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d7946a908f
a.k.a. Bug#7975 deadlock without any locking, simple select and update Bug#7975 was reintroduced when the storage engine API was made pluggable in MySQL 5.1. Instead of looking at thd->lex directly, we rely on handler::extra(). But, we were looking at the wrong extra() flag, and we were ignoring the TRX_DUP_REPLACE flag in places where we should obey it. innodb_replace.test: Add tests for hopefully all affected statement types, so that bug should never ever resurface. This kind of tests should have been added when fixing Bug#7975 in MySQL 5.0.3 in the first place. rb:806 approved by Sunny Bains
187 lines
5.1 KiB
Plaintext
187 lines
5.1 KiB
Plaintext
--source include/have_innodb.inc
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--source include/have_debug_sync.inc
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--echo #
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--echo #Bug#11759688 52020: InnoDB can still deadlock
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--echo #on just INSERT...ON DUPLICATE KEY
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--echo #a.k.a. Bug#7975 deadlock without any locking, simple select and update
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--echo #
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CREATE TABLE t1 (a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB;
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INSERT INTO t1 VALUES(3,1);
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connect (con1,localhost,root,,);
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connect (con2,localhost,root,,);
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connection con1;
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BEGIN;
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# normal INSERT of a duplicate should only S-lock the existing record (3,1)
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SET DEBUG_SYNC='write_row_noreplace SIGNAL insert1 WAIT_FOR select1';
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--send
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INSERT INTO t1 VALUES(3,2);
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR insert1';
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# this should S-lock (3,1); no conflict
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SELECT * FROM t1 LOCK IN SHARE MODE;
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# this should X-lock (3,1), conflicting with con1
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--send
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SELECT * FROM t1 FOR UPDATE;
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connection con2;
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# Check that the above SELECT is blocked
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'Sending data' and
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info = 'SELECT * FROM t1 FOR UPDATE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select1';
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connection con1;
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--error ER_DUP_ENTRY
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reap;
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# We are still holding an S-lock on (3,1) after the failed INSERT.
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# The following will upgrade it to an X-lock, causing a deadlock.
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# InnoDB should resolve the deadlock by aborting the blocked SELECT.
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INSERT INTO t1 VALUES(3,3) ON DUPLICATE KEY UPDATE b=b+10;
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connection default;
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--error ER_LOCK_DEADLOCK
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reap;
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connection con1;
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COMMIT;
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SET DEBUG_SYNC='write_row_replace SIGNAL insert2 WAIT_FOR select2';
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--send
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REPLACE INTO t1 VALUES(3,4);
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR insert2';
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SELECT * FROM t1;
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--send
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SELECT * FROM t1 LOCK IN SHARE MODE;
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connection con2;
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# Check that the above SELECT is blocked because of X lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'Sending data' and
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info = 'SELECT * FROM t1 LOCK IN SHARE MODE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select2';
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connection con1;
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reap;
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SET DEBUG_SYNC='write_row_replace SIGNAL insert3 WAIT_FOR select3';
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--send
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INSERT INTO t1 VALUES(3,5) ON DUPLICATE KEY UPDATE b=b+20;
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connection default;
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reap;
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SET DEBUG_SYNC='now WAIT_FOR insert3';
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--send
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SELECT b FROM t1 LOCK IN SHARE MODE;
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connection con2;
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# Check that the above SELECT is blocked because of X lock.
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'Sending data' and
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info = 'SELECT b FROM t1 LOCK IN SHARE MODE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select3';
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connection default;
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reap;
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connection con1;
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reap;
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SET DEBUG_SYNC='write_row_noreplace SIGNAL insert4 WAIT_FOR select4';
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--send
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LOAD DATA INFILE '../../std_data/loaddata5.dat' INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR insert4';
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# this should S-lock (3,1); no conflict
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SELECT b FROM t1 WHERE a=3 LOCK IN SHARE MODE;
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# this should X-lock (3,1), conflicting with con1
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--send
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SELECT b FROM t1 WHERE a=3 FOR UPDATE;
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connection con2;
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# Check that the above SELECT is blocked
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'statistics' and
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info = 'SELECT b FROM t1 WHERE a=3 FOR UPDATE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select4';
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connection default;
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reap;
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connection con1;
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--error ER_DUP_ENTRY
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reap;
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SET DEBUG_SYNC='write_row_noreplace SIGNAL insert5 WAIT_FOR select5';
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--send
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LOAD DATA INFILE '../../std_data/loaddata5.dat' IGNORE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR insert5';
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SELECT * FROM t1;
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# this should S-lock; no conflict
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SELECT * FROM t1 WHERE a=3 LOCK IN SHARE MODE;
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# this should X-lock, conflicting with the S-lock of the IGNORE in con1
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--send
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SELECT * FROM t1 WHERE a=3 FOR UPDATE;
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connection con2;
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# Check that the above SELECT is blocked
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'statistics' and
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info = 'SELECT * FROM t1 WHERE a=3 FOR UPDATE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select5';
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connection con1;
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reap;
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connection default;
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reap;
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connection con1;
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SET DEBUG_SYNC='write_row_replace SIGNAL insert6 WAIT_FOR select6';
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--send
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LOAD DATA INFILE '../../std_data/loaddata5.dat' REPLACE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
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connection default;
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SET DEBUG_SYNC='now WAIT_FOR insert6';
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SELECT * FROM t1;
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# this should conflict with the X-lock acquired by the REPLACE
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--send
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SELECT a,b FROM t1 LOCK IN SHARE MODE;
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connection con2;
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# Check that the above SELECT is blocked
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let $wait_condition=
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select count(*) = 1 from information_schema.processlist
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where state = 'Sending data' and
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info = 'SELECT a,b FROM t1 LOCK IN SHARE MODE';
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--source include/wait_condition.inc
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SET DEBUG_SYNC='now SIGNAL select6';
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connection con1;
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reap;
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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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connection default;
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SET DEBUG_SYNC='RESET';
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DROP TABLE t1;
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