[jboss-jira] [JBoss JIRA] Commented: (JBRULES-506) Exception thrown when retract, reassert and retract again

Exception thrown when retract, reassert and retract again --------------------------------------------------------- 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: 3.0.1, 3.0.4 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;