Ruleflow Split (XOR) can't find valid outgoing connection --------------------------------------------------------- Key: DROOLS-1593 URL: https://issues.jboss.org/browse/DROOLS-1593 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.5.0.Final, 7.0.0.CR3 Environment: Drools 7.0.0-SNAPSHOT, Oracle Hotspot 1.8.0_112, KIE-Server, OpenShift DecisionServer Reporter: Duncan Doyle Assignee: Mario Fusco This seems like a regression, as this used to work in 6.4.0.Final, but broke somewhere before 6.5.0.Final. Still broken in 7.0.0-SNAPSHOT. (I actually found it in the OpenShift DecisionServer/KIE-Server image). See this reproducer: https://github.com/DuncanDoyle/ruleflow-split-problem I have a ruleflow-group that has a split-node (XOR Gateway) directly after the start-node. The outgoing sequence flows of that XOR have a Drools LHS that checks whether a fact is present in working memory (in this reproducer it's a String) - exists java.lang.String() - not java.lang.String() Only if that fact exists do I want to continue my ruleflow, if the fact is not there, I stop. I use a StatelessKieSession in which I; - insert a String - start the process - fire the rules This used to work fine in 6.4.0.Final and below, but since 6.5.0.Final I get an exception: {code} org.jbpm.workflow.instance.WorkflowRuntimeException: [test-process:1 - Has Strings?:4] -- XOR split could not find at least one valid outgoing connection for split Has Strings? at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:66) at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:174) at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerNodeInstance(NodeInstanceImpl.java:367) at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:326) at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:72) at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:43) at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:174) at org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:38) at org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:235) at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:443) at org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:208) at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:192) at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:184) at org.drools.core.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:1859) at org.drools.core.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:121) at org.drools.core.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:39) at org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:156) at org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:64) at org.drools.core.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:238) at org.jboss.ddoyle.ruleflow.test.RuleflowTest.testRuleflowWithSingleFire(RuleflowTest.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) Caused by: java.lang.IllegalArgumentException: XOR split could not find at least one valid outgoing connection for split Has Strings? at org.jbpm.workflow.instance.node.SplitInstance.executeStrategy(SplitInstance.java:110) at org.jbpm.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:62) ... 42 more {code} What seems to be causing this is that the rules in the sequence flows are not yet fired when the process arrives at the XOR node, causing it to not be able to find an outgoing connection. What does work is if I add an extra "fireAllRules" command BEFORE the "startProcess" command. In that case the flow behaves as it used to. So I need 2 "fireAllRules" commands. What does NOT work is when I only add a "fireAllRules" command before the startProcess command. In that case the rules in the RFG nodes are not fired (but the XOR does not throw an exception in that case).