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# Let's see if FLUSH TABLES WITH READ LOCK blocks COMMIT of existing # transactions. # We verify that we did not introduce a deadlock. # This is intended to mimick how mysqldump and innobackup work. # And it requires InnoDB --source include/have_innodb.inc --echo # Save the initial number of concurrent sessions --source include/count_sessions.inc --echo # Establish connection con1 (user=root) connect (con1,localhost,root,,); --echo # Establish connection con2 (user=root) connect (con2,localhost,root,,); --echo # Establish connection con3 (user=root) connect (con3,localhost,root,,); --echo # Switch to connection con1 connection con1; --disable_warnings DROP TABLE IF EXISTS t1; --enable_warnings CREATE TABLE t1 (a INT) ENGINE=innodb; # blocks COMMIT ? BEGIN; INSERT INTO t1 VALUES(1); --echo # Switch to connection con2 connection con2; FLUSH TABLES WITH READ LOCK; --echo # Switch to connection con1 connection con1; --echo # Sending: --send COMMIT --echo # Switch to connection con2 connection con2; --echo # Wait until COMMIT gets blocked. let $wait_condition= select count(*) = 1 from information_schema.processlist where state = "Waiting for commit lock" and info = "COMMIT"; --source include/wait_condition.inc --echo # Verify that 'con1' was blocked and data did not move. SELECT * FROM t1; UNLOCK TABLES; --echo # Switch to connection con1 connection con1; --echo # Reaping COMMIT --reap # No deadlock ? --echo # Switch to connection con1 connection con1; BEGIN; SELECT * FROM t1 FOR UPDATE; --echo # Switch to connection con2 connection con2; BEGIN; send SELECT * FROM t1 FOR UPDATE; # blocked by con1 sleep 1; --echo # Switch to connection con3 connection con3; send FLUSH TABLES WITH READ LOCK; # blocked by con2 --echo # Switch to connection con1 connection con1; COMMIT; # should not be blocked by con3 --echo # Switch to connection con2 connection con2; reap; COMMIT; --echo # Switch to connection con3 connection con3; reap; UNLOCK TABLES; # Bug#6732 FLUSH TABLES WITH READ LOCK + COMMIT hangs later FLUSH TABLES # WITH READ LOCK --echo # Switch to connection con2 connection con2; COMMIT; # unlock InnoDB row locks to allow insertions --echo # Switch to connection con1 connection con1; BEGIN; INSERT INTO t1 VALUES(10); FLUSH TABLES WITH READ LOCK; --echo # Switch to connection con2 connection con2; FLUSH TABLES WITH READ LOCK; # bug caused hang here UNLOCK TABLES; # Bug#7358 SHOW CREATE DATABASE fails if open transaction BEGIN; SELECT * FROM t1; SHOW CREATE DATABASE test; COMMIT; --echo # Cleanup --echo # Switch to connection default and close connections con1, con2, con3 connection default; disconnect con1; disconnect con2; disconnect con3; --echo # We commit open transactions when we disconnect: only then we can --echo # drop the table. DROP TABLE t1; --echo # End of 4.1 tests --echo # Wait till all disconnects are completed --source include/wait_until_count_sessions.inc