<div dir="ltr">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.<div>
<br></div><div>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.)</div>
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