Depending on the errors involved, the solution may present itself, or you may need to include your helpful log information if you need to open a Support Ticket.Consult this article: Deploy variables (MYSQL_USE_SLAVE_CONNECTION). If on Adobe Commerce on cloud infrastructure, check that MySQL slave is enabled.Check your MySQL process list for running processes with the command mysql -e 'show full processlist'.Adobe Commerce on cloud infrastructure logs locations.Adobe Commerce and Magento Open Source log locations.Check your application, deployment, or MySQL logs for deadlock errors:.Often the application, deployment, or MySQL logs will mention a "deadlock" error or the error "Deadlock found when trying to get lock try restarting transaction." Causeĭeadlocks can have multiple causes, but the most common is if you perform any interaction (website/processes/cron jobs/other users/MySQL maintenance/MySQL imports) while performing DML/DDL queries at the same time.Īs an example, it is a best practice to avoid a stuck MySQL database import by first putting your site in maintenance mode to avoid getting SQL requests to the database that could cause deadlocks and a stuck database import. Deadlocks being present do not always indicate an issue but often are a symptom of some other MySQL or Adobe Commerce issue that has occurred. MySQLTransactionRollbackException: Deadlock found when trying to get lock try restarting transaction at .JobStoreSupport. ERROR 1213 (40001): Deadlock found when trying to get lock try restarting transaction To determine whether or not the server supports innodb, the following commands can be used: 1 2 3 4 5 6 7 mysql> SELECT FROM INFORMATIONSCHEMA.ENGINES, mysql> SHOW ENGINES (Figure 2) both commands above populate the same information. Adobe Commerce on cloud infrastructure 2.2.x and 2.3.xĭeadlocks in MySQL occur when two or more transactions mutually hold and request for locks.Adobe Commerce on-premises 2.2.x and 2.3.x.If I don't get the permanent solution very soon, I am afraid I have to revert back to direct artisan commands.This article talks about deadlocks in MySQL to help identify and resolve them if they cause a site down, stuck database import, or other Adobe Commerce issues. PS: I am trying to find solution since last 2 months. I am afraid of increasing number of queue workers because it will increase the number of deadlocks exponentially. Locating deadlocked transactions At a minimum, to locate the transactions (and more specifically, the deadlocked SQL statements), you will need the PROCESS privilege for your MySQL user. PS: I need more queue workers because the number of queued jobs are more than 40,000 right now. Mysql is known to quickly throw deadlocks under load (note that these are not necessarily deadlocks in the true sense of the words - it means that mysql picks a random transaction to roll back). A deadlock is a situation where different transactions are unable to proceed because each holds a lock that the other needs. Fortunately, MySQL (using the InnoDB engine) offers an extremely simple way to diagnose deadlocks, assuming you know where to look. I am sorry if I sound noob, but I really need help here! Any solutions? I don't want to switch to redis as I am not sending same messages to multiple people or something like that. I also thought about using redis but I think it won't make much difference except I will stop getting this error.īefore using queues for single job, I used to divide my collection into X parts and used to pass array of IDs to commands responsible for processing data. If you are going to comment there is no direct solution to this error, you have to understand why you are facing this issue, I know that! I am just queuing commands as stated in the Laravel documentation. The issue is, I am getting following error in the laravel log and I know it's because of the multiple processes trying to lock the row at the same time in the Jobs table.ĭeadlock found when trying to get lock try restarting transaction (SQL: delete from 'jobs' where 'id' = 7405457) And one of the inserts fires a trigger as well. I have a PHP function which executes several database insert queries which enclose in a transaction. I have 8 queue workers running on my server. I found a SQL deadlock issue which occurs when the function is executed concurrently by two users. My queues are bit different than normally what it is used for. I just want to get rid of MySQL deadlocks with laravel queues.
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