Hey,
I was cranking along writing rules when all of a sudden JUnit reported an
NPE (see below) during WorkingMemory.fireAllRules(). The rule referenced in
the stack trace is as follows,
rule "Add report periods to the FEQueryList"
when
tr : TimeRange(level == TimeRange.FE, durationInMillis > 0 )
ctx : HashMap()
eval(ctx.containsKey("FEQueryList"))
then
System.out.println("Adding FE period to the list");
Vector v = (Vector)ctx.get("FEQueryList");
HashMap m = new HashMap();
v.add(m);
m.put("st", new Long(tr.getStartTime()));
m.put("et", new Long(tr.getEndTime()));
m.put("relation", "PMI_FE");
retract(tr);
end
The NPE occurs on the retract() on the last line of the consequence.
I'm not exactly sure what to do about it. I suppose I could look at the
code.
Any suggestions?
Thanks.
-MItch
org.drools.spi.ConsequenceException: java.lang.NullPointerException
at org.drools.common.Agenda.fireActivation(Agenda.java:327)
at org.drools.common.Agenda.fireNextItem(Agenda.java:303)
at
org.drools.reteoo.WorkingMemoryImpl.fireAllRules(WorkingMemoryImpl.java:248)
at
org.drools.reteoo.WorkingMemoryImpl.fireAllRules(WorkingMemoryImpl.java:261)
at
com.packetmotion.trinity.gsm.report.RuleEngineTest.testContextBuilderFe2Dail
y(RuleEngineTest.java:358)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRu
nner.java:481)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.
java:347)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner
.java:197)
Caused by: java.lang.NullPointerException
at
org.drools.reteoo.beta.DefaultRightMemory.remove(DefaultRightMemory.java:64)
at org.drools.reteoo.BetaMemory.remove(BetaMemory.java:150)
at org.drools.reteoo.NotNode.retractObject(NotNode.java:178)
at
org.drools.reteoo.ObjectSource.propagateRetractObject(ObjectSource.java:128)
at
org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:152)
at org.drools.reteoo.Rete.retractObject(Rete.java:153)
at
org.drools.reteoo.RuleBaseImpl.retractObject(RuleBaseImpl.java:272)
at
org.drools.reteoo.WorkingMemoryImpl.retractObject(WorkingMemoryImpl.java:601
)
at
org.drools.base.DefaultKnowledgeHelper.retractObject(DefaultKnowledgeHelper.
java:87)
at
com.packetmotion.trinity.sqlgen.ContextBuilder.Rule_Add_report_periods_to_th
e_FEQueryList_0.consequence(Rule_Add_report_periods_to_the_FEQueryList_0.jav
a:23)
at
com.packetmotion.trinity.sqlgen.ContextBuilder.Rule_Add_report_periods_to_th
e_FEQueryList_0ConsequenceInvoker.evaluate(Rule_Add_report_periods_to_the_FE
QueryList_0ConsequenceInvoker.java:22)
at org.drools.common.Agenda.fireActivation(Agenda.java:325)
... 19 more
