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SO_REUSEPORT

January 31, 2019 07:06PM
Hi All,

Hit a rather strange issue today on a production service where during a
configuration reload (evident by the worker processes in the process of
being shutdown). During this reload a percentage of connections were not
getting accepted (and hence not processed). I was able to confirm that none
of the processes were accepting the connections.

Our configuration includes the reuseport option so my theory was that for
some reason connections were still being routed to the shutting down
worker, which was not accepting new connections.

This has a striking resemblance to the HAProxy issues in previous years
with connections received during live configuration reloads.

Software Versions:
nginx version: nginx/1.15.8
linux kernel: 4.9.2

Does anyone have an idea of where to look for this issue? Or have you see
anything like it before?

I am aware the kernel is a bit on the older side, anyone seen any relevant
issues / patches?

Regards,
Mathew
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Subject Author Views Posted

SO_REUSEPORT

splitice 431 January 31, 2019 07:06PM

Re: SO_REUSEPORT

Valentin V. Bartenev 171 February 01, 2019 09:06AM

Re: SO_REUSEPORT

splitice 194 February 01, 2019 09:08AM

Re: SO_REUSEPORT

Maxim Dounin 221 February 01, 2019 09:14AM

Re: SO_REUSEPORT

splitice 285 February 01, 2019 09:22AM

Re: SO_REUSEPORT

Maxim Dounin 186 February 01, 2019 10:50AM

Re: SO_REUSEPORT

Tomas1345 189 February 05, 2019 07:26AM

Re: SO_REUSEPORT

splitice 163 April 23, 2019 08:40PM

Re: SO_REUSEPORT

splitice 142 May 02, 2019 06:52AM

Re: SO_REUSEPORT

Maxim Dounin 125 May 03, 2019 06:54PM

Re: SO_REUSEPORT

splitice 137 May 03, 2019 07:04PM

Re: SO_REUSEPORT

Maxim Dounin 145 May 03, 2019 08:16PM

Re: SO_REUSEPORT

splitice 189 May 03, 2019 08:18PM



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