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MDEV-5788: Incorrect free of rgi->deferred_events in parallel replication

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When an rpl_group_info object was returned from the free list, the
rgi->deferred_events_collecting and rgi->deferred_events was not correctly
re-inited. Additionally, the rgi->deferred_events was incorrectly freed in
free_rgi(), which causes unnecessary malloc/free (or crash when re-init is not
done).

Thanks to user nanyi607rao, who reported this bug on maria-developers@.
This commit is contained in:
unknown
2014-03-07 12:02:09 +01:00
parent fe3c68b38d
commit 2aa619ec68
3 changed files with 64 additions and 7 deletions
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41
mysql-test/suite/rpl/t/rpl_parallel.test
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@ -1069,6 +1069,47 @@ SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
--source include/start_slave.inc
--echo *** MDEV-5788 Incorrect free of rgi->deferred_events in parallel replication ***
--connection server_2
# Use just two worker threads, so we are sure to get the rpl_group_info added
# to the free list, which is what triggered the bug.
--source include/stop_slave.inc
SET GLOBAL replicate_ignore_table="test.t3";
SET GLOBAL slave_parallel_threads=2;
--source include/start_slave.inc
--connection server_1
INSERT INTO t3 VALUES (100, rand());
INSERT INTO t3 VALUES (101, rand());
--save_master_pos
--connection server_2
--sync_with_master
--connection server_1
INSERT INTO t3 VALUES (102, rand());
INSERT INTO t3 VALUES (103, rand());
INSERT INTO t3 VALUES (104, rand());
INSERT INTO t3 VALUES (105, rand());
--connection server_2
--sync_with_master
--source include/stop_slave.inc
SET GLOBAL replicate_ignore_table="";
--source include/start_slave.inc
--connection server_1
INSERT INTO t3 VALUES (106, rand());
INSERT INTO t3 VALUES (107, rand());
--save_master_pos
--connection server_2
--sync_with_master
--replace_column 2 #
SELECT * FROM t3 WHERE a >= 100 ORDER BY a;
--connection server_2
--source include/stop_slave.inc