5:42 p.m.
I'm repeating this post because I didn't get an answer last time. Is this the
wrong place to report a bug? If so, where is the right place? I'm trying to understand
whether this is really a bug or whether I'm doing something wrong.
I have what looks to me like a Drools bug on a simple drl with declared classes. I'm
using version drools-distribution-5.3.0.Final.
I'm invoking it with this:
StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
List<Object> facts = new ArrayList<Object>();
ksession.execute( facts );
=============================
I get this crash:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sample/Cap
at ASMAccessorImpl_129541121334339192620.getValue(Unknown Source)
at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:103)
at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
at org.mvel2.MVEL.executeExpression(MVEL.java:952)
...
==========================
Here's the drl file:
package com.sample
import com.sample.*;
declare Item
id : int;
end
declare Priority
name : String;
priority : int;
end
declare Cap
item : Item;
name : String
end
rule "split cart into items"
when
then
insert(new Item(1));
insert(new Item(2));
insert(new Item(3));
end
rule "Priorities"
when
then
insert(new Priority("A", 3));
insert(new Priority("B", 2));
insert(new Priority("C", 5));
end
rule "Caps"
when
$i : Item()
$p : Priority($name : name)
then
insert(new Cap($i, $name));
end
rule "test"
when
$i : Item()
Cap(item.id == $i.id)
then
System.out.println("Cap");
end
====================
Some observations:
- If I comment out any of the insert lines, the crash goes away
- If I change the first field of class Cap to be id:int instead of item:Item and make the
corresponding changes, the crash goes away
5:53 p.m.
It's the right place :)
It sounds like a bug (to me) :(
The core engine developers are trawling through a bunch of urgent bugs for
other requirements and may not answer here immediately.
If you've not heard anything in a week of two, I'd go banging on the door
again...
With kind regards,
Mike
On 17 April 2012 16:42, Shur, Bob <robert.shur(a)hp.com> wrote:
I'm repeating this post because I didn't get an answer last
time. Is this
the wrong place to report a bug? If so, where is the right place? I'm
trying to understand whether this is really a bug or whether I'm doing
something wrong.
I have what looks to me like a Drools bug on a simple drl with declared
classes. I'm using version drools-distribution-5.3.0.Final.
I'm invoking it with this:
StatelessKnowledgeSession ksession =
kbase.newStatelessKnowledgeSession();
List<Object> facts = new ArrayList<Object>();
ksession.execute( facts );
=============================
I get this crash:
Exception in thread "main" java.lang.NoClassDefFoundError:
com/sample/Cap
at ASMAccessorImpl_129541121334339192620.getValue(Unknown Source)
at
org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
at
org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:103)
at
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
at org.mvel2.MVEL.executeExpression(MVEL.java:952)
...
==========================
Here's the drl file:
package com.sample
import com.sample.*;
declare Item
id : int;
end
declare Priority
name : String;
priority : int;
end
declare Cap
item : Item;
name : String
end
rule "split cart into items"
when
then
insert(new Item(1));
insert(new Item(2));
insert(new Item(3));
end
rule "Priorities"
when
then
insert(new Priority("A", 3));
insert(new Priority("B", 2));
insert(new Priority("C", 5));
end
rule "Caps"
when
$i : Item()
$p : Priority($name : name)
then
insert(new Cap($i, $name));
end
rule "test"
when
$i : Item()
Cap(item.id == $i.id)
then
System.out.println("Cap");
end
====================
Some observations:
- If I comment out any of the insert lines, the crash goes away
- If I change the first field of class Cap to be id:int instead of
item:Item and make the corresponding changes, the crash goes away
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
6:12 p.m.
If you think it's a bug, follow the instructions here on how to submit a
unit test demonstrating your bug:
https://hudson.jboss.org/hudson/job/droolsjbpm-knowledge/lastSuccessfulBu...
Mark
On 17/04/2012 16:42, Shur, Bob wrote:
I'm repeating this post because I didn't get an answer last
time. Is this the wrong place to report a bug? If so, where is the right place? I'm
trying to understand whether this is really a bug or whether I'm doing something
wrong.
I have what looks to me like a Drools bug on a simple drl with declared classes. I'm
using version drools-distribution-5.3.0.Final.
