philipdnichols opened a new issue, #6468:
URL: https://github.com/apache/incubator-kie-drools/issues/6468
We've recently noticed that if you construct a DMN with a BKM that is
"freshly dragged" into the canvas, the KIE validator and the KIE runtime build
process crashes because of an NPE instead of reporting the actual issue.
```
ERROR [XNIO-1 task-3] : Validation of the DMN Model cannot be performed
because of some runtime exception 'Cannot invoke
"org.kie.dmn.model.api.FunctionDefinition.getExpression()" because the return
value of "org.kie.dmn.model.api.BusinessKnowledgeModel.getEncapsulatedLogic()"
is null'. - {acceptLanguage=en-US,en;q=0.9,es;q=0.8,
correlationId=bceb67fd-0d07-4f79-981a-4011a7a281fc,
decisionModel=1257e115-8218-492f-b168-8f259471254b, gwLanguage=en,
gwLocale=en-US, operation=DECISION_MODEL_VALIDATE_API,
packageId=7cb97fae-78eb-4f63-9279-13fa17a4bd6a, planet=phildesign, star=dvcrnx,
tenant=xapppltfrm}
2025-09-25T14:50:25,061 DEBUG [XNIO-1 task-3] : Validation of the DMN Model
cannot be performed because of some runtime exception 'Cannot invoke
"org.kie.dmn.model.api.FunctionDefinition.getExpression()" because the return
value of "org.kie.dmn.model.api.BusinessKnowledgeModel.getEncapsulatedLogic()"
is null'. - {acceptLanguage=en-US,en;q=0.9,es;q=0.8,
correlationId=bceb67fd-0d07-4f79-981a-4011a7a281fc,
decisionModel=1257e115-8218-492f-b168-8f259471254b, gwLanguage=en,
gwLocale=en-US, operation=DECISION_MODEL_VALIDATE_API,
packageId=7cb97fae-78eb-4f63-9279-13fa17a4bd6a, planet=phildesign, star=dvcrnx,
tenant=xapppltfrm}
java.lang.NullPointerException: Cannot invoke
"org.kie.dmn.model.api.FunctionDefinition.getExpression()" because the return
value of "org.kie.dmn.model.api.BusinessKnowledgeModel.getEncapsulatedLogic()"
is null
at
org.kie.dmn.core.compiler.BusinessKnowledgeModelCompiler.compileNode(BusinessKnowledgeModelCompiler.java:99)
at
org.kie.dmn.core.compiler.DMNCompilerImpl.processDrgElements(DMNCompilerImpl.java:383)
at
org.kie.dmn.core.compiler.DMNCompilerImpl.compile(DMNCompilerImpl.java:220)
at
org.kie.dmn.validation.DMNValidatorImpl$ValidatorBuilderImpl.validateDMNResources(DMNValidatorImpl.java:385)
at
org.kie.dmn.validation.DMNValidatorImpl$ValidatorBuilderImpl.processDMNResourcesAndValidate(DMNValidatorImpl.java:327)
at
org.kie.dmn.validation.DMNValidatorImpl$ValidatorBuilderImpl.theseModels(DMNValidatorImpl.java:319)
```
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