Guvnor 5.5 - Build package getting: unable to parse xml : Exception class java.lang.NullPointerException : null

[kawest173713]

I created a process definition thru Guvnor 5.5 using Web Designer 2.4. Placed the ArbitraryCycles workflow pattern into this process definition, and added a start and end node, as well as modified all of the tasks to be script tasks, to which I added println statements. Added conditions on the diverging gateways. Added some variables to be used in those conditions. Fixed up all the Simulation probabilities to not go over 100% for the diverging gateways. Did a "Validate process" on the process, which came back with no errros. Saved it in the defaultPackage.

When I view the process in the defaultPackage, the "Valid" column shows a red "X". next to the process name. But no indication as to what the problem is.

When I try and perform a "Build package" with this process, a line is displayed with the following text: "unable to parse xml : Exception class java.lang.NullPointerException : null". Nothing is displayed in the server log.

I've attached the process to this post.

It would be helpful if a) the validation would pick up whatever error that the build package is running into, and indicate what the problem is, or b) the build package gave more information as to what the problem is.

Any ideas on what in the process is causing this?

Also, when I transfer this process to Eclipse (Kepler, with the BPMN2 Modeler v 0.2.7, jBPM Eclipse Plugin 5.5), and try to run it via a simple Java test class, I get the following error there:

java.lang.NullPointerException

at org.jbpm.ruleflow.core.validation.RuleFlowProcessValidator.validateNodes(RuleFlowProcessValidator.java:193)

at org.jbpm.ruleflow.core.validation.RuleFlowProcessValidator.validateProcess(RuleFlowProcessValidator.java:117)

at org.jbpm.ruleflow.core.validation.RuleFlowProcessValidator.validateProcess(RuleFlowProcessValidator.java:555)

at org.jbpm.compiler.ProcessBuilderImpl.buildProcess(ProcessBuilderImpl.java:124)

at org.jbpm.compiler.ProcessBuilderImpl.addProcessFromXml(ProcessBuilderImpl.java:267)

at org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:673)

at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:709)

at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51)

at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:40)

at com.sample.ArbitraryCycleTest.readKnowledgeBase(ArbitraryCycleTest.java:43)

at com.sample.ArbitraryCycleTest.main(ArbitraryCycleTest.java:23)

62 12/09 16:55:21,641[main] ERROR builder.impl.KnowledgeBuilderImpl.newKnowledgeBase - ProcessLoadError: unable to parse xml : Exception class

java.lang.NullPointerException : null

java.lang.IllegalArgumentException: Could not parse knowledge.

at org.drools.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase(KnowledgeBuilderImpl.java:79)

at com.sample.ArbitraryCycleTest.readKnowledgeBase(ArbitraryCycleTest.java:44)

at com.sample.ArbitraryCycleTest.main(ArbitraryCycleTest.java:23)

I've attached the Java class as well.

Any help/pointers appreciated.

THX

Keith

[swiderski.maciej]

this NPE is caused by missing condition on diverging gateways - XOR or OR, I have looked through the process and indeed there are some exclusiveGateways which have outgoing sequence flows without condition specified. Please make sure that all diverging exclusive gateways have conditions set and that should resolve the problem.

Validation has been enhanced to report this problem instead of NPE in version 6.

HTH

[kawest173713]

Appreciate the guidance. I'd made an assumption when using the BPMN 2 Modeler in Eclipse that when I select 1 of the 2 conditions as the "default", that I didn't need to also add a constraint. The non-default I had entered a condition. When I went back and also entered a condition for each of the default flows to the 3 XOR gateways, got past this issue. THX!