Grepping won't really do it for you. You can use varnishlog to capture just 503 status codes by doing the following:
varnishlog -m TxStatus:503 Leave that running and once you get a full output go ahead and paste it here and we'll take a look at it (remember to scrub any sensitive information). On Thu, Jan 16, 2014 at 5:21 PM, Jason Price <[email protected]> wrote: > I was doing that... Grep -B 1... But the thread index number (left most > number) is different... Or is that different because it's doing back end > processing? > > Jason <-- still figuring out varnishlog > On Jan 16, 2014 7:39 PM, "Stephen Wood" <[email protected]> wrote: > >> You should see this value as "Backend" in your varnishlog output. It >> should be right above the FetchError line you posted. >> >> >> On Thu, Jan 16, 2014 at 3:38 PM, Jason Price <[email protected]> wrote: >> >>> So, I have backends which are occasionally slow. So varnish responds >>> with a 503 error. >>> >>> How can I determine WHICH backend was used, which failed to respond in a >>> timely manner? >>> >>> In varnishlog, I see errors like the following: >>> >>> 180 FetchError c http first read error: -1 11 (Resource temporarily >>> unavailable) >>> >>> Reading the code, the -1 SEEMS to indicate that the backend closed the >>> connection on this error. vcl_error doesn't give me access to beresp >>> variables (like beresp.backend.name or IP, which would answer the >>> question). This indicates that obj.* does NOT include a backend >>> indication...<https://www.varnish-cache.org/docs/3.0/reference/vcl.html#variables> >>> >>> Any way I can figure out which backend is failing me? >>> >>> --Jason >>> >>> _______________________________________________ >>> varnish-misc mailing list >>> [email protected] >>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >>> >> >> >> >> -- >> Stephen Wood >> www.heystephenwood.com >> > -- Stephen Wood www.heystephenwood.com
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