提交失败，但步骤执行数据已更新

Question

当 Spring Batch 尝试提交记录时，我收到“提交失败，而步骤执行数据已更新”错误。任何帮助将不胜感激。我正在使用 HIbernate JPA 。

它适用于较少数量的记录。当记录计数很高时抛出错误。

堆栈跟踪：

2016-01-20 08:49:45 INFO  TaskletStep:359 - Commit failed while step execution data was already updated. Reverting to old version.
2016-01-20 08:49:45 ERROR TaskletStep:370 - Rolling back with transaction in unknown state
2016-01-20 08:49:45 ERROR AbstractStep:225 - Encountered an error executing  step uploadFiles in job fileUploadJob
org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException:  Transaction marked as rollbackOnly
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:524)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)

Answer 1

我遇到了同样的错误“步骤执行数据已更新时提交失败。正在恢复到旧版本”，我通过在提交记录的方法上方使用“@Transactional(propagation = Propagation.REQUIRES_NEW)”注释解决了这个问题。