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d02d52629d
The problem was that connection con5, which is supposed to be the leader for the third group, could if timing was bad end up as participant in the second group, causing the test to fail. Fixed by ensuring that group 2 is running before starting the transaction for group 3.
118 lines
3.8 KiB
Plaintext
118 lines
3.8 KiB
Plaintext
--source include/have_debug_sync.inc
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--source include/have_innodb_plugin.inc
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--source include/have_log_bin.inc
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# Test some group commit code paths by using debug_sync to do controlled
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# commits of 6 transactions: first 1 alone, then 3 as a group, then 2 as a
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# group.
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#
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# Group 3 is allowed to race as far as possible ahead before group 2 finishes
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# to check some edge case for concurrency control.
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CREATE TABLE t1 (a VARCHAR(10) PRIMARY KEY) ENGINE=innodb;
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SELECT variable_value INTO @commits FROM information_schema.global_status
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WHERE variable_name = 'binlog_commits';
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SELECT variable_value INTO @group_commits FROM information_schema.global_status
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WHERE variable_name = 'binlog_group_commits';
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connect(con1,localhost,root,,);
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connect(con2,localhost,root,,);
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connect(con3,localhost,root,,);
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connect(con4,localhost,root,,);
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connect(con5,localhost,root,,);
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connect(con6,localhost,root,,);
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# Start group1 (with one thread) doing commit, waiting for
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# group2 to queue up before finishing.
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connection con1;
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SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group1_running WAIT_FOR group2_queued";
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send INSERT INTO t1 VALUES ("con1");
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# Make group2 (with three threads) queue up.
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# Make sure con2 is the group commit leader for group2.
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# Make group2 wait with running commit_ordered() until group3 has committed.
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connection con2;
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set DEBUG_SYNC= "now WAIT_FOR group1_running";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con2";
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SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group2_running";
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SET DEBUG_SYNC= "commit_after_release_LOCK_log WAIT_FOR group3_committed";
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SET DEBUG_SYNC= "commit_after_group_run_commit_ordered SIGNAL group2_visible WAIT_FOR group2_checked";
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send INSERT INTO t1 VALUES ("con2");
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connection con3;
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SET DEBUG_SYNC= "now WAIT_FOR group2_con2";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con3";
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send INSERT INTO t1 VALUES ("con3");
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connection con4;
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SET DEBUG_SYNC= "now WAIT_FOR group2_con3";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL group2_con4";
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send INSERT INTO t1 VALUES ("con4");
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# When group2 is queued, let group1 continue and queue group3.
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR group2_con4";
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# At this point, trasaction 1 is still not visible as commit_ordered() has not
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# been called yet.
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SELECT * FROM t1 ORDER BY a;
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SET DEBUG_SYNC= "now SIGNAL group2_queued";
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connection con1;
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reap;
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# Now transaction 1 is visible.
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connection default;
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SELECT * FROM t1 ORDER BY a;
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connection con5;
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SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL group3_con5";
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SET DEBUG_SYNC= "commit_after_get_LOCK_log SIGNAL con5_leader WAIT_FOR con6_queued";
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set DEBUG_SYNC= "now WAIT_FOR group2_running";
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send INSERT INTO t1 VALUES ("con5");
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connection con6;
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SET DEBUG_SYNC= "now WAIT_FOR con5_leader";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL con6_queued";
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send INSERT INTO t1 VALUES ("con6");
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connection default;
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SET DEBUG_SYNC= "now WAIT_FOR group3_con5";
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# Still only transaction 1 visible, as group2 have not yet run commit_ordered().
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SELECT * FROM t1 ORDER BY a;
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SET DEBUG_SYNC= "now SIGNAL group3_committed";
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SET DEBUG_SYNC= "now WAIT_FOR group2_visible";
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# Now transactions 1-4 visible.
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SELECT * FROM t1 ORDER BY a;
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SET DEBUG_SYNC= "now SIGNAL group2_checked";
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connection con2;
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reap;
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connection con3;
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reap;
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connection con4;
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reap;
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connection con5;
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reap;
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connection con6;
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reap;
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connection default;
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# Check all transactions finally visible.
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SELECT * FROM t1 ORDER BY a;
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SELECT variable_value - @commits FROM information_schema.global_status
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WHERE variable_name = 'binlog_commits';
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SELECT variable_value - @group_commits FROM information_schema.global_status
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WHERE variable_name = 'binlog_group_commits';
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SET DEBUG_SYNC= 'RESET';
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DROP TABLE t1;
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