Parsoid doesn't work when you add the visualeditor role in Labs-Vagrant setup,
clients get 404 errors. After tweaking parsoid to log the actual error (bug 57694), /var/log/upstart/parsoid.log contains

Stack trace: DoesNotExistError: Page Fetch failure for null : Error: Invalid URI
"undef/w/api.php?format=json&action=query&meta=siteinfo&siprop=namespaces%7Cnamespacealiases%7Cmagicwords%7Cfunctionhooks%7Cextensiontags%7Cgeneral%7Cinterwikimap%7Clanguages%7Cprotocols"

Obviously undef/w/api.php is going to give 404.

The bad URL path arises because puppet/manifests/roles.pp sets $server_url to 'undef' if forwarded_port isn't set, and it somehow isn't set in labs-vagrant. puppet/modules/mediawiki/templates/parsoid.localsettings.js.erb propagates this to /srv/parsoid/js/api/localsettings.js which contains

parsoidConfig.setInterwiki( 'localhost', 'undef/w/api.php' )

(Erik Bernhardson figured all this out!)

One fix is to not set $server_url to undef. Patch coming.

Version: unspecified
Severity: normal