<div dir="ltr">Hi,<div><br></div><div><font face="arial, sans-serif">I need some help understanding why the below 503 is happening.</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">I am logging 503s to a separate file and then querying as below.</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">varnishlog -q "BerespStatus eq <span class="gmail-il" style="">503</span>" -w /whatever/file<br>varnishlog -r /whatever/file</font></div><div><div><br></div></div><div>What's going wrong here ?</div><div>What should I be looking at ?</div><div><br></div><div>Please let me know.</div><div><br></div><div>*   << BeReq    >> 45926757<br>-   Begin          bereq 45926756 pass<br>-   Timestamp      Start: 1618461576.793111 0.000000 0.000000<br>-   BereqMethod    POST<br>-   BereqURL       /index.php?&u=85&tr=aa<br>-   BereqProtocol  HTTP/1.1<br>-   BereqHeader    X-Forwarded-Proto: https<br>-   BereqHeader    X-Forwarded-Port: 443<br>-   BereqHeader    Host: <a href="http://graph.com">graph.com</a><br>-   BereqHeader    X-Amzn-Trace-Id: Root=1-xxx<br>-   BereqHeader    Content-Length: 793<br>-   BereqHeader    sec-ch-ua: "Google Chrome";v="89", "Chromium";v="89", ";Not A Brand";v="99"<br>-   BereqHeader    accept: application/json, text/javascript, */*; q=0.01<br>-   BereqHeader    sec-ch-ua-mobile: ?0<br>-   BereqHeader    user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36<br>-   BereqHeader    content-type: application/x-www-form-urlencoded; charset=UTF-8<br>-   BereqHeader    origin: <a href="https://mandy.">https://mandy.</a>.com<br>-   BereqHeader    sec-fetch-site: same-site<br>-   BereqHeader    sec-fetch-mode: cors<br>-   BereqHeader    sec-fetch-dest: empty<br>-   BereqHeader    referer: <a href="https://mandy.com/">https://mandy.com/</a><br>-   BereqHeader    accept-encoding: gzip, deflate, br<br>-   BereqHeader    accept-language: en-US,en;q=0.9<br>-   BereqHeader    X-Forwarded-For: 103.67.157.20, 10.0.0.170<br>-   BereqHeader    browser: other<br>-   BereqHeader    serverIp: 10.0.3.237<br>-   BereqHeader    serverId: abc01<br>-   BereqHeader    X-Varnish: 45926757<br>-   VCL_call       BACKEND_FETCH<br>-   VCL_return     fetch<br>-   BackendOpen    32 reload_2021-04-13T130756.default 127.0.0.1 8080 127.0.0.1 56176<br>-   BackendStart   127.0.0.1 8080<br>-   Timestamp      Bereq: 1618461577.074387 0.281276 0.281276<br>-   FetchError     http first read error: EOF<br>-   BackendClose   32 reload_2021-04-13T130756.default<br>-   Timestamp      Beresp: 1618461577.074430 0.281319 0.000043<br>-   Timestamp      Error: 1618461577.074434 0.281323 0.000004<br>-   BerespProtocol HTTP/1.1<br>-   BerespStatus   503<br>-   BerespReason   Service Unavailable<br>-   BerespReason   Backend fetch failed<br>-   BerespHeader   Date: Thu, 15 Apr 2021 04:39:37 GMT<br>-   BerespHeader   Server: Varnish<br>-   VCL_call       BACKEND_ERROR<br>-   BerespHeader   Content-Type: text/html; charset=utf-8<br>-   BerespHeader   Retry-After: 5<br>-   VCL_return     deliver<br>-   Storage        malloc Transient<br>-   ObjProtocol    HTTP/1.1<br>-   ObjStatus      503<br>-   ObjReason      Backend fetch failed<br>-   ObjHeader      Date: Thu, 15 Apr 2021 04:39:37 GMT<br>-   ObjHeader      Server: Varnish<br>-   ObjHeader      Content-Type: text/html; charset=utf-8<br>-   ObjHeader      Retry-After: 5<br>-   Length         1288<br>-   BereqAcct      948 793 1741 0 0 0<br>-   End<br></div></div>