Vaadin Designer - failed to load widgetset

Hello, I’m new to Vaadin. I’m using version of the Vaadin Eclipse plugin on Ubuntu 12.04 (Eclipse Juno).

I successfully created a new Vaadin Composite using the wizard but have since run into two issues:

  1. When I click on the Design tab I get the following error:

Failed to load the widgetset:/VAADIN/widgetsets/com.vaadin.visualdesigner.server.VisualDesignerApplicationWidgetset/

I start Eclipse from the terminal and get the following output at this point:

clive@cooler-master:~$ org.eclipse.jst.j2ee.internal.deployables.JEEFlattenParticipantProvider
2012-11-29 16:47:02.232::INFO: Logging to STDERR via org.mortbay.log.StdErrLog
2012-11-29 16:47:02.258::INFO: jetty-6.1.16
Nov 29, 2012 4:47:02 PM com.vaadin.terminal.gwt.server.AbstractApplicationServlet checkProductionMode

Vaadin is running in DEBUG MODE.
Add productionMode=true to web.xml to disable debug features.
To show debug window, add ?debug to your application URL.

Nov 29, 2012 4:47:02 PM org.icepush.servlet.MainServlet
ICEsoft Technologies Inc.
ICEpush 0.0.1 Development
Build number: xxx
Revision: ${revision}

2012-11-29 16:47:02.303::INFO: Started SelectChannelConnector@
Jetty started at http://localhost:56396

  1. If I then switch from the Design tab to the Source tab and back again to the Design tab, I then get the following error in the Design pane:

Unable to load page
Problem occurred while loading the URL http://localhost:37709/
Cannot resolve proxy hostname ()

Does anyone have some idea how I can fix this set-up issue? Thank you.


Please try updating to latest experimental build of Visual Designer. Just set the plugin repository to and install vaadin plugin from there.

Thank you for the quick reply, Joonas. I have now updated to version of the Vaadin plugin. The two error messages are still generated. If I use my system web browser (i.e. not the Eclipse browser), I can see the Designer at http://localhost:[Jetty port number here]

Sounds strange. This should not happen. I would try the plugin with a clean eclipse installation to see if the problem lies in there.

I tried the same project on another instance of Eclipse (plugin version and the Designer works fine there, so I must have a dirty Eclipse installation on the other machine. Thanks Joonas!