Varnish 503 Service unavailable error

[Tollef Fog Heen]

]] Paras Fadte 

| Following is the output of varnishstat -1 . Also ,do I have to restart
| varnish when I change the "connect_timeout" parameter ?

No, no need to restart varnish.

| backend_fail            37154         0.59 Backend connections failures

As you can see here, you have quite a few backend connection failures.
Is your backend overloaded?

-- 
Tollef Fog Heen 
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