[Bug 1456662] Re: squid-deb-proxy fails to resolve dns entry : needs to be restarted

Tue Jun 2 09:51:07 UTC 2015

debdiff from the fix in Wily

** Patch added: "lp1456662_sru_upstart.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/squid-deb-proxy/+bug/1456662/+attachment/4408486/+files/lp1456662_sru_upstart.debdiff

** Description changed:

+ [SRU justification]
+ In some race situation, squid-deb-proxy is unable to operate and needs to be restarted.
+ 
+ [Impact]
+ Requires manual intervention from system administrator to function correctly.
+ 
+ [Fix]
+ Change the "start on" upstart statement to match the one used by squid3
+ 
+ [Test Case]
+ See Original description.
+ 
+ [Regression]
+ None expected as the same statement is already in use in the squid3 package and in the upstream debian package.
+ 
+ [ORiginal description of the problem]
+ 
  In some specific context that I currently cannot identify (i.e. happens
  everytime on my server but never in VMs), after a reboot, squid-deb-
  proxy fails to resolve DNS entries for URL that it needs to service. The
  problem seems systematic on the hardware that I have.

  Release : Trusty (squid-deb-proxy_0.8.6)

Test :
  1) Reboot squid-deb-proxy server
  2) From some client, issue :
  $ telnet {squid-deb-proxy-server} 8000
  GET http://fr.archive.ubuntu.com/ubuntu/dists/wily/InRelease
  Trying 192.168.1.11...
  Connected to avogadro.
  Escape character is '^]'.
  HTTP/1.1 503 Service Unavailable
  Server: squid/3.3.8
  Mime-Version: 1.0
  Date: Tue, 19 May 2015 14:21:51 GMT
  Content-Type: text/html
  Content-Length: 3287
  X-Squid-Error: ERR_DNS_FAIL 0
  Vary: Accept-Language
  Content-Language: en
  X-Cache: MISS from squid-deb-proxy
  X-Cache-Lookup: MISS from squid-deb-proxy:8000
  Via: 1.1 squid-deb-proxy (squid/3.3.8)
  Connection: close
  <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
  <html><head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>ERROR: The requested URL could not be retrieved</title>
  <style type="text/css"><!--
   /*
   Stylesheet for Squid Error pages
   Adapted from design by Free CSS Templates
   http://www.freecsstemplates.org
   Released for free under a Creative Commons Attribution 2.5 License
  */
  ...
  <div id="content">
  <p>The following error was encountered while trying to retrieve the URL: <a href="http://fr.archive.ubuntu.com/ubuntu/dists/wily/InRelease">http://fr.archive.ubuntu.com/ubuntu/dists/wily/InRelease</a></p>

  <blockquote id="error">
  <p><b>Unable to determine IP address from host name <q>fr.archive.ubuntu.com</q></b></p>
  </blockquote>

  <p>The DNS server returned:</p>
  <blockquote id="data">
  <pre>No DNS records</pre>
  </blockquote>

  <p>This means that the cache was not able to resolve the hostname
  presented in the URL. Check if the address is correct.</p>

  <p>Your cache administrator is <a href="mailto:webmaster?subject=CacheErrorInfo%20-%20ERR_DNS_FAIL&body=CacheHost%3A%20squid-deb-proxy%0D%0AErrPage%3A%20ERR_DNS_FAIL%0D%0AErr%3A%20%5Bnone%5D%0D%0ADNS%20ErrMsg%3A%20No%20DNS%20records%0D%0ATimeStamp%3A%20Tue,%2019%20May%202015%2014%3A21%3A51%20GMT%0D%0A%0D%0AClientIP%3A%20192.168.1.10%0D%0A%0D%0AHTTP%20Request%3A%0D%0AGET%20%2Fubuntu%2Fdists%2Fwily%2FInRelease%20HTTP%2F0.9%0A%0D%0A%0D%0A">webmaster</a>.</p>
  <br>

  Restarting the squid-deb-proxy service fixes the problem

-- 
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https://bugs.launchpad.net/bugs/1456662

Title:
  squid-deb-proxy fails to resolve dns entry : needs to be restarted

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