手动更改Spring Batch元数据表是不是一个坏主意？ [英] Is it a bad idea to change the Spring Batch Meta-Data tables manually?

问题描述

我正在使用Spring Batch 2.1.8，并按 CommandLineJobRunner 运行作业。例如：

I'm using Spring Batch 2.1.8, and run jobs by CommandLineJobRunner. Such as:

java org.springframework.batch.core.launch.support.CommandLineJobRunner classpath:launchContext.xml theJobId

问题

在某些情况下，例如服务器崩溃，运行工作可能会中断。
但是被中断的作业在Spring Batch Meta-Data表中留下了 STARTED 状态，并且无法再次运行。

Problem

At some condition such as a server crash, running job could be interrupted. But the interrupted job left a STARTED status in the Spring Batch Meta-Data tables, and can't be run again.

org.springframework.batch.core.repository.JobExecutionAlreadyRunningException: A job execution for this job is already running

我能想到两个解决方案：

I can think of two solutions:

添加一个新的作业参数并每次更改它以使其成为Spring Batch的新作业。例如：

Add a new job parameter and change it everytime to make it a "new" job for Spring Batch. Such as:

java org.springframework.batch.core.launch.support.CommandLineJobRunner classpath:launchContext.xml theJobId times=0

当需要重新运行时，请清除所有相应的输出数据，计算次一次，然后重新运行该作业。

And when need to rerun it, do clear all corresponding output data, count up times once, and then rerun the job.

更改手动弹簧批量元数据表。

Change the Spring Batch Meta-Data tables manually.

更新状态以使作业可重新启动。例如：

To update the status to make the job restartable. Such as:

UPDATE BATCH_JOB_EXECUTION SET END_TIME = SYSTIMESTAMP, STATUS = 'FAILED', EXIT_CODE = 'FAILOVER' WHERE JOB_EXECUTION_ID =
    (SELECT MAX(JOB_EXECUTION_ID) FROM BATCH_JOB_EXECUTION WHERE JOB_INSTANCE_ID =
        (SELECT MAX(JOB_INSTANCE_ID) FROM BATCH_JOB_INSTANCE WHERE JOB_NAME = 'XXX'));

我已经尝试过，看起来效果很好。

I've tried it and it seems works well.

Solution2是个坏主意吗？有没有陷阱？

Is Solution2 a bad idea? Are there any traps?

提前致谢。我们非常感谢任何其他解决方案。

Thanks in advance. And any other solutions are appreciated.

推荐答案

解决方案2是目前公认的方法。 API不提供修复此方案的方法。过去有人要求框架自动清理，但99％的情况下，需要做出人为的决定来确定是否真的需要清理。

Solution 2 is the accepted approach right now. The API does not provide a way to fix this scenario. There have been requests in the past for the framework to clean up automatically, but 99% of the time, a human decision is needed to determine if cleanup is truly required.

我对选项2的唯一注意事项是检查BATCH_STEP_EXECUTION表以查看最后执行的步骤的状态。

My only note for option 2 would be to check the BATCH_STEP_EXECUTION table as well to see what state the last executed step was left in.

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