-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 01/13/2016 10:49 AM, Jayanth Kalyanasundaram wrote: > Hello, > > We are currently using varnish 4.1.0 as a caching layer on top of a > few of our production servers, and from time to time we see a few > 503 errors in the varnish log with the error "- FetchError > http first read error: EOF". The complete log for this is shared > here: http://pastebin.com/JSqywXDa
"http first read error: EOF" means that there was a socket read error while attempting to fetch the first chunk of the response header from the connection to your backend, usually a first byte timeout or a closed connection. - - Timestamp Bereq: 1452675822.047840 0.015508 0.015508 - - FetchError http first read error: EOF - - BackendClose 232 reload_2016-01-12T07:28:50.cp_12 - - Timestamp Beresp: 1452675876.038544 54.006212 53.990704 This says that about 54 seconds elapsed after Varnish sent the backend request until it gave up waiting for the response. That could very well be a first byte timeout, especially since the waiting time is so close to the round number 54 (although 54 seconds is an unusual value for first_byte_timeout). > The issue doesn't seem to be a connection problem with the backend > because a simple curl call of the same URL from the varnish box > seems to work fine. So we'd like to know what could be the reason > behind the error mentioned above and how we can fix it. Does Varnish get the FetchError every time, or only sometimes? It could have been that your curl tests were "just lucky". HTH, Geoff - -- ** * * UPLEX - Nils Goroll Systemoptimierung Scheffelstraße 32 22301 Hamburg Tel +49 40 2880 5731 Mob +49 176 636 90917 Fax +49 40 42949753 http://uplex.de -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBCAAGBQJWli5KAAoJEOUwvh9pJNUR9MkQAInpekQYVjtixJuTkXBxVM6m J397M1D3b89BiXe8bNPiaTMG/+VpsCK8maXoDAgiZ1NYfRaEYqH9gRGkTQu6x9pT A3tyP4yu/gClfDGQp4UikGlYLvUnXtJL8KQTjRNcb/WHlWnGRCHfrHfh6xRJfkJm 4cSVJRfiq+hJvEF+4TVZdA5IbTK73Q8r9Xvk4d2pAyG3smeCqJQMo2Zq5b1a2yGu H1kvQPMDxh3pgkw7trWtpi0b7XznG0hTZ5kT1GdTJ0xZYWXLTcZ5TJ0UX1ZqAz/a ywmzq3KQpBr3MvSNN17m1HKsw7vbTtAeNMm8bXMf7DfWSxCmbcMAWZKlzlwsSW0B n+7h3SrL5s0JqQeDM8VP9RkALv/HOrDfg60wvY0HCjc/X7EPvqs0T2K8Eq+WZlqx ChgMpfgYaOtfD0cUXg1t383LJOoUCy2JuG9ceoqsOuep7B08QfsQdQEh9S+6zkaJ HIStUOVb7SDAfo0zvq43aICFRgz6wTCuEirdfmFM5Ru5rba/9Oog1NiumGlg7HCU 6d+G0hRYW3wBpgXxgLVdn6gHXnsfj1mkZCEwBUC1L8/5nMB12hfzyWo75a8JqhOT RZKAXm9sSpOulHclneLlzXqM88BnRqKl/UTIbW7rHQPmvq5fbxW36GgUYM42xm9E pr8SR/RSaQMyAtJLYpVI =cnn7 -----END PGP SIGNATURE----- _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
