41 lines
1.3 KiB
Plaintext
41 lines
1.3 KiB
Plaintext
DROP TABLE IF EXISTS t1;
|
|
SET DEBUG_SYNC= 'RESET';
|
|
CREATE TABLE t1 (kill_id INT) engine = InnoDB;
|
|
INSERT INTO t1 VALUES(connection_id());
|
|
# Switching to connection 'default'.
|
|
# Start transaction.
|
|
BEGIN;
|
|
INSERT INTO t1 VALUES(connection_id());
|
|
# Ensure that COMMIT will pause once it acquires protection
|
|
# against its global read lock.
|
|
SET DEBUG_SYNC='ha_commit_trans_after_acquire_commit_lock SIGNAL acquired WAIT_FOR go';
|
|
# Sending:
|
|
COMMIT;
|
|
# Switching to 'con1'.
|
|
# Wait till COMMIT acquires protection against global read
|
|
# lock and pauses.
|
|
SET DEBUG_SYNC='now WAIT_FOR acquired';
|
|
# Sending:
|
|
FLUSH TABLES WITH READ LOCK;
|
|
# Switching to 'con2'.
|
|
SELECT ((@id := kill_id) - kill_id) FROM t1 LIMIT 1;
|
|
((@id := kill_id) - kill_id)
|
|
0
|
|
Warnings:
|
|
Warning 1287 Setting user variables within expressions is deprecated and will be removed in a future release. Consider alternatives: 'SET variable=expression, ...', or 'SELECT expression(s) INTO variables(s)'.
|
|
# Wait till FLUSH TABLES WITH READ LOCK blocks due
|
|
# to active COMMIT
|
|
# Kill connection 'con1'.
|
|
KILL CONNECTION @id;
|
|
# Switching to 'con1'.
|
|
# Try to reap FLUSH TABLES WITH READ LOCK,
|
|
# it fail due to killed statement and connection.
|
|
Got one of the listed errors
|
|
# Switching to 'con2'.
|
|
# Resume COMMIT.
|
|
SET DEBUG_SYNC='now SIGNAL go';
|
|
# Switching to 'default'.
|
|
# Reaping COMMIT.
|
|
DROP TABLE t1;
|
|
SET DEBUG_SYNC= 'RESET';
|