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Bug #22876 Four-way deadlock This bug was fixed as a part of Bug#989 "If DROP TABLE while there's an active transaction, wrong binlog order" A statement which would have caused circular wait will now be aborted with ER_LOCK_DEADLOCK. Test case based on bug description added to innodb_mysql_lock.test. Note that innodb_lock_wait_timeout is set to 5 mins to prevent race conditions in the test.
59 lines
1.3 KiB
Plaintext
59 lines
1.3 KiB
Plaintext
-- source include/have_innodb.inc
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--echo #
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--echo # Bug #22876 Four-way deadlock
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--echo #
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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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connect (con1,localhost,root,,);
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connect (con2,localhost,root,,);
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connect (con3,localhost,root,,);
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--echo # Connection 1
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connection con1;
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set @@autocommit=0;
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CREATE TABLE t1(s1 INT UNIQUE) ENGINE=innodb;
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INSERT INTO t1 VALUES (1);
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--echo # Connection 2
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connection con2;
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set @@autocommit=0;
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INSERT INTO t1 VALUES (2);
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--send INSERT INTO t1 VALUES (1)
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--echo # Connection 3
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connection con3;
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set @@autocommit=0;
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--send DROP TABLE t1
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--echo # Connection 1
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connection con1;
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE info = "INSERT INTO t1 VALUES (1)" and
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state = "update";
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--source include/wait_condition.inc
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let $wait_condition=
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE info = "DROP TABLE t1" and
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state = "Waiting for table";
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--source include/wait_condition.inc
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--echo # Connection 1 is now holding the lock.
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--echo # Issuing insert from connection 1 while connection 2&3
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--echo # is waiting for the lock should give a deadlock error.
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--error ER_LOCK_DEADLOCK
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INSERT INTO t1 VALUES (2);
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--echo # Cleanup
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connection con2;
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--reap
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commit;
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connection con1;
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commit;
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connection con3;
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--reap
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connection default;
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