Notification problems in eclipse -

i've installed eclipse in ubuntu 12.04 , every time open eclipse error:

an internal error occurred during "fetch notifications" internal error occurred during: "fetch notifications". java.lang.exceptionininitializererror internal error occurred during: "get notification settings url". not initialize class com.vaadin.integration.eclipse.notifications.model.notificationsservice 

the pplugins installed vaadin , svn. i'm not having kind of problem on machine, although runs on window, i'm not sure whether left off...any idea?

sign-in vaadin account notification feeds @ bottom right (bell icon) , problem go away.