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I'll see what I can do about the test case - might take a few days to get ready, though. I've got heap dumps, in the meantime, and the attached image shows the whole 900MB hanging off an ArrayList...

Thanks for the reply. What confused me was the explosion in the number of JobExecutions. If we've only got one continuously-running Job, I'd expect one JobExecution and 750-ish StepExecutions, not...

We've set up a Spring Batch batch email-sender job that does the following:


Read incoming email details from a JMS Queue.
Don't do any processing, just pass them through...
Turn the details...