diff options
Diffstat (limited to 'mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test')
| -rw-r--r-- | mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test | 99 |
1 files changed, 98 insertions, 1 deletions
diff --git a/mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test b/mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test index 0756caca084..da1a07d3b87 100644 --- a/mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test +++ b/mysql-test/suite/rpl/t/rpl_parallel_gtid_slave_pos_update_fail.test @@ -1 +1,98 @@ ---source include/rpl_parallel_gtid_slave_pos_update_fail.inc +# MDEV-6549, failing to update gtid_slave_pos for a transaction that was retried. + +# The problem was that when a transaction updates the mysql.gtid_slave_pos +# table, it clears the flag that marks that there is a GTID position that +# needs to be updated. Then, if the transaction got killed after that due +# to a deadlock, the subsequent retry would fail to notice that the GTID needs +# to be recorded in gtid_slave_pos. +# +# (In the original bug report, the symptom was an assertion; this was however +# just a side effect of the missing update of gtid_slave_pos, which also +# happened to cause a missing clear of OPTION_GTID_BEGIN). +--source include/have_innodb.inc +--source include/have_debug.inc +--source include/have_debug_sync.inc +# Must use statement-based binlogging. Otherwise the transaction will not be +# binlogged at all, as it modifies no rows. +--source include/have_binlog_format_statement.inc +--source include/master-slave.inc + +--connection server_2 +SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads; +--source include/stop_slave.inc +SET GLOBAL slave_parallel_threads=10; +CHANGE MASTER TO master_use_gtid=slave_pos; +--source include/start_slave.inc + +--connection server_1 +ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB; +CREATE TABLE t4 (a INT PRIMARY KEY, b INT, KEY b_idx(b)) ENGINE=InnoDB; +INSERT INTO t4 VALUES (1,NULL), (2,2), (3,NULL), (4,4), (5, NULL), (6, 6); +--connect (con1,127.0.0.1,root,,test,$SERVER_MYPORT_1,) +--connect (con2,127.0.0.1,root,,test,$SERVER_MYPORT_1,) +--save_master_pos + +--connection server_2 +--sync_with_master +--source include/stop_slave.inc + +# Create two transactions that can run in parallel on the slave but cause +# a deadlock if the second runs before the first. +--connection con1 +SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1'; +send UPDATE t4 SET b=NULL WHERE a=6; +--connection server_1 +SET debug_sync='now WAIT_FOR master_queued1'; + +--connection con2 +SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2'; +send DELETE FROM t4 WHERE b <= 1; + +--connection server_1 +SET debug_sync='now WAIT_FOR master_queued2'; +SET debug_sync='now SIGNAL master_cont1'; + +--connection con1 +REAP; +--connection con2 +REAP; +SET debug_sync='RESET'; +--save_master_pos +--let $last_gtid= `SELECT @@last_gtid` + +--connection server_2 +# Disable the usual skip of gap locks for transactions that are run in +# parallel, using DBUG. This allows the deadlock to occur, and this in turn +# triggers a retry of the second transaction, and the code that was buggy and +# caused the gtid_slave_pos update to be skipped in the retry. +SET @old_dbug= @@GLOBAL.debug_dbug; +SET GLOBAL debug_dbug="+d,disable_thd_need_ordering_with"; +--source include/start_slave.inc +--sync_with_master +SET GLOBAL debug_dbug=@old_dbug; + +SELECT * FROM t4 ORDER BY a; +# Check that the GTID of the second transaction was correctly recorded in +# gtid_slave_pos, in the variable as well as in the table. +--replace_result $last_gtid GTID +eval SET @last_gtid= '$last_gtid'; +SELECT IF(@@gtid_slave_pos LIKE CONCAT('%',@last_gtid,'%'), "GTID found ok", + CONCAT("GTID ", @last_gtid, " not found in gtid_slave_pos=", @@gtid_slave_pos)) + AS result; +SELECT "ROW FOUND" AS `Is the row found?` + FROM mysql.gtid_slave_pos + WHERE CONCAT(domain_id, "-", server_id, "-", seq_no) = @last_gtid; + +# Clean up. +--connection server_2 +--source include/stop_slave.inc +SET GLOBAL slave_parallel_threads=@old_parallel_threads; +--source include/start_slave.inc +SET DEBUG_SYNC= 'RESET'; + +--connection server_1 +DROP TABLE t4; +SET DEBUG_SYNC= 'RESET'; +--disconnect con1 +--disconnect con2 +--source include/rpl_end.inc |