We have been using Varnish 4.0.2 and noticing lots of 503s even when back end servers are available and healthy. We don't see any issues with network either. FYI, the following are already set in our VCL Connect_timeout = 120s First_byte_timeout = 120s Between_bytes_timeout = 120s But we still see 503s, Is there anything else that must be set to resolve this issue? Thanks Ram |
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