FIN_WAIT_2 timeout

[Pavel Gulchouck]

Hi.

I have hangs tcp-sessions in the FIN_WAIT_2 state, in which packets
sends to remote for several days. Sockstate tells none aboute its,
restart httpd has no effect.
http://httpd.apache.org/docs/misc/fin_wait_2.html says that FreeBSD
has a timeout for FIN_WAIT_2 state, but I don't see it.
Number of such sessions grows according to uptime.
FreeBSD 5.2.1-RELEASE-p9.
Any suggestions?

root at racoon:~>netstat -na | fgrep 195.248.160.78
tcp4       0      0  193.109.240.55.80      195.248.160.78.59843   FIN_WAIT_2
tcp4       0      0  193.109.240.55.80      195.248.160.78.56084   FIN_WAIT_2
tcp4       0      0  193.109.240.55.80      195.248.160.78.37466   FIN_WAIT_2
tcp4       0      0  193.109.240.55.80      195.248.160.78.31848   FIN_WAIT_2
[...]
root at racoon:~>sockstat | fgrep 195.248.160.78
root at racoon:~>netstat -na | grep -c FIN_WAIT_2
419

tcpdump shows:

20:43:54.922521 hosting.itpark.com.ua.http > 195.248.160.78.48714: . ack
3765418226 win 0
20:43:54.923546 hosting.itpark.com.ua.http > 195.248.160.78.48714: . ack 1 win
65535 (DF)
20:44:09.920818 hosting.itpark.com.ua.http > 195.248.160.78.31848: . ack
3792205062 win 0
20:44:09.921773 hosting.itpark.com.ua.http > 195.248.160.78.31848: . ack 1 win
65535 (DF)

-- 
                                Lucky carrier,
                                                  Pavel.