I'm seeing sporadic 503 errors that I'm wondering if someone could help me with. If I read this right, there appears to be a problem with the backend:
151 VCL_call c recv lookup 151 VCL_call c hash 151 Hash c /2le1ert_th.jpg 151 Hash c s7.tinypic.com 151 VCL_return c hash 151 VCL_call c miss fetch 151 FetchError c no backend connection 151 VCL_call c error deliver 151 VCL_call c deliver deliver 151 TxProtocol c HTTP/1.1 151 TxStatus c 503 151 TxResponse c Service Unavailable 151 TxHeader c Server: Varnish 151 TxHeader c Content-Type: text/html; charset=utf-8 151 TxHeader c Retry-After: 5 151 TxHeader c Content-Length: 419 151 TxHeader c Accept-Ranges: bytes 151 TxHeader c Date: Thu, 27 Oct 2011 04:17:57 GMT 151 TxHeader c X-Varnish: 1163340533 151 TxHeader c Age: 1 151 TxHeader c Via: 1.1 varnish 151 TxHeader c Connection: close 151 TxHeader c X-Cache: MISS I currently have the backend configured to use a single IP, which points to a pair of load balancers that distribute it to numerous webservers. It works great 99.99% of the time, but that other 0.01% I get 503s. Is there any way to get more details on what the failure with the backend is? Was there a failure connecting to it? Bad response? Timeout? I almost think this is a varnish issue (seen on both 3.0.1 and 3.0.2), because I'm seeing the problem on all my varnish boxes, in multiple data centers, pointing to different backends. The only other thing I can thing of is there might be an issue with having the load balancers in between varnish and the backends. I plan on testing removing them from the equation by just referring to all the webservers individually soon, but I haven't gotten to that yet. Any help would be appreciated. Thanks, Bryan _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
