82 lines
3.1 KiB
Plaintext
82 lines
3.1 KiB
Plaintext
################################################################################
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# BUG#25379659 MASTER MAY BINLOG A WRONG LAST_COMMITED
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#
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# Transactions could binlog a last_commited smaller than expected. With the
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# wrong last_commited values, the transactions which sould be applied
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# sequentially could be applied parallel. That caused applier errors or data
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# inconsistency.
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#
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# When committing a transaction, its last_commited is set to the value of
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# max_committed_transaction. max_committed_transaction is the maximum
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# sequence_number of committed transactions. It is maintained just before
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# committing each transaction to engine. If its sequence_number is not
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# SEQ_UNINIT then updates max_committed_transaction accordingly.
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#
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# However, it checked wrong sequence_number(the sequence_number of the
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# leader thread's transaction instead of the sequence_number of the transaction).
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# That caused that max_committed_transaction was only updated in time for leader
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# thread's transaction. The update for following transactions were delay to
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# finish_commit() which was after the transaction commited to engine.
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#
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# The test verifys last_committed is corret in the bug situation.
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#
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# Step 1. Use debug sync to gurantee that commit queue has two transactions.
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# Step 2. Use debug sync to pause the second transaction when it enters
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# finshi_commit()
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# Step 3. Execute a transaction and check if its last_committed is correct.
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################################################################################
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--source include/have_binlog_format_statement.inc
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--source include/have_debug_sync.inc
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# Reset sequence_number and last_committed, so we can check the exact number
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# Make sure it starts from binlog.000001
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RESET MASTER;
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CREATE TABLE t1(c1 INT PRIMARY KEY, c2 INT) ENGINE = InnoDB;
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# Make the INSERT to wait for another INSERT into the flush queue
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SET DEBUG_SYNC = "bgc_after_enrolling_for_commit_stage
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SIGNAL insert1_ready WAIT_FOR continue_commit_stage";
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--send INSERT INTO t1 VALUES(1, 1)
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--connect(conn1, localhost, root)
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--connect(conn2, localhost, root)
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--connection conn1
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# Make sure above INSERT is the leader
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SET DEBUG_SYNC = "now WAIT_FOR insert1_ready";
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# Record the INSERT's binlog position
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--let $binlog_pos= query_get_value(SHOW MASTER STATUS, Position, 1)
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# Pause the INSERT when it enters finishi_commit()
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SET DEBUG_SYNC = "reached_finish_commit WAIT_FOR insert2_finish";
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--send INSERT INTO t1 VALUES(2, 1)
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# Wait until above INSERT is binlogged
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--connection conn2
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--let $show_statement= SHOW MASTER STATUS
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--let $field= Position
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--let $condition= != '$binlog_pos'
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--source include/wait_show_condition.inc
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# Signal insert1 to finish the commit group
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SET DEBUG_SYNC = "now SIGNAL continue_commit_stage";
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--connection default
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--reap
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UPDATE t1 SET c2 = 2 WHERE c1 = 2;
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SET DEBUG_SYNC = "now SIGNAL insert2_finish";
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--connection conn1
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--reap
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--connection default
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# INSERT(2,1): sequence_number = 3
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# UPDATE: sequence_number = 4, last_committed = 3
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--let $binlog_file= binlog.000001
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--let $logical_timestamps= 3 4
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--source include/assert_logical_timestamps.inc
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DROP TABLE t1;
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