[JBoss JIRA] Created: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
7:14 a.m.
NullPointerException when the 'result' block of an 'accumulate' function
returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Mark Proctor
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
7:50 p.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=all ]
Mark Proctor updated JBRULES-1091:
----------------------------------
Fix Version/s: 4.0.1
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Mark Proctor
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
8:12 a.m.
New subject: [JBoss JIRA] Assigned: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=all ]
Edson Tirelli reassigned JBRULES-1091:
--------------------------------------
Assignee: Edson Tirelli (was: Mark Proctor)
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
11:24 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=comments#action_12373341 ]
Edson Tirelli commented on JBRULES-1091:
----------------------------------------
Not sure what we can do about this, since a null value is not a valid "fact" for
the engine, and as such, it can't reason over it...
Anyone want to suggest something?
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
3:20 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=comments#action_12373396 ]
Alexandre Gattiker commented on JBRULES-1091:
---------------------------------------------
The intent of the actual business rule that spawned the bug was to use Drools to perform
aggregation, in a similar way to a SQL query. Something like
when
$c:Customer()
$totalPayments:Money()
from accumulate( Payment ( customer == $c) ...
then
...do something with $totalPayments...
The result can be null. Obviously, using Drools syntax rather than collecting Payments in
the RHS is mostly a convenience (though it might bring a performance boost in some
cases).
The bug can be resolved easily by handling the null value in the hashCode call in
DefaultFactHandle. But I assume that you worry about the case when constraints are placed
on the accumulated value.
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
3:54 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=comments#action_12373405 ]
Edson Tirelli commented on JBRULES-1091:
----------------------------------------
Alexander,
Yes, the problem is exactly further constraints on the null value.
I understand that in sql the result could be null, but in drools, it should only be null
if the user does it on purpose, what would be wrong. Such accumulations are always
initialized in the init block:
when
$c:Customer()
$totalPayments:Money()
from accumulate( Payment ( customer == $c, $val : value )
init( Money total = new Money( 0 ); )
action( total.add( $val ); )
reverse( total.subtract( $val ); )
result( total ) )
then
// ...
end
Is my assumption wrong?
So, maybe we can add a null check, so that we can provide a user friendly error message,
but allowing null into the engine has huge drawbacks.
On an unrelated note, did you saw the accumulate functions feature? It may be interesting
for you, doing things like:
when
$c:Customer()
$totalPayments:Number()
from accumulate( Payment ( customer == $c, $val : value )
sum( $val ) )
then
// ...
end
You can also create your own functions in case you want to return custom objects like the
Money object in your example.
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
10:45 a.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=all ]
Edson Tirelli updated JBRULES-1091:
-----------------------------------
Component/s: Reteoo
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
12:12 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=comments#action_12373555 ]
Alexandre Gattiker commented on JBRULES-1091:
---------------------------------------------
Thanks for the tip on accumulate functions. Indeed that is what I developed in my case,
though it doesn't help on the null issue of course.
I agree with your assumption, as I understand that Drools cannot handle null facts. There
is not always a direct null object available, however (such as your example with Money(0),
which lacks a currency). We can still use either the Null Object pattern or a mutable
object (commons-lang), something like
MutableObject(value: $totalPayments:)
from accumulate( Payment ( customer == $c, $val : value )
init( MutableObject total = new MutableObject(); )
action( total.setValue(addNullSafe( $val,
total.getValue()) ); )
result( total ) )
So the bug can only be solved in catching the error early and provide a meaningful error
message.
Thank you very much for your tips. Drools is so elegant it's highly addictive :)
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
5:20 p.m.
New subject: [JBoss JIRA] Closed: (JBRULES-1091) NullPointerException when the 'result' block of an 'accumulate' function returns null
[ http://jira.jboss.com/jira/browse/JBRULES-1091?page=all ]
Edson Tirelli closed JBRULES-1091.
----------------------------------
Resolution: Done
Ok, I added integration tests and null handling code in accumulate. Now if accumulate ever
returns a null value, it will raise a RuntimeDroolsException with appropriate message.
Thanks for reporting.
NullPointerException when the 'result' block of an
'accumulate' function returns null
-------------------------------------------------------------------------------------
Key: JBRULES-1091
URL: http://jira.jboss.com/jira/browse/JBRULES-1091
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.0.GA
Reporter: Alexandre Gattiker
Assigned To: Edson Tirelli
Fix For: 4.0.1
java.lang.NullPointerException
at org.drools.common.DefaultFactHandle.<init>(DefaultFactHandle.java:73)
at
org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:34)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:57)
at
org.drools.common.AbstractFactHandleFactory.newFactHandle(AbstractFactHandleFactory.java:48)
at org.drools.reteoo.AccumulateNode.assertTuple(AccumulateNode.java:176)
at
org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:131)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:20)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:168)
at org.drools.reteoo.Rete.assertObject(Rete.java:168)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:190)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:163)
at
org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1241)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:858)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:822)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:623)
at com.sample.DroolsTest.main(DroolsTest.java:28)
Example rule:
rule "Example"
no-loop true
when
$d: Double()
from accumulate ( m : Message( $value: status ),
init( double total = 0; ),
action( System.out.println($value); ),
result( null )
)
then
System.out.println( "xx");
end
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.jboss.com/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
6910
days inactive
6917
days old
8 comments
3 participants
participants (3)
-
Alexandre Gattiker (JIRA) -
Edson Tirelli (JIRA)
-
Mark Proctor (JIRA)