Exceptions are caught twice in the JBoss ESB action pipeline

Issue

• We are going to develop ESB-endpoint Web Services. If there is an exception in the process of service, the ESB will response with error message in default style.
• However, we want to customize the error message in consistent with our common response message style. So we tried to catch the exception and format the response message in a uniformed way.

        <service category="MyEsbWebServices" description="ESB-endpoint Web Services"
            name="SampleWebService" invmScope="GLOBAL">
            <actions mep="RequestResponse" inXsd="SampleRequest.xsd" outXsd="SampleResponse.xsd">
                <action class="com.example.ws.MyAction1" name="custom-action1">
                    <property name="exceptionMethod" value="processException" />
                </action>
                <action class="org.example.ws.MyAction2" name="custom-action2">
                    <property name="exceptionMethod" value="processException" />
                </action>
            </actions>
        </service>

• It ends up with the exception handler action will be invoked twice. Please advise how to fix this issue.
• The com.example.ws.MyAction1 class looks like the following:

public class MyAction1 extends AbstractActionLifecycle {

    public void processException(final Message message, final Throwable th) {
        System.out.println("Something happened: " + th.getMessage());
        try {
            final ServiceInvoker invoker = new ServiceInvoker("MyEsbWebServices", "AnotherSampleService");
            invoker.deliverSync(message, 2000) ;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }