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137 lines
4 KiB
Text
137 lines
4 KiB
Text
# ==== Purpose ====
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#
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# This test will generate two XA transactions on the master in a way that
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# they will block each other on the slave if the transaction isolation level
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# used by the slave applier is more restrictive than the READ COMMITTED one.
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#
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# Consider:
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# E=execute, P=prepare, C=commit;
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# 1=first transaction, 2=second transaction;
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#
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# Master does: E1, E2, P2, P1, C1, C2
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# Slave does: E2, P2, E1, P1, C1, C2
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#
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# The transactions are designed so that, if the applier transaction isolation
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# level is more restrictive than the READ COMMITTED, E1 will be blocked on
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# the slave waiting for gap locks to be released.
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#
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# Step 1
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#
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# The test will verify that the transactions don't block each other because
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# the applier thread automatically changed the isolation level.
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#
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# Step 2
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#
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# The test will verify that applying master's binary log dump in slave doesn't
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# block because mysqlbinlog is informing the isolation level to be used.
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#
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# ==== Related Bugs and Worklogs ====
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#
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# BUG#25040331: INTERLEAVED XA TRANSACTIONS MAY DEADLOCK SLAVE APPLIER WITH
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# REPEATABLE READ
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#
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--source include/have_debug.inc
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--source include/have_innodb.inc
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# The test case only make sense for RBR
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--source include/have_binlog_format_row.inc
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--source include/master-slave.inc
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--connection slave
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# To hit the issue, we need to split the data in two pages.
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# This global variable will help us.
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SET @saved_innodb_limit_optimistic_insert_debug = @@GLOBAL.innodb_limit_optimistic_insert_debug;
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SET @@GLOBAL.innodb_limit_optimistic_insert_debug = 2;
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#
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# Step 1 - Using async replication
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#
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# Let's generate the workload on the master
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--connection master
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CREATE TABLE t1 (
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c1 INT NOT NULL,
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KEY(c1)
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) ENGINE=InnoDB;
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CREATE TABLE t2 (
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c1 INT NOT NULL,
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FOREIGN KEY(c1) REFERENCES t1(c1)
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) ENGINE=InnoDB;
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INSERT INTO t1 VALUES (1), (3), (4);
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--connection master1
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XA START 'XA1';
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INSERT INTO t1 values(2);
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XA END 'XA1';
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# This transaction will reference the gap where XA1
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# was inserted, and will be prepared and committed
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# before XA1, so the slave will prepare it (but will
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# not commit it) before preparing XA1.
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--connection master
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XA START 'XA2';
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INSERT INTO t2 values(3);
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XA END 'XA2';
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# The XA2 prepare should be binary logged first
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XA PREPARE 'XA2';
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# The XA1 prepare should be binary logged
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# after XA2 prepare and before XA2 commit.
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--connection master1
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XA PREPARE 'XA1';
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# The commit order doesn't matter much for the issue being tested.
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XA COMMIT 'XA1';
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--connection master
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XA COMMIT 'XA2';
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# Everything is fine if the slave can sync with the master.
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--source include/sync_slave_sql_with_master.inc
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#
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# Step 2 - Using mysqlbinlog dump to restore the slave
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#
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--source include/stop_slave.inc
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DROP TABLE t2, t1;
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RESET SLAVE;
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RESET MASTER;
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--connection master
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--let $master_data_dir= `SELECT @@datadir`
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--let $master_log_file= query_get_value(SHOW MASTER STATUS, File, 1)
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--let $mysql_server= $MYSQL --defaults-group-suffix=.2
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--echo Restore binary log from the master into the slave
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--exec $MYSQL_BINLOG --force-if-open $master_data_dir/$master_log_file | $mysql_server
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--let $diff_tables= master:test.t1, slave:test.t1
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--source include/diff_tables.inc
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--let $diff_tables= master:test.t2, slave:test.t2
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--source include/diff_tables.inc
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#
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# Cleanup
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#
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--let $master_file= query_get_value(SHOW MASTER STATUS, File, 1)
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--let $master_pos= query_get_value(SHOW MASTER STATUS, Position, 1)
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DROP TABLE t2, t1;
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## When GTID_MODE=OFF, we need to skip already applied transactions
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--connection slave
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#--let $gtid_mode= `SELECT @@GTID_MODE`
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#if ($gtid_mode == OFF)
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#{
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# --disable_query_log
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# --disable_result_log
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# --eval CHANGE MASTER TO MASTER_LOG_FILE='$master_file', MASTER_LOG_POS=$master_pos
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# --enable_result_log
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# --enable_query_log
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#}
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--replace_result $master_file LOG_FILE $master_pos LOG_POS
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--eval CHANGE MASTER TO MASTER_LOG_FILE='$master_file', MASTER_LOG_POS=$master_pos, MASTER_USE_GTID=NO
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SET @@GLOBAL.innodb_limit_optimistic_insert_debug = @saved_innodb_limit_optimistic_insert_debug;
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--source include/start_slave.inc
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--source include/rpl_end.inc
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