Is it possible to monitor the fair proxy balancer?

Robbie Allen lists at
Sat Jun 28 04:23:02 MSD 2008

Periodically one or more of my mongrel instances will stop getting
requests from nginx (via upstream fair).  The mongrel process is still
running, but not getting any requests.

How can I verify if nginx has taken it out of service?  Is it possible
to get details on the current status of the fair proxy?

I also see the following error in syslog, but I'm unsure if it is

nginx[17280]: segfault at 00007fffa0869fd0 rip 00002ac509ea61e3 rsp
00007fffa0869ed0 error 6

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