<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:#0b5394">Something else that I found out is that no request is actually being made to the backend server (at least nothing shows up in the log). It looks like varnish is not even trying to fetch the page...</div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:#0b5394"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small;color:#0b5394">Albert</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 17, 2016 at 5:35 PM, Albert Tollkuçi <span dir="ltr"><<a href="mailto:albert.tollkuci@gmail.com" target="_blank">albert.tollkuci@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">Hello,</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">I configured varnish a few weeks ago and things were running OK. Suddently yesterday it stopped working with the following error:</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><h1 style="color:rgb(0,0,0);font-family:"Times New Roman""><i>Error 503 Backend fetch failed</i></h1><p style="color:rgb(0,0,0);font-family:"Times New Roman";font-size:medium"><i>Backend fetch failed</i></p><h3 style="color:rgb(0,0,0);font-family:"Times New Roman""><i>Guru Meditation:</i></h3><p style="color:rgb(0,0,0);font-family:"Times New Roman";font-size:medium"><i>XID: 208396</i></p></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">Here it's the result of varnishlog:</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><br></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><div><i>* << Request >> 65581</i></div><div><i>- Begin req 2 rxreq</i></div><div><i>- Timestamp Start: 1466080309.362022 0.000000 0.000000</i></div><div><i>- Timestamp Req: 1466080309.362022 0.000000 0.000000</i></div><div><i>- ReqStart 66.249.64.175 47813</i></div><div><i>- ReqMethod GET</i></div><div><i>- ReqURL /lajme/c66d2a2515/news.aspx</i></div><div><i>- ReqProtocol HTTP/1.1</i></div><div><i>- ReqHeader Host: <a href="http://time.ikub.al" target="_blank">time.ikub.al</a></i></div><div><i>- ReqHeader Connection: Keep-alive</i></div><div><i>- ReqHeader Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8</i></div><div><i>- ReqHeader From: googlebot(at)<a href="http://googlebot.com" target="_blank">googlebot.com</a></i></div><div><i>- ReqHeader User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1; +<a href="http://www.google.com/bot.html" target="_blank">http://www.google.com/bot.html</a>)</i></div><div><i>- ReqHeader Accept-Encoding: gzip,deflate,br</i></div><div><i>- ReqHeader If-Modified-Since: Wed, 15 Jun 2016 07:10:05 UTC</i></div><div><i>- ReqHeader X-Forwarded-For: 66.249.64.175</i></div><div><i>- VCL_call RECV</i></div><div><i>- ReqUnset Host: <a href="http://time.ikub.al" target="_blank">time.ikub.al</a></i></div><div><i>- ReqHeader Host: <a href="http://time.ikub.al" target="_blank">time.ikub.al</a></i></div><div><i>- ReqURL /lajme/c66d2a2515/news.aspx</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- VCL_return hash</i></div><div><i>- ReqUnset Accept-Encoding: gzip,deflate,br</i></div><div><i>- ReqHeader Accept-Encoding: gzip</i></div><div><i>- VCL_call HASH</i></div><div><i>- VCL_return lookup</i></div><div><i>- Debug "XXXX MISS"</i></div><div><i>- VCL_call MISS</i></div><div><i>- ReqHeader x-state: MISS</i></div><div><i>- VCL_return fetch</i></div><div><i>- Link bereq 65582 fetch</i></div><div><i>- Timestamp Fetch: 1466080309.362211 0.000190 0.000190</i></div><div><i>- RespProtocol HTTP/1.1</i></div><div><i>- ^C</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- ReqHeader Cookie:</i></div><div><i>- ReqUnset Cookie:</i></div><div><i>- VCL_return hash</i></div><div><i>- ReqUnset Accept-Encoding: gzip,deflate,br</i></div><div><i>- ReqHeader Accept-Encoding: gzip</i></div><div><i>- VCL_call HASH</i></div><div><i>- VCL_return lookup</i></div><div><i>- Debug "XXXX MISS"</i></div><div><i>- VCL_call MISS</i></div><div><i>- ReqHeader x-state: MISS</i></div><div><i>- VCL_return fetch</i></div><div><i>- Link bereq 32810 fetch</i></div><div><i>- Timestamp Fetch: 1466080311.215487 0.000181 0.000181</i></div><div><i><b>- RespProtocol HTTP/1.1</b></i></div><div><i><b>- RespStatus 503</b></i></div><div><i><b>- RespReason Backend fetch failed</b></i></div><div><i>- RespHeader Date: Thu, 16 Jun 2016 12:31:51 GMT</i></div><div><i>- RespHeader Server: Varnish</i></div><div><i>- RespHeader Content-Type: text/html; charset=utf-8</i></div><div><i>- RespHeader Retry-After: 5</i></div><div><i>- RespHeader X-Varnish: 32809</i></div><div><i>- RespHeader Age: 0</i></div><div><i>- RespHeader Via: 1.1 varnish-v4</i></div><div><i>- VCL_call DELIVER</i></div><div><i>- RespHeader X-Cache: MISS</i></div><div><i>- RespHeader X-Cache-Hits: 0</i></div><div><i>- RespUnset Server: Varnish</i></div><div><i>- RespUnset X-Varnish: 32809</i></div><div><i>- RespUnset Via: 1.1 varnish-v4</i></div><div><i>- VCL_return deliver</i></div><div><i>- Timestamp Process: 1466080311.215512 0.000206 0.000025</i></div><div><i>- RespHeader Content-Length: 282</i></div><div><i>- Debug "RES_MODE 2"</i></div><div><i>- RespHeader Connection: keep-alive</i></div><div><i>- Timestamp Resp: 1466080311.215539 0.000233 0.000027</i></div><div><i>- Debug "XXX REF 1"</i></div><div><i>- ReqAcct 389 0 389 215 282 497</i></div></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><br></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">I have tested the same page with:</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><br></div><div><b><font color="#0b5394" face="verdana, sans-serif">curl <a href="http://time.ikub.al/lajme/c66d2a2515/news.aspx" target="_blank">time.ikub.al/lajme/c66d2a2515/news.aspx</a></font><br></b></div><div><font color="#0b5394" face="verdana, sans-serif"><br></font></div><div><font color="#0b5394" face="verdana, sans-serif">and it's working fine. Headers from curl are:</font></div><div><font color="#0b5394" face="verdana, sans-serif"><br></font></div><div><font color="#0b5394" face="verdana, sans-serif"><div><i>* Trying 13.94.212.211...