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Evans, Jess wrote:
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<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Possibly,
upon inspection I found an entity class with
suspicious looking hashCode and equals methods (source generate
equals/hashcode
is still to hard for some people it seems). I’m trying to recreate a
simple test case, to reproduce. What’s the simplest rule to generate a
RightTupleIndexHashTable? Will any attribute constraint do e.g.:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">BadClass($value
: value)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">BadClass(value
== $value)</span></p>
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any == constraint against a declaration (pattern bound to a variable)
will produce an indexed join.<br>
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<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">-Jess<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:rules-users-bounces@lists.jboss.org">rules-users-bounces@lists.jboss.org</a>
[<a class="moz-txt-link-freetext" href="mailto:rules-users-bounces@lists.jboss.org">mailto:rules-users-bounces@lists.jboss.org</a>] <b>On Behalf Of </b>Edson
Tirelli<br>
<b>Sent:</b> Wednesday, January 14, 2009 4:43 PM<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> Re: [rules-users] NPE in RightTuple<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><br>
Looks like a bug. Can you please open a JIRA with a test case? My
guess is that your rules are changing a fact attribute that is causing
the
equals()/hashcode() methods of the object to return a different result?<br>
<br>
[]s<br>
Edson<o:p></o:p></p>
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<p class="MsoNormal">2009/1/14 Evans, Jess <<a
moz-do-not-send="true" href="mailto:JEvans@collegeboard.org">JEvans@collegeboard.org</a>><o:p></o:p></p>
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<p>Does anyone know what this would be indicative of? I've seen it
occur
periodically at which point I have to discard the session. I flatten
and
assert my data, run the rules, and then retract the handles collected
on
assertion. I've ensured the fact handle parameter is never null. I
have the stateful session wrapped in a synchronized business façade, so
I don't
think it should be a concurrency issue (unless I have a bug of
course).
I'm running Drools 5 M4.<o:p></o:p></p>
<p> <o:p></o:p></p>
<p>java.lang.NullPointerException<o:p></o:p></p>
<p> at
org.drools.util.RightTupleIndexHashTable.remove(RightTupleIndexHashTable.java:224)<o:p></o:p></p>
<p> at
org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:204)<o:p></o:p></p>
<p> at
org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:210)<o:p></o:p></p>
<p> at
org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:190)<o:p></o:p></p>
<p> at
org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1078)<o:p></o:p></p>
<p> at
org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1045)<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
rules-users mailing list<br>
<a moz-do-not-send="true" href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
<a moz-do-not-send="true"
href="https://lists.jboss.org/mailman/listinfo/rules-users"
target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><o:p></o:p></p>
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<p class="MsoNormal"><br>
<br clear="all">
<br>
-- <br>
Edson Tirelli<br>
JBoss Drools Core Development<br>
JBoss, a division of Red Hat @ <a moz-do-not-send="true"
href="http://www.jboss.com">www.jboss.com</a><o:p></o:p></p>
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