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MDEV-7936: Assertion `!table || table->in_use == _current_thd()' failed on parallel replication in optimistic mode

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Make sure that in parallel replication, we execute wait_for_prior_commit()
before setting table->in_use for a temporary table. Otherwise we can end up
with two parallel replication worker threads competing with each other for
use of a temporary table.

Re-factor the use of find_temporary_table() to be able to handle errors
in the caller (as wait_for_prior_commit() can return error in case of
deadlock kill).
This commit is contained in:
Kristian Nielsen
2015-04-13 09:52:56 +02:00
parent c47fe0e9db
commit 60d094aeac
5 changed files with 116 additions and 41 deletions
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20
mysql-test/suite/rpl/r/rpl_parallel_temptable.result
View File

@@ -116,6 +116,26 @@ SHOW STATUS LIKE 'Slave_open_temp_tables';
Variable_name Value
Slave_open_temp_tables 0
FLUSH LOGS;
*** MDEV-7936: Assertion `!table || table->in_use == _current_thd()' failed on parallel replication in optimistic mode ***
CREATE TEMPORARY TABLE t4 (a INT PRIMARY KEY) ENGINE=InnoDB;
SET @old_dbug= @@SESSION.debug_dbug;
SET SESSION debug_dbug="+d,binlog_force_commit_id";
SET @commit_id= 10000;
INSERT INTO t4 VALUES (30);
INSERT INTO t4 VALUES (31);
SET SESSION debug_dbug= @old_dbug;
INSERT INTO t1 SELECT a, "conservative" FROM t4;
DROP TEMPORARY TABLE t4;
SELECT * FROM t1 WHERE a >= 30 ORDER BY a;
a b
30 conservative
31 conservative
include/save_master_pos.inc
include/sync_with_master_gtid.inc
SELECT * FROM t1 WHERE a >= 30 ORDER BY a;
a b
30 conservative
31 conservative
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc