![]() Killing the transaction is not a good idea, you should try to fix the issue. In our environment, most of the time, transaction locks occurs due to one query updating a row and another query trying to read from that row. Transaction locks occurs when two threads trying to access a same row (innoDB) or table (MyISAM). The work around is you can view the status of the innodb by using the following command: show engine innodb status \G Note: Sometimes the locking query state displayed as sleep state. ![]() You can view that locking transaction by running the following command: SHOW FULL PROCESSLIST \G Kill the transaction which causing this locking. Set it during run time dynamically: SET GLOBAL innodb_lock_wait_timeout = 120 Increase the value of innodb_lock_wait_timeout, you can do this by using one of the following two methods, I faced the similar issue, some days ago, I tried the following methods to solve that issue. Purge done for trx's n:o = 1031309, sees < 1031309Īny idea what could be causing this? Let me know if you need more info. This is the output of the transactions section of show engine innodb status. Lock wait timeout exceeded try restarting transactionĪt the beginning I thought it was caused by some slow queries creating deadlocks, but I haven't been able to find any evidence of that. 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.I started having the following error on two different applications that write to the same database and table:.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. 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. ![]() 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.
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