backend web node keep-alive option

[Dridi Boukelmoune]

>> I think you're getting a retry from varnishd, independent from VCL's
>> return(retry) which only happens on GET/HEAD requests that are
>> supposed to be side-effect-free and safely retry-able. On top of that
>> you might be hitting a bug where Varnish retries more than once.
>> Seeing some log would help confirm this hypothesis.
>>
>> https://github.com/varnishcache/varnish-cache/pull/2135
>
>
> Ah, okay. Is this still valid for version 5.1/5.2?

Yes, but fixed two days ago so it will be part of the next release.

https://github.com/varnishcache/varnish-cache/commit/fa3884391f85565cb7d564cfa5f22d066948d7bc

> The mentioned script doesn't exist anymore. I will try to spend some time to reconstruct this case.

Happy to see you worked around the problem on your side.

Cheers