Last modified: 2013-03-29 21:39:07 UTC

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Bug 40991 - squid001 gives "Zero Sized Reply" error on POST request
squid001 gives "Zero Sized Reply" error on POST request
Status: RESOLVED WORKSFORME
Product: Wikimedia Labs
Classification: Unclassified
deployment-prep (beta) (Other open bugs)
unspecified
All All
: Normal critical
: ---
Assigned To: Peter Bena
:
: 41004 (view as bug list)
Depends on:
Blocks:
  Show dependency tree / graph
 
Reported: 2012-10-12 21:48 UTC by Sumana Harihareswara
Modified: 2013-03-29 21:39 UTC (History)
7 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---

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Description Sumana Harihareswara 2012-10-12 21:48:20 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)
Comment 1 Sumana Harihareswara 2012-10-12 21:51:23 UTC 
Must have been intermittent. Works now.
Comment 2 Alex Monk 2012-10-12 22:17:23 UTC 
It just happened to me while logging in.
Comment 3 Alex Monk 2012-10-13 15:03:12 UTC 
*** Bug 41004 has been marked as a duplicate of this bug. ***
Comment 4 Krinkle 2012-10-13 15:20:42 UTC 
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.)
Comment 5 Antoine "hashar" Musso (WMF) 2012-10-17 21:21:38 UTC 
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.
Comment 6 Antoine "hashar" Musso (WMF) 2013-03-29 21:39:07 UTC 
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 :]
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