I'm invoking it with this:
StatelessKnowledgeSession ksession = kbase.newStatelessKnowledgeSession();
List<Object> facts = new ArrayList<Object>();
ksession.execute( facts );
=============================
I get this crash:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sample/Cap
at ASMAccessorImpl_129541121334339192620.getValue(Unknown Source)
at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:103)
at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
at org.mvel2.MVEL.executeExpression(MVEL.java:952)
...
==========================
Here's the drl file:
package com.sample
import com.sample.*;
declare Item
id : int;
end
declare Priority
name : String;
priority : int;
end
declare Cap
item : Item;
name : String
end
rule "split cart into items"
when
then
insert(new Item(1));
insert(new Item(2));
insert(new Item(3));
end
rule "Priorities"
when
then
insert(new Priority("A", 3));
insert(new Priority("B", 2));
insert(new Priority("C", 5));
end
rule "Caps"
when
$i : Item()
$p : Priority($name : name)
then
insert(new Cap($i, $name));
end
rule "test"
when
$i : Item()
Cap(item.id == $i.id)
then
System.out.println("Cap");
end
====================
Some observations:
- If I comment out any of the insert lines, the crash goes away
- If I change the first field of class Cap to be id:int instead of item:Item and make the
corresponding changes, the crash goes away
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
6:21 p.m.
With a StatelessKnowledgeSession you are supposed to insert all of your facts
you want in Working Memory via the execute method call, and you don't insert
any facts later on.
What you want to do needs a StatefulKnowledgeSession.
-W
On 17/04/2012, Shur, Bob <robert.shur(a)hp.com> wrote:
I'm repeating this post because I didn't get an answer last
time. Is this
the wrong place to report a bug? If so, where is the right place? I'm trying
to understand whether this is really a bug or whether I'm doing something
wrong.
I have what looks to me like a Drools bug on a simple drl with declared
classes. I'm using version drools-distribution-5.3.0.Final.
I'm invoking it with this:
StatelessKnowledgeSession ksession =
kbase.newStatelessKnowledgeSession();
List<Object> facts = new ArrayList<Object>();
ksession.execute( facts );
=============================
I get this crash:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sample/Cap
at ASMAccessorImpl_129541121334339192620.getValue(Unknown Source)
at
org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:103)
at
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
at org.mvel2.MVEL.executeExpression(MVEL.java:952)
...
==========================
Here's the drl file:
package com.sample
import com.sample.*;
declare Item
id : int;
end
declare Priority
name : String;
priority : int;
end
declare Cap
item : Item;
name : String
end
rule "split cart into items"
when
then
insert(new Item(1));
insert(new Item(2));
insert(new Item(3));
end
rule "Priorities"
when
then
insert(new Priority("A", 3));
insert(new Priority("B", 2));
insert(new Priority("C", 5));
end
rule "Caps"
when
$i : Item()
$p : Priority($name : name)
then
insert(new Cap($i, $name));
end
rule "test"
when
$i : Item()
Cap(item.id == $i.id)
then
System.out.println("Cap");
end
====================
Some observations:
- If I comment out any of the insert lines, the crash goes away
- If I change the first field of class Cap to be id:int instead of item:Item
and make the corresponding changes, the crash goes away
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
9:04 a.m.
We reimplemented the biggest part of the constraints evaluation in the 5.4,
so this problem is fixed on the last drools release as a side effect of that
rewriting. However I've been able to reproduce this issue on the 5.3 branch
and I am working to fix it also there.
Thanks for reporting this,
Mario
--
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Sent from the Drools: User forum mailing list archive at Nabble.com.
10:22 a.m.
I opened a ticket on our issue tracking:
https://issues.jboss.org/browse/JBRULES-3468
I also just finished to fix the problem. The fix will be available on the
upcoming 5.3.2 release.
Thanks again,
Mario
--
View this message in context:
http://drools.46999.n3.nabble.com/rules-users-Drools-crash-on-simple-drl-...
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4412
days inactive
4413
days old
5 comments
5 participants
participants (5)
-
Mario Fusco -
Mark Proctor -
Michael Anstis -
Shur, Bob -
Wolfgang Laun