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43 lines
1.2 KiB
Plaintext
43 lines
1.2 KiB
Plaintext
connect con1,localhost,root,,;
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connect con2,localhost,root,,;
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connection con1;
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DROP TABLE IF EXISTS t1;
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SET DEBUG_SYNC= 'RESET';
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CREATE TABLE t1 (kill_id INT) engine = InnoDB;
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INSERT INTO t1 VALUES(connection_id());
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connection default;
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# Start transaction.
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BEGIN;
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INSERT INTO t1 VALUES(connection_id());
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# Ensure that COMMIT will pause once it acquires protection
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# against its global read lock.
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SET DEBUG_SYNC='ha_commit_trans_after_acquire_commit_lock SIGNAL acquired WAIT_FOR go';
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# Sending:
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COMMIT;
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connection con1;
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# Wait till COMMIT acquires protection against global read
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# lock and pauses.
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SET DEBUG_SYNC='now WAIT_FOR acquired';
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# Sending:
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FLUSH TABLES WITH READ LOCK;
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connection con2;
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SELECT ((@id := kill_id) - kill_id) FROM t1 LIMIT 1;
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((@id := kill_id) - kill_id)
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0
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# Wait till FLUSH TABLES WITH READ LOCK blocks due
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# to active COMMIT
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# Kill connection 'con1'.
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KILL CONNECTION @id;
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connection con1;
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# Try to reap FLUSH TABLES WITH READ LOCK,
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# it fail due to killed statement and connection.
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Got one of the listed errors
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connection con2;
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# Resume COMMIT.
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SET DEBUG_SYNC='now SIGNAL go';
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connection default;
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# Reaping COMMIT.
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disconnect con2;
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DROP TABLE t1;
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SET DEBUG_SYNC= 'RESET';
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