

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 1332 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

Hash table size 34673, node heap has 0 buffer(s)

0.00 hash searches/s, 0.00 non-hash searches/s

---

LOG

---

Log sequence number 60399452025

Log flushed up to   60399451526

Pages flushed up to 60398943961

Last checkpoint at  60398943961

0 pending log flushes, 0 pending chkp writes

3694 log i/o's done, 0.93 log i/o's/second

----------------------

BUFFER POOL AND MEMORY

----------------------

Total large memory allocated 170852352

Dictionary memory allocated 31824

Buffer pool size   8191

Free buffers       0

Database pages     6859

Old database pages 2551

Modified db pages  2995

Percent of dirty pages(LRU & free pages): 43.659

Max dirty pages percent: 75.000

Pending reads 0

Pending writes: LRU 0, flush list 2, single page 1

Pages made young 446, not young 107542634

0.00 youngs/s, 42.93 non-youngs/s

Pages read 200593, created 849, written 110407

14.31 reads/s, 0.00 creates/s, 14.31 writes/s

Buffer pool hit rate 889 / 1000, young-making rate 0 / 1000 not 330 / 1000

Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s

LRU len: 6859, unzip_LRU len: 0

I/O sum[1428]:cur[266], unzip sum[0]:cur[0]

--------------

ROW OPERATIONS

--------------

0 queries inside InnoDB, 0 queries in queue

0 read views open inside InnoDB

Process ID=6282, Main thread ID=140625766729472, state: sleeping

Number of rows inserted 0, updated 0, deleted 0, read 0

0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s

Number of system rows inserted 0, updated 0, deleted 0, read 0

0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s

----------------------------

END OF INNODB MONITOR OUTPUT

============================

...

lots more from INNODB MONITOR OUTPUT included in crash.log attached

...

InnoDB: ###### Diagnostic info printed to the standard error stream

2019-08-02  9:34:31 0 [ERROR] [FATAL] InnoDB: Semaphore wait has lasted > 600 seconds. We intentionally crash the server because it appears

to be hung.

190802  9:34:31 [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 https://mariadb.com/kb/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: 10.3.16-MariaDB

key_buffer_size=134217728

read_buffer_size=131072

max_used_connections=2

max_threads=153

thread_count=8

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 467420 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 = 0x0 thread_stack 0x49000

/usr/libexec/mysqld(my_print_stacktrace+0x41)[0x556cb047dcf1]

/usr/libexec/mysqld(handle_fatal_signal+0x4e5)[0x556caff653d5]

/lib64/libpthread.so.0(+0x12e80)[0x7f8621d21e80]

/lib64/libc.so.6(gsignal+0x145)[0x7f862183fe75]

/lib64/libc.so.6(abort+0x127)[0x7f862182a895]

/usr/libexec/mysqld(+0x4c1b45)[0x556cafc8eb45]

/usr/libexec/mysqld(+0xa3fd5a)[0x556cb020cd5a]

/lib64/libpthread.so.0(+0x85a2)[0x7f8621d175a2]

/lib64/libc.so.6(clone+0x43)[0x7f8621903303]

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.

Writing a core file...

Working directory at /raid/mysql

Resource Limits:

Fatal signal 11 while backtracing

2019-08-02  9:34:41 0 [Note] InnoDB: Using Linux native AIO

2019-08-02  9:34:41 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2019-08-02  9:34:41 0 [Note] InnoDB: Uses event mutexes

2019-08-02  9:34:41 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

2019-08-02  9:34:41 0 [Note] InnoDB: Number of pools: 1

2019-08-02  9:34:41 0 [Note] InnoDB: Using SSE2 crc32 instructions

2019-08-02  9:34:41 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M

2019-08-02  9:34:41 0 [Note] InnoDB: Completed initialization of buffer pool

2019-08-02  9:34:41 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().

2019-08-02  9:34:41 0 [Note] InnoDB: Starting crash recovery from checkpoint LSN=65739376432

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928437] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928438] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928439] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928440] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928441] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928442] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928443] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928444] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928445] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928446] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928447] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928448] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928449] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928450] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928451] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928452] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928453] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928454] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928455] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928456] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928457] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928458] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928459] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928460] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928461] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928462] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928463] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928464] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928465] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928466] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928467] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928468] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928469] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928470] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928471] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928472] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928473] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928474] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928475] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928476] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928477] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928478] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928479] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928480] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928481] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928482] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928483] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928484] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928485] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928486] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928487] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928488] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928471] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928472] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928473] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928474] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928475] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928476] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928477] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928478] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928479] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928480] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928481] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928482] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928483] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928484] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928485] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928486] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928487] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928488] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928489] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928490] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928491] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Recovered page [page id: space=5, page number=1928492] from the doublewrite buffer.

2019-08-02  9:34:42 0 [Note] InnoDB: Starting final batch to recover 13936 pages from redo log.

2019-08-02  9:34:49 0 [Note] InnoDB: 128 out of 128 rollback segments are active.

2019-08-02  9:34:49 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"

2019-08-02  9:34:49 0 [Note] InnoDB: Creating shared tablespace for temporary tables

2019-08-02  9:34:49 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...

2019-08-02  9:34:49 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.

2019-08-02  9:34:49 0 [Note] InnoDB: 10.3.16 started; log sequence number 65739376471; transaction id 327

2019-08-02  9:34:49 0 [Note] InnoDB: Loading buffer pool(s) from /raid/mysql/ib_buffer_pool

2019-08-02  9:34:49 0 [Note] Plugin 'FEEDBACK' is disabled.

2019-08-02  9:34:49 0 [Note] Recovering after a crash using tc.log

2019-08-02  9:34:49 0 [Note] Starting crash recovery...

2019-08-02  9:34:49 0 [Note] Crash recovery finished.

2019-08-02  9:34:49 0 [Note] Server socket created on IP: '::'.

2019-08-02  9:34:49 0 [Note] InnoDB: Buffer pool(s) load completed at 190802  9:34:49

2019-08-02  9:34:49 0 [Note] Reading of all Master_info entries succeeded

2019-08-02  9:34:49 0 [Note] Added new Master_info '' to hash table

2019-08-02  9:34:49 0 [Note] /usr/libexec/mysqld: ready for connections.

Version: '10.3.16-MariaDB'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  MariaDB Server