IllegalStateException when using List data type in Human Task

Solution Verified - Updated -

Issue

When Human Task includes variable with List data type, and Remote API is used for interaction with this Human Task, then following exception is thrown:

org.kie.remote.client.api.exception.RemoteApiException: IllegalStateException thrown with message 'Could not unmarshall user-defined class instance parameter of type 'jaxbListWrapper'': 
java.lang.IllegalStateException: Could not unmarshall user-defined class instance parameter of type 'jaxbListWrapper

Environment

  • Red Hat JBoss BPM Suite
    • 6.1.x

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