Varnish serves 503's for 10 second intervals a few times a day

[Stephen Wood]

How are health checks during and throughout this period? Are they all
passing? I would make sure there aren't periods where your backend hosts
aren't becoming unhealthy.


On Wed, Jan 29, 2014 at 11:56 AM, Jennings, Raymond <
raymond.jennings at nytimes.com> wrote:

> There has got to be a way I can drill down as to why Varnish does this.
>  Looking at the varnishncsa output I am seeing 5 to 10 second intervals
> where all requests are returned as 503's  When I look a the backend apache
> servers there are ZERO requests in these time periods.
>
> I see nothing in syslog with any varnishd messages or any other network
> error.  I believe this is internal to Varnish but cannot find anything.
>  Any clues how I can go about digging into this.  This is a production
> system so I cannot modify code but I can insert VCL (C inlined is fine)
>  For now I tried turning on varnishlog (already running varnishncsa.)
>
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-- 
Stephen Wood
www.heystephenwood.com
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