gridengine-exec does not always start after a reboot. This means queues stay unavailable until someone does this manually.
more info @ {T109412: Enable tools-webgrid-lighttpd-1411.tools.eqiad.wmflabs and build more webgrid hosts}
and
https://wikitech.wikimedia.org/wiki/Incident_documentation/20150817-ToolLabs-WebgridOutage