Hi, in our varnish setup(varnish-3.0.3-1.el5) using a loadbalanced really Healthy VIP as the only backend, we seem to be getting intermittent 503's
stdout captured with varnishlog -c -m TxStatus:503 35 ReqStart c 10.33.13.254 24582 1166630723 35 RxRequest c POST 35 RxURL c /index.php?option=com_jce&task=plugin&plugin=imgmanager&file=imgmanager&method=form&cid=20&6bc427c8a7981f4fe1f5ac65c1246b5f=cf6dd3cf1923c950586d0dd595c8e20b 35 RxProtocol c HTTP/1.1 35 RxHeader c User-Agent: BOT/0.1 (BOT for JCE) 35 RxHeader c Content-Type: multipart/form-data; boundary=---------------------------41184676334 35 RxHeader c Content-Length: 5000 35 RxHeader c True-Client-IP: 202.80.119.178 35 RxHeader c X-Akamai-CONFIG-LOG-DETAIL: true 35 RxHeader c TE: chunked;q=1.0 35 RxHeader c Connection: TE 35 RxHeader c Akamai-Origin-Hop: 2 35 RxHeader c Via: 1.1 v1-akamaitech.net(ghost) (AkamaiGHost), 1.1 akamai.net(ghost) (AkamaiGHost) 35 RxHeader c X-Forwarded-For: 202.80.119.178, 114.4.39.206 35 RxHeader c Host: www.somedomain.com <http://www.oregonlive.com> 35 RxHeader c Cache-Control: max-age=120 35 RxHeader c Connection: keep-alive 35 RxHeader c X-Forwarded-For: 23.73.180.223 35 RxHeader c Accept-Encoding: identity 35 VCL_call c recv pass 35 VCL_call c hash 35 Hash c /index.php?option=com_jce&task=plugin&plugin=imgmanager&file=imgmanager&method=form&cid=20&6bc427c8a7981f4fe1f5ac65c1246b5f=cf6dd3cf1923c950586d0dd595c8e20b 35 Hash c www.somedomain.com <http://www.oregonlive.com> 35 VCL_return c hash 35 VCL_call c pass pass 35 Backend c 29 www_prod www_prod 35 FetchError c backend write error: 104 (Connection reset by peer) 35 Backend c 42 www_prod www_prod 35 FetchError c backend write error: 104 (Connection reset by peer) 35 VCL_call c error deliver 35 VCL_call c deliver deliver 35 TxProtocol c HTTP/1.1 35 TxStatus c 503 35 TxResponse c Service Unavailable 35 TxHeader c Server: Varnish 35 TxHeader c Content-Type: text/html; charset=utf-8 35 TxHeader c Retry-After: 5 35 TxHeader c Content-Length: 419 35 TxHeader c Accept-Ranges: bytes 35 TxHeader c Date: Tue, 15 Apr 2014 19:31:22 GMT 35 TxHeader c X-Varnish: 1166630723 35 TxHeader c Age: 0 35 TxHeader c Via: 1.1 varnish 35 TxHeader c Connection: close 35 Length c 419 35 ReqEnd c 1166630723 1397590282.467632055 1397590282.899372101 0.033779144 0.431685925 0.0000541 here is super simple pass thru NO cache config : backend www_prod { .host = "cs-****.*****.*****.net"; .port = "80"; .probe = { .url = "/"; .timeout = 5s; .interval = 1s; .window = 5; .threshold = 2; } } sub vcl_recv { if (req.http.X-ADI-MISS) { # Force a cache miss set req.hash_always_miss = true; } if (req.url == "/varnish-health/" || req.url ~ "^/stack-check*") { error 200 "Varnish is responding"; set req.http.Connection = "close"; } if (req.http.host ~ "^(origin|www)") { set req.http.host = regsub(req.http.host, "^origin\.", "www."); set req.backend = www_prod; return(pass); } ## we tried with and w/o these conditions intermittent 503's persisted # if (req.backend.healthy) { # set req.grace = 30s; # } else { # set req.grace = 24h; # } } sub vcl_fetch { # set beresp.do_esi = true; set beresp.ttl = 1m; # set beresp.grace = 24h; } Any helpful thoughts and or possible leads on this will be much appreciated. kind regards, -LC
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