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On 04/10/2011 20:17, Edson Tirelli wrote:
<blockquote
cite="mid:CAD7AJnf+sbBRvp1XqUfoVaA3qp9KVX4pMOmxp+S02PjWOhLiZw@mail.gmail.com"
type="cite">
<div><br>
</div>
<div> The difference in that area from 5.2 to 5.3 is that in 5.3
the interaction between Terminal Nodes and the agenda was
refactored into a "listerner pattern" . This is required for
future features we are working on. It seems the change
introduced the regression. </div>
<div><br>
</div>
This is probably enough info to recreate the problem and I bet
the different agenda groups are really important in recreating it.
<div><br>
</div>
<div> I am working in a couple tasks at the moment, but if you
can meanwhile open a JIRA with this info I will fix it for the
5.3 final release. If you can, please try to isolate a test case
with this scenario:</div>
<div><br>
</div>
<div>"If 021 fires to turn off the lookup AND 042B fires to turn
on the lookup, then 022 gets and NPE."</div>
<div> </div>
<div> If you are unable to, no problem.</div>
<div><br>
</div>
<div> BTW, I liked Wolfgang's handler as well. If he would like
to contribute the code, more than happy to add it to the
codebase.</div>
</blockquote>
I've already aplied this to master and the 5.3.x branch:<br>
<a class="moz-txt-link-freetext" href="https://issues.jboss.org/browse/JBRULES-3233">https://issues.jboss.org/browse/JBRULES-3233</a><br>
<br>
Mark<br>
<blockquote
cite="mid:CAD7AJnf+sbBRvp1XqUfoVaA3qp9KVX4pMOmxp+S02PjWOhLiZw@mail.gmail.com"
type="cite">
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<div> Edson</div>
<div><br>
<div class="gmail_quote">2011/10/4 Jamie <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:jshaw@llbean.com">jshaw@llbean.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex;">
Thanks for all of the feedback. I haven't tried W's
handler, but I'm<br>
planning to. I did take Edson's advice and was able to get
some more info.<br>
<br>
It appears to involve the interaction between 3 rules. For
background, this<br>
is a fraud detection application. Under certain conditions,
we need to look<br>
up additional customer information. Some rules are run to
determine whether<br>
the lookup is required and then another rule actually does
the lookup. In<br>
this case:<br>
<br>
Rule 021 says if the order is small, set the lookup flag to
false<br>
Rule 042B says if the order is from a 'bad' country, set the
lookup flag to<br>
true<br>
Rule 022 says if the lookup flag is true, do the lookup<br>
<br>
If rule 021 fires alone, then 022 does not fire and all is
well.<br>
If rule 042B fires alone, then 022 fires and all is well.<br>
If 021 fires to turn off the lookup AND 042B fires to turn
on the lookup,<br>
then 022 gets and NPE.<br>
<br>
As Edson suspected, the item is null and the 'rule' variable
points to rule<br>
021.<br>
<br>
I'm not sure if it matters, but each rules involved is in a
different agenda<br>
group.<br>
<br>
As I mentioned, this works in 5.2.0.Final, but breaks in
5.3.0.CR1.<br>
<br>
Hope this helps pinpoint the issue.<br>
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-- <br>
Edson Tirelli<br>
JBoss Drools Core Development<br>
JBoss by Red Hat @ <a moz-do-not-send="true"
href="http://www.jboss.com">www.jboss.com</a><br>
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