[Bug 192889] accept4 socket hangs in CLOSED (memcached)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Aug 22 15:45:17 UTC 2014


--- Comment #3 from Hiren Panchasara <hiren at FreeBSD.org> ---
You see a lot of connections in CLOSED/CLOSED_WAIT and they go away when you
close the application memcached. That makes me wonder if this is an application
bug leaking FDs and not close()ing some sessions correctly.

But, if enabling net.inet.tcp.log_debug makes the issue go away, it looks like
a race in TCP code where adding extra logging is making things slow enough
where you do not see the problem anymore. 

My 2 cents.

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