Is it possible to monitor the fair proxy balancer?

[Robbie Allen]

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
related....

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

Robbie
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