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Thread: java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWTBridge

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  1. #1

    Default java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWTBridge

    I am using gxt-2.3.1a-gwt22.jar with GWT 2.6.0.

    getting below error while running in tomcat at production mode.

    java.lang.NoClassDefFoundError: com/google/gwt/core/client/GWTBridge
    at com.extjs.gxt.ui.client.core.FastMap.<init>(

    It is being referred from GWT class setBridge( )

    GWTBridge is not available in gwt-servlet.jar

  2. #2
    Sencha Premium Member
    Join Date
    Jul 2012


    I switched from GXT 2.2.5 to GXT 2.3.1a and stumbled into the exact same problem.

    There are 2 possible ways to fix it:

    1) add requestfactory-server.jar from the GWT distribution to your WEB-INF/lib and to your classpath


    2) create the following class in your project, in the package

    * Date: 1/17/13
    * Time: 12:37 PM
    * This class is used for fixing class not found;
    * This is only needed for GXT 2 to work. Once we remove GXT2, this can be removed also.
    public abstract class GWTBridge extends {
    Edit: I tried both solutions and only the first one worked successfully for me.

    With the second solution, I occasionally encountered errors of this kind:

    Exception while dispatching incoming RPC call: Type 'it.netstudio.totem.core.web.client.mvc.model.ParameterVO' was not assignable to '' and did not have a custom field serializer.For security purposes, this type will not be serialized.: instance = [email protected]d

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