Vaadin doesn't work with Liferay 6.2

Question

I try to deploy Vaadin Control Panel to Liferay 6.2 portal, but I get message "Vaadin is temporarily unavailable." on portal and error message

"java.lang.NoSuchMethodError: com.liferay.portal.kernel.util.PortalClassInvoker.invoke(Ljava/lang/String;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;"

As I have understood the method was removed in Liferay 6.2 version, but I can't find any available solution.

Is it possible to make it work?

Answer 1

At first you need to use Vaadin 6.8.12. This is the version shipped with Liferay 6.2. You also need to follow the instructions in this forum post and add the following line to liferay-portlet.xml:

<portlet>
    <requires-namespaced-parameters>false</requires-namespaced-parameters>
</portlet>