<div dir="ltr">Hi Geoff, <div><br></div><div>Thank you for your suggestion.  My current settings:</div><div><b><br></b></div><div><div>backend default {</div><div>  .host = "IP";</div><div>  .port = "8080";</div><div>  .connect_timeout = 60s;</div><div>  .first_byte_timeout = 60s;</div><div>  .between_bytes_timeout = 60s;</div><div>  .max_connections = 800;</div><div><br></div><div>}</div></div><div><br></div><div>The log screen: <a href="http://i.imgur.com/RixRgM3.png">http://i.imgur.com/RixRgM3.png</a><br></div><div><br></div><div><img src="cid:ii_ivryqkwg1_158868d17147a85f" width="528" height="304"></div><div><br></div><div>And the <b>http first read error: EOF</b>  continues.<br></div><div><br></div><div>Thanks.</div><div><br></div><div><br>​<br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-11-21 13:53 GMT+03:00 Geoff Simmons <span dir="ltr"><<a href="mailto:geoff@uplex.de" target="_blank">geoff@uplex.de</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 11/21/2016 10:34 AM, Ayberk Kimsesiz wrote:<br>
><br>
> Varnishlog:  *FetchError     http first read error: EOF*<br>
<br>
That's a first byte timeout.<br>
<br>
> *-   FetchError     http first read error: EOF* -   BackendClose<br>
<span class="">> 160 boot.default -   Timestamp      Beresp: 1479720457.535409<br>
> 60.000158 60.000088 -   Timestamp      Error: 1479720457.535417<br>
> 60.000165 0.000008<br>
<br>
</span>The Timestamp is telling you (2nd and 3rd numbers after<br>
Timestamp:Beresp) that your backend "boot.default" didn't send a<br>
response for 60 seconds before Varnish gave up, presumably because<br>
first_byte_timeout=60s.<br>
<br>
man vsl(7) tells you how to interpret the Timestamp log entries:<br>
<br>
<a href="https://www.varnish-cache.org/docs/trunk/reference/vsl.html#timestamps" rel="noreferrer" target="_blank">https://www.varnish-cache.org/<wbr>docs/trunk/reference/vsl.html#<wbr>timestamps</a><br>
<br>
<a href="https://www.varnish-cache.org/docs/trunk/reference/vsl.html#backend-fetch-timestamps" rel="noreferrer" target="_blank">https://www.varnish-cache.org/<wbr>docs/trunk/reference/vsl.html#<wbr>backend-fetch-timestamps</a><br>
<br>
So you need to fix your backend.<br>
<br>
<br>
HTH,<br>
Geoff<br>
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