[jboss-jira] [JBoss JIRA] Created: (JBRULES-506) Exception thrown when retract, reassert and retract again
Exception thrown when retract, reassert and retract again
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Key: JBRULES-506
URL: http://jira.jboss.com/jira/browse/JBRULES-506
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 3.0.4, 3.0.1
Reporter: Leo Liang
Assigned To: Mark Proctor
Attachments: Fact.java, test.drl, TestDriver.java
In one rule retract the object and re-assert it, then retract the object again in the
following activated rule. A null pointer exception will occur at this time.
java.lang.NullPointerException
at org.drools.reteoo.TerminalNode.retractTuple(TerminalNode.java:216)
at org.drools.reteoo.LeftInputAdapterNode.retractObject(LeftInputAdapterNode.java:207)
at org.drools.reteoo.ObjectSource.propagateRetractObject(ObjectSource.java:141)
at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:180)
at org.drools.reteoo.Rete.retractObject(Rete.java:150)
at org.drools.reteoo.ReteooRuleBase.retractObject(ReteooRuleBase.java:207)
at org.drools.reteoo.ReteooWorkingMemory.doRetract(ReteooWorkingMemory.java:77)
at org.drools.common.AbstractWorkingMemory.retractObject(AbstractWorkingMemory.java:668)
at org.drools.base.DefaultKnowledgeHelper.retractObject(DefaultKnowledgeHelper.java:86)
at com.ericsson.ruletest.debug.Rule_test2_0.consequence(Rule_test2_0.java:8)
at
com.ericsson.ruletest.debug.Rule_test2_0ConsequenceInvoker.evaluate(Rule_test2_0ConsequenceInvoker.java:22)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:437)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:407)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:269)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:256)
at com.ericsson.ruletest.TestDriver.main(TestDriver.java:26)
The given test case is the the simplified from my production code.
--------------- test.drl ------------------------
package com.ericsson.ruletest.debug
import com.ericsson.ruletest.Fact;
rule "test1"
salience 10
no-loop true
when
input:Fact();
then
retract(input);
assert(input);
end;
rule "test2"
salience 0
no-loop true
when
input:Fact();
then
retract(input);
end;
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