When using batches with Hangfire 1.5.0-beta3 and Pro 1.4-beta1 (with SQL Express 2014), queued jobs will get executed, but with an error logged after a couple of seconds:
Hangfire.Storage.DistributedLockTimeoutException: Timeout expired. The timeout elapsed prior to obtaining a distributed lock on the 'HangFire:batch:12c77919-af37-4779-8729-b0ddb65dd4c9:lock' resource.
They are thus repeated over and over again, so the job runs forever and the batch job never finishes. The method called for the batch items only contains a simple line log.Debug (log4net) to see if the atomic operations in the batch are executed. They are, but there seems to be a problem with the distributed lock that I don't understand well enough, it seems.
I couldn't find anything helpful (at least not for me) or related in the source or on the forum.
Maybe it's of relevance that the BackgroundJob that is executed to start the BatchJob is executed from within another BackgroundJob? The "outer most" BackgroundJob has the DisableConcurrentExecution attribute set; the others not. Also they are in different queues (via attributes).
Any ideas? Thanks!