<div dir="ltr">Hi,<div>i have a strange issue where varnish suddenly stops sending probes thus declaring a backend healthy or sick till a next restart and i'm unable to determine why. Please note that my backend is able to receive my probes (and actually receives it), and i'm able to get a response every time i go with a curl -H "Host: healthcheck" <a href="http://10.32.161.89/balance_me">10.32.161.89/balance_me</a>, so i'll consider my backend ultimately "good" and "able to respond". </div><div><br></div><div>Thanks a lot for every hint!</div><div>Luca</div><div><br></div><div>This is my backend configuration:</div><div><br></div><div><div>probe backend_check {</div><div> .request = "GET /balance_me HTTP/1.1"</div><div> "Host: healthcheck"</div><div> "Connection: close";</div><div> .timeout = 1s;</div><div> .interval = 2s;</div><div> .window = 5;</div><div> .threshold = 2;</div><div>}</div></div><div><div>backend othaph {</div><div>  .host = "10.32.161.89";</div><div>  .port = "80";</div><div>  .connect_timeout = 1s;</div><div>  .first_byte_timeout  = 20s;</div><div>  .between_bytes_timeout = 20s;</div><div>  .probe = backend_check;</div><div>}</div><div><br></div></div><div>This is my "varnishadm backend.list"</div><div><div>boot.othaph          probe   Healthy 3/5<br></div><div><br></div></div><div>This is the total log of 20 minutes of "varnishlog -g raw -i Backend_health" (please note that above it shows 3/5 while i have only 2 probes sent, apparently)</div><div><div>     0 Backend_health - boot.othaph Back healthy 4--X-RH 2 2 5 0.067021 0.033510 HTTP/1.1 200 OK</div><div>     0 Backend_health - boot.othaph Still healthy 4--X-RH 3 2 5 0.015176 0.027399 HTTP/1.1 200 OK</div></div><div><br></div><div>And this is my "varnishadm backend.list -p"</div><div><div>Backend name          Admin   Probe</div><div>boot.othaph          probe   Healthy 3/5</div><div> Current states good: 3 threshold: 2 window: 5</div><div> Average response time of good probes: 0.027399</div><div> Oldest ================================================== Newest</div><div> --------------------------------------------------------------44 Good IPv4</div><div> --------------------------------------------------------------XX Good Xmit</div><div> --------------------------------------------------------------RR Good Recv</div><div> -------------------------------------------------------------HHH Happy</div></div><div><br></div><div><br></div><div><br></div><div><br></div></div>