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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()
17 lines
540 B
Text
17 lines
540 B
Text
#
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# MDEV-22370 safe_mutex: Trying to lock uninitialized mutex at
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# /data/src/10.4-bug/sql/rpl_parallel.cc, line 470 upon shutdown during FTWRL
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#
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# Purpose of this test case to test crash while FTWRL and shutdown is in race
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# condition
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# Shutdown can execute first and destroy the mutex making mutex_lock in pool_mark_busy
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# to crash
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--source include/have_debug.inc
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--connect (con1,localhost,root,,)
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SET DEBUG_DBUG='+d,mark_busy_mdev_22370';
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--send
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FLUSH TABLES WITH READ LOCK;
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--connection default
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--source include/restart_mysqld.inc
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