[jboss-jira] [JBoss JIRA] (DROOLS-4555) Importing DMN model causes NullPointerException

[Jonas Tamimi (Jira)]

Jonas Tamimi created DROOLS-4555:
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             Summary: Importing DMN model causes NullPointerException
                 Key: DROOLS-4555
                 URL: https://issues.jboss.org/browse/DROOLS-4555
             Project: Drools
          Issue Type: Bug
            Reporter: Jonas Tamimi
            Assignee: Mario Fusco


Hi,
this is my first issue, so I hope I did everything right. We have been using version 7.21.0.Final of Drools for the last few months. A few weeks ago we switched to the latest version and could not import a few of our decision models (.dmn) anymore. According to our own research the bug seems to be present since 7.22.0.t042 and is still present in the latest snapshot.

This is the relevant logging output: [https://gist.github.com/oas/ec0f70585411d8c3f0266b7d2fd02ebc|https://gist.github.com/oas/ec0f70585411d8c3f0266b7d2fd02ebc]

I tried to narrow down the exception and it seems to be in the method {{checkVariableName}} of {{org.kie.dmn.feel.parser.feel11.FEELParser}}. {{errorChecker.hasErrors()}} is false, but it is not catched by the if statement in line 111. Because of this, {{errorChecker.getErrors()}} returns null instead of a {{List<FEELEvent>}}.

The method checkVariableName in _org.kie.dmn.core.compiler.DMNCompilerHelper_, assumes that a list will be returned and calls {{isEmpty()}}. This throws the {{NullPointerException}}.



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