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370318f894
The direct cause of the assertion was missing error handling in record_gtid(). If ha_commit_trans() fails for the statement commit, there was missing code to catch the error and do ha_rollback_trans() in this case; this caused close_thread_tables() to assert. Normally, this error case is not hit, but in this case it was triggered due to another bug: When a transaction T1 fails during parallel replication, the code would signal following transactions that they could start to run without properly marking the error condition. This caused subsequent transactions to incorrectly start replicating, only to get an error later during their own commit step. This was particularly serious if the subsequent transactions were DDL or MyISAM updates, which cannot be rolled back and would leave replication in an inconsistent state. Fixed by 1) in case of error, only signal following transactions to continue once the error has been properly marked and those transactions will know not to start; and 2) implement proper error handling in record_gtid() in the case that statement commit fails.
57 lines
1.2 KiB
Plaintext
57 lines
1.2 KiB
Plaintext
include/master-slave.inc
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[connection master]
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ALTER TABLE mysql.gtid_slave_pos ENGINE = InnoDB;
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FLUSH LOGS;
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CREATE TABLE t1 (a INT PRIMARY KEY, b INT) Engine=InnoDB;
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include/stop_slave.inc
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SET sql_log_bin= 0;
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INSERT INTO t1 VALUES (1, 2);
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SET sql_log_bin= 1;
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CHANGE MASTER TO master_use_gtid= current_pos;
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Contents on slave before:
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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SET @old_parallel= @@GLOBAL.slave_parallel_threads;
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SET GLOBAL slave_parallel_threads=8;
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CREATE TEMPORARY TABLE t2 LIKE t1;
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INSERT INTO t2 VALUE (1, 1);
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INSERT INTO t2 VALUE (2, 1);
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INSERT INTO t2 VALUE (3, 1);
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INSERT INTO t2 VALUE (4, 1);
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INSERT INTO t2 VALUE (5, 1);
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INSERT INTO t1 SELECT * FROM t2;
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DROP TEMPORARY TABLE t2;
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Contents on master:
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SELECT * FROM t1 ORDER BY a;
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a b
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1 1
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2 1
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3 1
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4 1
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5 1
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START SLAVE;
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include/wait_for_slave_sql_error.inc [errno=1062]
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STOP SLAVE IO_THREAD;
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Contents on slave on slave error:
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SELECT * FROM t1 ORDER BY a;
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a b
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1 2
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SET sql_log_bin= 0;
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DELETE FROM t1 WHERE a=1;
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SET sql_log_bin= 1;
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include/start_slave.inc
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Contents on slave after:
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SELECT * FROM t1 ORDER BY a;
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a b
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1 1
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2 1
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3 1
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4 1
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5 1
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DROP TABLE t1;
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include/stop_slave.inc
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SET GLOBAL slave_parallel_threads= @old_parallel;
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include/start_slave.inc
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include/rpl_end.inc
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