Semaphore wait has lasted > 600 seconds

2020-12-09 13:19:29 0 [Note] InnoDB: A semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 607.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

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

InnoDB: Pending reads 1, writes 0

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

2020-12-09 13:19:30 0 [Warning] InnoDB: A long semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 608.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

2020-12-09 13:19:30 0 [Note] InnoDB: A semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 608.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

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

InnoDB: Pending reads 1, writes 0

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

2020-12-09 13:19:31 0 [Warning] InnoDB: A long semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 609.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

2020-12-09 13:19:31 0 [Note] InnoDB: A semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 609.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

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

InnoDB: Pending reads 1, writes 0

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

2020-12-09 13:19:32 0 [Warning] InnoDB: A long semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 610.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

2020-12-09 13:19:32 0 [Note] InnoDB: A semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 610.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

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

InnoDB: Pending reads 0, writes 0

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

2020-12-09 13:19:33 0 [Warning] InnoDB: A long semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 611.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

2020-12-09 13:19:33 0 [Note] InnoDB: A semaphore wait:

--Thread 139977950762752 has waited at btr0cur.cc line 1480 for 611.00 seconds the semaphore:

SX-lock on RW-latch at 0x7f4b3b32c160 created in file dict0dict.cc line 2160

a writer (thread id 139963135923968) has reserved it in mode  SX

number of readers 0, waiters flag 1, lock_word: 10000000

Last time write locked in file dict0stats.cc line 1969

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

InnoDB: Pending reads 1, writes 0

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

2020-12-09 13:19:33 0 [ERROR] [FATAL] InnoDB: Semaphore wait has lasted > 600 seconds. We intentionally crash the server because it appears to be hung.

201209 13:19:33 [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: 10.5.8-MariaDB-1:10.5.8+maria~focal-log

key_buffer_size=2147483648

read_buffer_size=20971520

max_used_connections=6

max_threads=1002

thread_count=5

It is possible that mysqld could use up to

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 547980111 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

mysqld(my_print_stacktrace+0x32)[0x55ea24b5c692]

mysqld(handle_fatal_signal+0x485)[0x55ea245b3e45]