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Detailed revision comments: r6884 | vdimov | 2010-03-26 13:05:03 +0200 (Fri, 26 Mar 2010) | 6 lines branches/5.1: Fix a non-determinism in innodb_bug38231. Reported by: Sergey Vojtovich <svoj@Sun.COM> r6884 | vdimov | 2010-03-26 13:05:03 +0200 (Fri, 26 Mar 2010) | 6 lines branches/5.1: Fix a non-determinism in innodb_bug38231. Reported by: Sergey Vojtovich <svoj@Sun.COM>
112 lines
2.6 KiB
Text
112 lines
2.6 KiB
Text
#
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# Bug#38231 Innodb crash in lock_reset_all_on_table() on TRUNCATE + LOCK / UNLOCK
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# http://bugs.mysql.com/38231
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#
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-- source include/have_innodb.inc
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SET storage_engine=InnoDB;
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# we care only that the following SQL commands do not crash the server
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-- disable_query_log
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-- disable_result_log
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DROP TABLE IF EXISTS bug38231;
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CREATE TABLE bug38231 (a INT);
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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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-- connection con1
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SET autocommit=0;
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LOCK TABLE bug38231 WRITE;
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-- connection con2
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SET autocommit=0;
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-- send
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LOCK TABLE bug38231 WRITE;
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# When con1 does UNLOCK below this will release either con2 or con3 which are
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# both waiting on LOCK. At the end we must first --reap and UNLOCK the
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# connection that has been released, otherwise it will wait forever. We assume
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# that the released connection will be the first one that has gained the LOCK,
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# thus we force the order here - con2 does LOCK first, then con3. In other
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# words we wait for LOCK from con2 above to be exected before doing LOCK in
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# con3.
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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 = 'LOCK TABLE bug38231 WRITE';
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-- source include/wait_condition.inc
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# the above enables query log, re-disable it
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-- disable_query_log
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-- connection con3
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SET autocommit=0;
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-- send
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LOCK TABLE bug38231 WRITE;
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-- connection default
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-- send
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TRUNCATE TABLE bug38231;
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-- connection con1
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# Wait for TRUNCATE and the other two LOCKs to be executed; without this,
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# sometimes UNLOCK executes before them. We assume there are no other
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# sessions executing at the same time with the same SQL commands.
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let $wait_condition =
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SELECT COUNT(*) = 1 FROM information_schema.processlist
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WHERE info = 'TRUNCATE TABLE bug38231';
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-- source include/wait_condition.inc
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let $wait_condition =
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SELECT COUNT(*) = 2 FROM information_schema.processlist
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WHERE info = 'LOCK TABLE bug38231 WRITE';
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-- source include/wait_condition.inc
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# the above enables query log, re-disable it
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-- disable_query_log
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# this crashes the server if the bug is present
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UNLOCK TABLES;
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# clean up
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-- connection con2
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-- reap
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UNLOCK TABLES;
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-- connection con3
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-- reap
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UNLOCK TABLES;
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-- connection default
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-- reap
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-- disconnect con1
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-- disconnect con2
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-- disconnect con3
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# test that TRUNCATE works with with row-level locks
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-- enable_query_log
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-- enable_result_log
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INSERT INTO bug38231 VALUES (1), (10), (300);
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-- connect (con4,localhost,root,,)
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-- connection con4
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SET autocommit=0;
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SELECT * FROM bug38231 FOR UPDATE;
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-- connection default
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TRUNCATE TABLE bug38231;
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-- connection con4
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COMMIT;
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-- connection default
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-- disconnect con4
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DROP TABLE bug38231;
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