I overhauled the Job Scheduler, so many of the problems you listed don't
exist anymore.
-Adrian
On 3/22/2013 6:32 AM, Jacopo Cappellato wrote:
Hi Paul,
and thank you for your feedback on Quartz.
As regards the current job scheduler, there are a few issues that I often have
to cope with in production, when the number of records in the JobSandbox grows
over a certain limit (due to high load or to some failing job that is executed
over and over); you can end up with db lock errors on the JobSandbox and the
implementation of the service that cleans the old job (purgeOldJobs) is not
ideal; that service also makes use of the ServiceSemaphore entity in order to
guarantee that no more than one job at the time is run and I have some concerns
about the reliability of this approach (race conditions, stale data); some
interesting threads are:
http://ofbiz.135035.n4.nabble.com/Replace-JobManager-with-Quartz-Scheduler-td2999416.html
http://ofbiz.135035.n4.nabble.com/Job-Manager-td4635496.html
http://permalink.gmane.org/gmane.comp.java.ofbiz.user/34131
On the other hand, the OFBiz job scheduler is used a lot and so it is "tested"
every day in many production instances and, despite of some problems (some of them
mentioned above), as you said, it just works. For this reason I agree that we should
evaluate this (and similar other proposed in my first email) changes carefully before
taking a decision.
Kind regards,
Jacopo
On Mar 22, 2013, at 12:26 AM, Paul Piper <[email protected]> wrote:
I have worked with Quartz before - it is a fantastic solution, so I'd also
second that opinion of implementing Quartz as a replacement for the job
scheduler. The only point that would speak against it, is that I haven't
really had any issues with the current scheduler, so a replacement may not
be necessary and should be discussed whether it is a worthwhile venture.
--
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