Last modified: 2013-03-29 21:39:07 UTC
To reproduce: Go to the Commons site in the beta cluster. Don't log in. Go to the sandbox: http://commons.wikimedia.beta.wmflabs.org/w/index.php?title=Commons:Sandbox&action=edit&redlink=1 Try adding some test text in the body and in the summary. Hit the "Save page" button. Result: ERROR The requested URL could not be retrieved While trying to retrieve the URL: http://commons.wikimedia.beta.wmflabs.org/w/index.php? The following error was encountered: Zero Sized Reply Squid did not receive any data for this request. Your cache administrator is benapetr@gmail.com. Generated Fri, 12 Oct 2012 21:45:50 GMT by squid001.beta.wmflabs.org (squid/2.7.STABLE9)
Must have been intermittent. Works now.
It just happened to me while logging in.
*** Bug 41004 has been marked as a duplicate of this bug. ***
Just like the production cluster, there is a load balancer. When navigating the site a squid is semi-randomly chosen from a pool. squid001 is the problematic one. And it appears to only fail for POST request (logging in, saving/previewing edits, changing user rights etc.)
Beta has only one squid which load balance requests to two apaches instances: deployment-apache32 and deployment-apache33. If someone is wiling to investigate, the instance is deployment-squid , logs are in /var/log/squid.
Might have ended up being fixed somehow or it was an intermittent failure. We have some edits being done on the wikis via Selenium and there is no such error anymore :]