Okay. Let me set it up and get back to you once i see something in that log. It happens only once/twice a day so could be a while before i get back.
On Thu, 26 Dec, 2019, 3:10 pm Guillaume Quintard, < [email protected]> wrote: > Hi, > > Most probably, varnishncsa isn't going to give you the full picture, so > let's go for the exhaustive way: > > varnishlog -q "BerespStatus eq 503" -w /whatever/file > > > you can then read the logs with > > varnishlog -r /whatever/file > > > (more logging pointers here: > https://docs.varnish-software.com/tutorials/vsl-query/) > > If you can get your hands on a failed transaction, we should be able to > tell you what went wrong. Most probably, you hit a timeout of some sort. Or > it could be that the backend was declared sick, if you have probes. > > -- > Guillaume Quintard > > > On Thu, Dec 26, 2019 at 6:33 AM Maninder Singh <[email protected]> wrote: > >> Hi, >> >> I am facing a strange problem. >> >> I am running varnish 4.1.11 on port 80 which is behind a LB. >> >> Varnish then connects to apache 2.4 ( on port 8080 ) and also have >> php-fpm running. >> >> Now, everything works fine but once in a while I am seeing 503 response >> from varnish for a POST request. During this time there is no log in apache >> also ( neither access log nor error log ). >> >> Where does this request vanish ? >> >> How do I debug this issue ? >> >> Some more details: >> >> * I have varnishncsa turned on with following flags. >> >> ExecStart=/usr/bin/varnishncsa -q 'not (ReqURL ~ >> "\.(js|css|png|jpeg|jpg|ico|gif|swf|woff)" or ReqHeader:User-Agent ~ >> "HTTP-Monitor" or ReqHeader:User-Agent ~ "Monitoring/1.1")' -a -w >> /var/log/varnish/varnishncsa.log -D -f /etc/sysconfig/varnishncsa >> >> Here is the entry in varnish log during that time. >> >> X.X.X.X, LB.IP.0.0 - - [25/Dec/2019:00:26:40 -0600] 2629363 "POST >> http://mydomain.com/LetsCelebrate HTTP/1.1" 503 1288 " >> https://referringdomain.com/LetsCelebrate?hostingUrl=https%3A%2F%2Fxy.abc.com"; >> "Mozilla/5.0 (Linux; Android 9; SM-A920F) AppleWebKit/537.36 (KHTML, like >> Gecko) Chrome/79.0.3945.93 Mobile Safari/537.36" "mydomain.com" miss >> >> In .vcl file I have following set. >> .first_byte_timeout = 120s; >> >> Now, I am not logging varnish to apache requests ( which backend fetch ). >> As you can see above I am only logging client requests. >> >> Is their a way to log client requests like above but then also log >> backend fetch failures to another log file ? >> [ Running 2 instances of varnishncsa ? ] >> >> Any pointers ? >> >> Please let me know. >> >> Thanks. >> >> _______________________________________________ >> varnish-misc mailing list >> [email protected] >> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >> >
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