</i></div><div><i>* Connected to <a href="http://time.ikub.al" target="_blank">time.ikub.al</a> (13.94.212.211) port 80 (#0)</i></div><div><i>> HEAD /lajme/c66d2a2515/news.aspx HTTP/1.1</i></div><div><i>> Host: <a href="http://time.ikub.al" target="_blank">time.ikub.al</a></i></div><div><i>> User-Agent: curl/7.43.0</i></div><div><i>> Accept: */*</i></div><div><i>></i></div><div><i>< HTTP/1.1 200 OK</i></div><div><i>HTTP/1.1 200 OK</i></div><div><i>< Cache-Control: private</i></div><div><i>Cache-Control: private</i></div><div><i>< Content-Length: 93606</i></div><div><i>Content-Length: 93606</i></div><div><i>< Content-Type: text/html; charset=utf-8</i></div><div><i>Content-Type: text/html; charset=utf-8</i></div><div><i>< Last-Modified: Fri, 06 Sep 2013 11:50:00 GMT</i></div><div><i>Last-Modified: Fri, 06 Sep 2013 11:50:00 GMT</i></div><div><i>< Server: Microsoft-IIS/8.5</i></div><div><i>Server: Microsoft-IIS/8.5</i></div><div><i>< X-AspNet-Version: 2.0.50727</i></div><div><i>X-AspNet-Version: 2.0.50727</i></div><div><i>< X-Powered-By: <a href="http://ASP.NET" target="_blank">ASP.NET</a></i></div><div><i>X-Powered-By: <a href="http://ASP.NET" target="_blank">ASP.NET</a></i></div><div><i>< Date: Fri, 17 Jun 2016 15:31:24 GMT</i></div><div><i>Date: Fri, 17 Jun 2016 15:31:24 GMT</i></div><div><br></div></font></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">Any idea what may be causing this?</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><br></div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">Thank you,</div><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)">Albert</div><span class="HOEnZb"><font color="#888888"><div style="font-family:verdana,sans-serif;font-size:small;color:rgb(11,83,148)"><br></div><div><br></div>-- <br><div data-smartmail="gmail_signature"><div dir="ltr"><div><div><span style="font-size:small;color:rgb(61,133,198);font-family:"trebuchet ms",sans-serif">Web: </span><a href="http://www.tollkuci.com/" style="font-size:small;font-family:"trebuchet ms",sans-serif" target="_blank">http://www.tollkuci.com</a><br></div><div><span style="color:rgb(61,133,198);font-family:"trebuchet ms",sans-serif;font-size:small">Follow me on: </span><a href="http://www.linkedin.com/in/alberttollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2flinkedin_icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">LinkedIn</a> <a href="https://plus.google.com/+AlbertTollku%C3%A7i/posts" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fgoogleplus-icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Google+</a> <a href="https://www.facebook.com/albert.tollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fFacebook_Icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Facebook</a> <a href="https://twitter.com/AlbertTollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fTwitterIcon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Twitter</a> <a href="http://careers.stackoverflow.com/atollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fcareers-icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Career 2.0</a></div><font style="font-family:"trebuchet ms",sans-serif;color:rgb(102,102,102)"><hr style="color:rgb(34,34,34);font-family:Arial,Verdana,sans-serif;font-size:12px"></font></div><br></div></div>
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div><span style="font-size:small;color:rgb(61,133,198);font-family:'trebuchet ms',sans-serif">Web: </span><a href="http://www.tollkuci.com/" style="font-size:small;font-family:'trebuchet ms',sans-serif" target="_blank">http://www.tollkuci.com</a><br></div><div><span style="color:rgb(61,133,198);font-family:'trebuchet ms',sans-serif;font-size:small">Follow me on: </span><a href="http://www.linkedin.com/in/alberttollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2flinkedin_icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">LinkedIn</a> <a href="https://plus.google.com/+AlbertTollku%C3%A7i/posts" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fgoogleplus-icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Google+</a> <a href="https://www.facebook.com/albert.tollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fFacebook_Icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Facebook</a> <a href="https://twitter.com/AlbertTollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fTwitterIcon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Twitter</a> <a href="http://careers.stackoverflow.com/atollkuci" style="font-family:Arial,Verdana,sans-serif;font-size:12px;margin:0px;padding:0px;color:rgb(31,162,225);text-decoration:none" target="_blank"><img alt="" height="24" src="http://www.tollkuci.com/blog/IMAGES%2f2014%2f02%2fcareers-icon.png.jpgx" width="24" style="margin:2px;padding:0px;vertical-align:middle">Career 2.0</a></div><font style="font-family:'trebuchet ms',sans-serif;color:rgb(102,102,102)"><hr style="color:rgb(34,34,34);font-family:Arial,Verdana,sans-serif;font-size:12px"></font></div><br></div></div>
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