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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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e2ac8c07bd
The reason for the crash was rotate_relay_log (mi=0x0) did not verify
the passed value of active_mi. There are more cases where active_mi
is supposed to be non-zero e.g change_master(), stop_slave(), and it's
reasonable to protect from a similar crash all of them with common
fixes.
Fixed with spliting end_slave() in slave threads release and slave
data clean-up parts (a new close_active_mi()). The new function is
invoked at the very end of close_connections() so that all users of
active_mi are proven to have left.
sql/mysqld.cc:
added the 2nd part (data) of the slave's clean up.
sql/slave.cc:
end_slave() is split in two part to release the slave threads and the remained
resources separately.
The new close_active_mi() should be called after all possible users ofactive_mi
has left, i.e at the very end of close_connections().
sql/slave.h:
interface to the new end_active_mi() function is added.
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