[rules-users] Bugs in Drools 5.3.0 break Fusion event processing

[Richard Calmbach]

Edson: Thanks for the quick reply. I created these JIRA issues:

F1: Duplicate job scheduling in
org.drools.time.impl.DefaultTimerJobInstance.call()
- https://issues.jboss.org/browse/JBRULES-3284

F2: NullPointerException in
org.drools.time.impl.DefaultTimerJobInstance.compareTo(DefaultTimerJobInstance)
- https://issues.jboss.org/browse/JBRULES-3285

F3: org.drools.time.TimerService.scheduleJob(Job, JobContext, Trigger)
suddenly requires non-null JobContext
- https://issues.jboss.org/browse/JBRULES-3286

While you are working on the event scheduling system, you may also want to
look at these two earlier bug reports for Drools 5.2.0:

Long.MAX_VALUE duration for "A and not(B after A)" type rules causes
invalid session clock time in rule RHS when running with pseudo clock
- https://issues.jboss.org/browse/JBRULES-3100

"A and not(B after A)" type rules don't fire when session clock has
negative values (pre Unix epoch)
- https://issues.jboss.org/browse/JBRULES-3103

I have not checked their status in Drools 5.3.0, but the description should
tell you whether they still apply.

FWIW, among all of these, F2 (JBRULES-3285) has the highest priority (as
it's breaking my unit tests), followed by F1 (JBRULES-3284). Thanks!

Vincent: Yes, I think there is risk. Even if you don't use jobs explicitly,
Drools uses the same event scheduling system for both internal events and
application-defined events and jobs. The main problem is this: How do you
establish correctness of your code and the overall system? Well, you make
sure your unit tests and functional tests pass. As it stands, I cannot get
my tests to pass with Drools 5.3.0, so I cannot put Drools 5.3.0 in
production. No matter which version you use, only good test coverage will
give you the assurance that your system is functioning properly. I
encourage you to try out Drools 5.3.0 (in a test environment) and to report
any issues you run into. It can only help make Drools better.

2011/11/9 Vincent LEGENDRE <vincent.legendre at eurodecision.com>

> Just wondering : does these problems happends because you use clocks and
> jobs, or is it general to fusion 5.3 ?
> Did not migrate my project on 5.3 for now.
> So do you think there is a risk, knowing that I only use very basic fusion
> features ?
>
> ------------------------------
> *De: *"Edson Tirelli" <ed.tirelli at gmail.com>
> *À: *"Rules Users List" <rules-users at lists.jboss.org>
> *Envoyé: *Mercredi 9 Novembre 2011 14:53:00
> *Objet: *Re: [rules-users] Bugs in Drools 5.3.0 break Fusion event
> processing
>
>
>
>    Richard,
>
>    This is great info. Yes, please open JIRA's for all 3 issues and we
> will make sure this is fixed for the next release.
>
>    Thank you,
>    Edson
>
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