First it subtracts 10 from the balance of account 2. The 2nd transaction will do the reverse work: transfer 10 dollars from account 2 to account 1. The 1st transaction will transfer 10 dollars from account 1 to account 2, by first subtracting 10 from the the balance of account 1, and then adding 10 to the balance of account 2. Context, arg TransferTxParams ) ( TransferTxResult, error ) Įnter fullscreen mode Exit fullscreen mode 3 How to write & run database migration in Golang 4 Generate CRUD Golang code from SQL | Compare db/sql, gorm, sqlx, sqlc 5 Write Go unit tests for db CRUD with random data 6 A clean way to implement database transaction in Golang 7 DB transaction lock & How to handle deadlock 8 How to avoid deadlock in DB transaction? Queries order matter! 9 Deeply understand Isolation levels and Read phenomena in MySQL & PostgreSQL 10 How to setup Github Actions for Go + Postgres to run automated tests 11 Implement RESTful HTTP API in Go using Gin 12 Load config from file & environment variables in Golang with Viper 13 Mock DB for testing HTTP API in Go and achieve 100% coverage 14 Implement transfer money API with a custom params validator in Go 15 Add users table with unique & foreign key constraints in PostgreSQL 16 How to handle DB errors in Golang correctly 17 How to securely store passwords? 18 How to write stronger unit tests with a custom go-mock matcher 19 Why PASETO is better than JWT for token-based authentication? 20 How to create and verify JWT & PASETO token in Golang 21 Implement login user API that returns PASETO or JWT access token in Goįunc ( store * Store ) TransferTx ( ctx context. Then again, I guess not many people are stuck with SQL Server.1 Design DB schema and generate SQL code with dbdiagram.io 2 Install & use Docker + Postgres + TablePlus to create DB schema. I think that mentioning these settings in the Spring Batch documentation regarding launching multiple jobs at a given time when using SQL Server as your dataSource would be quite helpful to others. It may be a moot point but I can't risk having jobs fail to launch. I've also kept retry code (see comment on question) in place when launching the jobs just to catch any possible deadlocks and allow it to retry. I've tested this with 30 jobs (same job with different parameters) being launched by a group of Quartz jobs and thus far I haven't seen any issues. Here are the settings I am using with SQL Server 2008: The simple way to address this is to configure the databaseType and isolationLevelForCreate properties of the JobRepository. Rerun the transaction.Īt .(SqlServerMaxValueIncrementer.java:124)Īt .(AbstractDataFieldMaxValueIncrementer.java:1Īt .(JdbcJobInstanceDao.java:108)Īt .(SimpleJobRepository.java:135)Īt 0(Native Method)Īt (Unknown Source)Īfter researching this further, and partially heading down the path of working on versions of the DAOs that back the JobRepository and work with SQL Server IDENTITY instead of sequences, I stumbled upon the way to address this without much more than a bit of configuration. Transaction (Process ID 74) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. From the database perspective we can see that the deadlock victims were doing one of the following: Insert into BATCH_JOB_SEQ default values or Delete from BATCH_JOB_SEQ where ID A more detailed stack trace can be found below. When the multiple jobs are started simultaneously we get SQL deadlock exceptions. The only database involved is the Spring Batch metadata database. All of the jobs are started simultaneously, only read/write flat files and update the same Spring Batch metadata hosted in SQL Server. We have multiple Spring Batch jobs each running in their own java instance using the CommandLineJobRunner.
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