![]() Locate the offending transactions in the source code. ![]() You can read more information about deadlock at. Example ofa deadlock error mysql> CALL tferfunds(1,2,300) ERROR 1213 (40001): Deadlock found when trying to get lock try restarting transaction Deadlocks. The strategy for dealing with deadlocks includes 3 steps: Identify the offending transactions. The weewx programs are not stopped during these backups. WHERE useridY AND groupidX assuming these ere different keys. Because both transactions are waiting for a resource to become available, neither ever release the locks it holds. WHERE groupidX AND useridY and UPDATE TABLE. A deadlock is a situation where different transactions are unable to proceed because each holds a lock that the other needs. To avoid the deadlock, you should set the same table locking order for both connections, for example: Once a day my weewx MySQL databases are backupped, see log of the backup below. Are you using transactions This can also result if two transactions are working on the same table but different key words. To solve the problem, you should reorganize the application logic, in order to avoid a deadlock.Ī deadlock occurs when two parallel connections attempt to lock 2 tables in a different order, for example:Ĭonnection1 attempts to lock tableB - waits for connection2 to unlock tableB Ĭonnection2 attempts to lock tableA - waits for connection1 to unlock tableA.Īs a result, we get a deadlock. Serialization failure: 1213 Deadlock found when trying to get lock try restarting transaction. ![]() For example, if your code causes uniqueness violation, the application will get stuck. You get a deadlock when two transactions are trying to lock two locks at opposite orders, ie: connection 1: locks key(1), locks key(2) connection 2: locks key(2), locks key(1) If both run at the same time, connection 1 will lock key(1), connection 2 will lock key(2) and each connection will wait for the other to release the key -> deadlock. S dng Transaction trong MySQL Theo mc nh thuc tnh autocommit s c enabled, Tc l mi cu lnh s tng ng nh nm trong khi START TRANSACTION-COMMIT v khng th ROLLBACK (tr khi c exception) V vy chng ta cn disabled n: SET autocommit 0 hoc bt u mt transaction START TRANSACTION. This might solve the issue by itself, but I think it might require change 2 below as well. ![]() I have got these 2 errors in total after running 50 tests for each type (v4/v6na/v6pd) for 10 sec with 4 x 20000 pkts/s.Your code for restarting transaction on error cannot solve the problem, since re-execution of one and the same code will cause the same errors. larsmeldgaard commented on edited Change the index IXJobQueueQueueAndFetchedAt to also include the Id as part of the multi-column index which will make the index unique. 00:50:29.834 ERROR ALLOC_ENGINE_V4_ALLOC_ERROR, cid=, tid=0x8: error during attempt to allocate an IPv4 address: unable to execute for, reason: Deadlock found when trying to get lock try restarting transaction (error code 1213) 01:33:24.001 ERROR ALLOC_ENGINE_V6_ALLOC_ERROR duid=, tid=0x26: error during attempt to allocate an IPv6 address: unable to execute for, reason: Deadlock found when trying to get lock try restarting transaction (error code 1213) ![]()
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