bject:
Re: Serialization failure: 1213 Deadlock found when trying to get lock;
try restarting transaction
Try to run
SHOW ENGINE INNODB STATUS;
Near the top there will be some information on the latest deadlock.
That might help you to understand what is deadlocking. Sometimes
changing the
li_lock l ON l.object_id = q.queue_id AND l.lock_type =
'parse'
WHERE l.object_id IS NULL
AND q.status = 'parse'
ORDER BY q.file_size ASC, q.created ASC, q.queue_id ASC
LIMIT 1
However, as I execute this query several times each minute from
different
applications, I fr
LECT $LOCK_ID, q.queue_id, 'parse', DATE_ADD(NOW(), INTERVAL 1 HOUR)
>>> FROM queue q
>>> LEFT JOIN cli_lock l ON l.object_id = q.queue_id AND l.lock_type =
>>> 'parse'
>>> WHERE l.object_id IS NULL
>>> AND q.status = 'parse&#x
d IS NULL
AND q.status = 'parse'
ORDER BY q.file_size ASC, q.created ASC, q.queue_id ASC
LIMIT 1
However, as I execute this query several times each minute from different
applications, I frequently get these messages:
DB ERROR: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found
fferent
> applications, I frequently get these messages:
>
> DB ERROR: SQLSTATE[40001]: Serialization failure: 1213 Deadlock
found when
> trying to get lock; try restarting transaction
>
> Am I writing my query wrong or expecting behavior th
ile_size ASC, q.created ASC, q.queue_id ASC
> > LIMIT 1
> >
> > However, as I execute this query several times each minute from different
> > applications, I frequently get these messages:
> >
> > DB ERROR: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found
.file_size ASC, q.created ASC, q.queue_id ASC
> LIMIT 1
>
> However, as I execute this query several times each minute from different
> applications, I frequently get these messages:
>
> DB ERROR: SQLSTATE[40001]: Serialization failure: 1213 Deadlock found when
> trying t
27;parse'
WHERE l.object_id IS NULL
AND q.status = 'parse'
ORDER BY q.file_size ASC, q.created ASC, q.queue_id ASC
LIMIT 1
However, as I execute this query several times each minute from different
applications, I frequently get these messages:
DB ERROR: SQLSTATE[40001]: Serializati
, and I don't
> really understand how it can happen.
> I've strip down an example, that does basically :
>
> BEGIN;
> SELECT id FROM ttt WHERE id=3D7 FOR UPDATE;
> INSERT INTO ttt(id) VALUES (7);
> DELETE FROM ttt WHERE id=3D7;
> COMMIT;
>
> I run 10
NTO ttt(id) VALUES (7);
DELETE FROM ttt WHERE id=7;
COMMIT;
I run 10 instances of the program in parallel and I get the error :
Deadlock found when trying to get lock; try restarting transaction.
The isolation level is the default one.
My understanding of the SELECT ... FOR UPDATE is that I should no
lmost every 2
seconds. After 4 days I suddenly got the following error, one which I used
to get much more frequently with 4.0.0.
DBD::mysql::st execute failed: Deadlock found when trying to get lock; Try
restarting transaction at
/usr/local/lib/perl5/site_perl/5.6.1/i386-freebsd/Mysql.pm line 172.
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