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140cc614c9
+ Fix for Bug#43114 wait_until_count_sessions too restrictive, random PB failures + Removal of a lot of other weaknesses found + modifications according to review
110 lines
2.5 KiB
Plaintext
110 lines
2.5 KiB
Plaintext
# Let's see if FLUSH TABLES WITH READ LOCK blocks COMMIT of existing
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# transactions.
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# We verify that we did not introduce a deadlock.
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# This is intended to mimick how mysqldump and innobackup work.
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# And it requires InnoDB
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--source include/have_innodb.inc
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# Save the initial number of concurrent sessions
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--source include/count_sessions.inc
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--echo # Establish connection con1 (user=root)
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connect (con1,localhost,root,,);
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--echo # Establish connection con2 (user=root)
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connect (con2,localhost,root,,);
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--echo # Establish connection con3 (user=root)
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connect (con3,localhost,root,,);
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--echo # Switch to connection con1
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connection con1;
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--disable_warnings
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DROP TABLE IF EXISTS t1;
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--enable_warnings
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CREATE TABLE t1 (a INT) ENGINE=innodb;
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# blocks COMMIT ?
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BEGIN;
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INSERT INTO t1 VALUES(1);
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--echo # Switch to connection con2
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connection con2;
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FLUSH TABLES WITH READ LOCK;
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SELECT * FROM t1;
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--echo # Switch to connection con1
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connection con1;
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send COMMIT; # blocked by con2
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sleep 1;
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--echo # Switch to connection con2
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connection con2;
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SELECT * FROM t1; # verify con1 was blocked and data did not move
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UNLOCK TABLES;
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--echo # Switch to connection con1
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connection con1;
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reap;
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# No deadlock ?
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--echo # Switch to connection con1
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connection con1;
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BEGIN;
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SELECT * FROM t1 FOR UPDATE;
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--echo # Switch to connection con2
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connection con2;
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BEGIN;
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send SELECT * FROM t1 FOR UPDATE; # blocked by con1
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sleep 1;
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--echo # Switch to connection con3
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connection con3;
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send FLUSH TABLES WITH READ LOCK; # blocked by con2
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--echo # Switch to connection con1
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connection con1;
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COMMIT; # should not be blocked by con3
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--echo # Switch to connection con2
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connection con2;
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reap;
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--echo # Switch to connection con3
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connection con3;
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reap;
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UNLOCK TABLES;
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# Bug#6732 FLUSH TABLES WITH READ LOCK + COMMIT hangs later FLUSH TABLES
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# WITH READ LOCK
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--echo # Switch to connection con2
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connection con2;
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COMMIT; # unlock InnoDB row locks to allow insertions
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--echo # Switch to connection con1
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connection con1;
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BEGIN;
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INSERT INTO t1 VALUES(10);
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FLUSH TABLES WITH READ LOCK;
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COMMIT;
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UNLOCK TABLES;
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--echo # Switch to connection con2
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connection con2;
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FLUSH TABLES WITH READ LOCK; # bug caused hang here
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UNLOCK TABLES;
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# Bug#7358 SHOW CREATE DATABASE fails if open transaction
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BEGIN;
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SELECT * FROM t1;
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SHOW CREATE DATABASE test;
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DROP TABLE t1;
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# Cleanup
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--echo # Switch to connection default and close connections con1, con2, con3
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connection default;
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disconnect con1;
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disconnect con2;
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disconnect con3;
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# End of 4.1 tests
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# Wait till all disconnects are completed
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--source include/wait_until_count_sessions.inc
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