#MYSQL DEADLOCK SELECT HOW TO#

I caught this deadlock in my application I am using Hibernate for get data from DB and in my log, I see next: Caused by:.

#MYSQL DEADLOCK SELECT HOW TO#

Tb_periodicidadeServico TAB IS GRANT XactĪnybody have any pointers on how to get to the root of the problem? I have a suspicion that the table tb_intervaloServico is the root of the blocking because it's being called in the delete and in the select, but I can't reproduce the behavior. When I try to make UPDATE with subselect I catch deadlocks. This are the locks generated by the delete. FOR UPDATE and ends-up deadlocking each other. To identify deadlocks on a database, please enable the innodbprintalldeadlock and innodbdeadlockdetect parameter in the parameter group to log all. Our application performs multiple identical requests using SELECT. subselect would do the right thing regarding duplicate paths. For Percona Server for MySQL 5.7, I have developed the following script (that you can find in our support snippets repo) that prints SQL history for two transactions involved in a deadlock, that can help in troubleshooting some complex deadlock cases. FOR UPDATE creates unexpected deadlock - Stack Overflow. Because both transactions are waiting for a resource to become available, neither ever release the locks it holds.

Where ints.idPeriodicidadeServico=ps.idPeriodicidadeServicoĪnd idservicoContrato='7f20b4af-9076-48f9-a861-8b78273eadc3'įor some reason, the delete gets a blocking status and doesn't finish(?) The only other process that I find blocked by this, is a maintenance plan that runs on the weekend to recreate the indices, so I have no ideia what could be generating the problem. review to understand the behavior of some SQL under MySQL. MySQL Deadlocks in InnoDB Jmark 2 Comments A deadlock is a situation where different transactions are unable to proceed because each holds a lock that the other needs. The following SQL statement is occasionally generating deadlocks in my mssqlserver 2000 server delete from tb_intervaloServicoįrom tb_periodicidadeServico ps, tb_intervaloServico ints

Mysql deadlock select