java.lang.NoSuchMethodError: org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader;

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    activiti.org | 2 months ago
    java.lang.NoSuchMethodError: org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader;
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    Root Cause Analysis

    1. java.lang.NoSuchMethodError

      org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader;

      at com.vaadin.event.ListenerMethod.receiveEvent()
    2. Vaadin
      Button.fireClick
      1. com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
      2. com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
      3. com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193)
      4. com.vaadin.ui.Button.fireClick(Button.java:539)
      4 frames