[Varnish] #1112: Varnish delivers truncated files when serving from Tomcat7 Backend and ESI enabled

[Varnish]

#1112: Varnish delivers truncated files when serving from Tomcat7 Backend and ESI
enabled
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 Reporter:  derjohn  |        Type:  defect
   Status:  new      |    Priority:  normal
Milestone:           |   Component:  build 
  Version:  3.0.2    |    Severity:  normal
 Keywords:           |  
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 Hello,
 in our setup we have a varnish in front of several Tomcat7. When Tomcat7
 delivers static content, it uses chunked tranfers.

 We'hit by a bug in that combination. The user gets the static content
 (e.g. jquery.js) and receives a 200 status, but the content sometimes (!)
 is not transferred completely. E.G. there jquery.js get truncated after
 some kilobytes. My observation was, that this happens mostly (only?) if
 the backend is reused.

 In the logs I see such error msgs, which correlate to the error:

   19 Debug        c Hit send timeout, wrote = 11680/21115; retrying
   19 Debug        c Write error, retval = -1, len = 9435, errno = Resource
 temporarily unavailable

 To test I use a simple script like that and look if the outputs is always
 the same or not:

  for i in $(seq 1 1000); do curl -s -x "" -k
 'http://$HOST/...011_jquery-1.7.1.js' | md5sum ; done

 I tried varnish 3.0.2 and some newer trunks, the effect is still the same.

 The same setup runs with the same config with varnish2.1.5 fine. (I had to
 adapt the config parts of ESI enabling, as the syntax changed from 2.x to
 3.x).

 rgds,
 derjohn

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1112>
Varnish <https://varnish-cache.org/>
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