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Problem : The basic problem is the way the thread sleeps in mysql-5.5 and also in mysql-5.1
when we execute a stop slave on windows platform.
On windows platform if the stop slave is executed after the master dies, we have
this long wait before the stop slave return a value. This is because there is a
sleep of the thread. The sleep is uninterruptable in the two above version,
which was fixed by Davi patch for the BUG#11765860 for mysql-trunk. Backporting
his patch for mysql-5.5 fixes the problem.
Solution : A new pair of mutex and condition variable is introduced to synchronize thread
sleep and finalization. A new mutex is required because the slave threads are
terminated while holding the slave thread locks (run_lock), which can not be
relinquished during termination as this would affect the lock order.
11 lines
333 B
Plaintext
11 lines
333 B
Plaintext
include/master-slave.inc
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[connection master]
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set @time_before_kill := (select CURRENT_TIMESTAMP);
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[Time before the query]
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[Connection ID of the slave I/O thread found]
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kill <connection_id>;
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set @time_after_kill := (select CURRENT_TIMESTAMP);
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[Time after the query]
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[Killing of the slave IO thread was successful]
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include/rpl_end.inc
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