mariadb/mysql-test/main/mdev_22370.result
Sachin 592a10d079 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()
2020-06-17 02:22:46 +05:30

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connect con1,localhost,root,,;
SET DEBUG_DBUG='+d,mark_busy_mdev_22370';
FLUSH TABLES WITH READ LOCK;
connection default;
# restart