mariadb/mysql-test/main/mdev_22370.result

connect  con1,localhost,root,,;
SET DEBUG_DBUG='+d,mark_busy_mdev_22370';
FLUSH TABLES WITH READ LOCK;
connection default;
# restart
MDEV-22370 safe_mutex: Trying to lock uninitialized mutex at /data/src/10.4-bug/sql/rpl_parallel.cc, line 470 upon shutdown during FTWRL Problem:- When we issue FTWRL with shutdown in parallel, there is race between FTWRL and shutdown. Shutdown might destroy the mutex (pool->LOCK_rpl_thread_pool) before FTWRL can lock it. So we can get crash on FTWRL thread Solution:- mysql_mutex_destroy(pool->LOCK_rpl_thread_pool) should wait for FTWRL thread to complete its work , and then destroy. So slave_prepare_for_shutdown will just deactivate the pool, and mutex is destroyed later in end_slave() 2020-05-22 22:44:37 +05:30			`connect con1,localhost,root,,;`
			`SET DEBUG_DBUG='+d,mark_busy_mdev_22370';`
			`FLUSH TABLES WITH READ LOCK;`
			`connection default;`
			`# restart`