title: Unable to restart a Spring batch job
body: <p>I have a spring batch job which reads, transforms and writes to an Oracle database. I am running the job via the CommandLineJobRunner utility (using a fat jar + dependencies generated with the maven shade plugin); the job subsequently fails halfway through due to "java heap memory limit reached" and the job is not marked as FAILED but rather still shows status STARTED.</p>
  
  <p>I tried to re-run the job using the same job parameters (as the docs suggest) but this gives me this error:</p>
  
  <pre><code>5:24:34.147 [main] ERROR o.s.b.c.l.s.CommandLineJobRunner - Job Terminated in error: A job execution for this job is already running: JobInstance: id=1, version=0, Job=[maskTableJob]
  </code></pre>
  
  <p>org.springframework.batch.core.repository.JobExecutionAlreadyRunningException: A job execution for this job is already running: JobInstance: id=1, version=0, Job=[maskTableJob]
      at org.springframework.batch.core.repository.support.SimpleJobRepository.createJobExecution(SimpleJobRepository.java:120) ~[maskng-batch-1.0-SNAPSHOT-executable.jar:1.0-SNAPSH</p>
  
  <p>I have tried all sorts of things (like manually setting the status to FAILED, using the -restart argument) but to no avail. Is there something I am missing here as I thought one of the strong points of spring batch is its ability to restart jobs where they left off....!!?</p>