Stuck in FIN_WAIT_2

[Nikolay Denev]

On Mar 15, 2012, at 12:57 PM, grarpamp wrote:

> Hi. I've got 900-1000 connections stuck in FIN_WAIT_2.
> The processes behind them on both sides have long
> since exited. Anything I can do to clear them out
> short of reboot? The box is 4.11, so no tcpdrop to try.
> I suspect this may be starting to limit mbuf clusters.
> Not sure. The box is idle. If in this state the kernel sends
> packets, would ipfw reset rule clear it? No big deal.
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Hi,

I'm not sure if 4.11 has the following sysctls, but you can try them if they exist :

net.inet.tcp.finwait2_timeout <-- lower this
net.inet.tcp.fast_finwait2_recycle <-- set this to 1

Regards,
Nikolay