closed connections hanging in time_wait state

[Steven Grimm]

Unless your connection rate is very high, old connections in TIME_WAIT  
state are nothing to worry about.. TIME_WAIT does not mean the  
connections are still open. Here's a page that explains what TIME_WAIT  
means (courtesy of a Google search for "tcp time_wait" which will  
point you to other explanations if this one doesn't suffice):

http://www.port80software.com/200ok/archive/2004/12/07/205.aspx

-Steve


On Nov 28, 2007, at 12:37 PM, deva seetharam wrote:

> hello
> we are using python memcache (ver. 1.4.0)  with memcached version  
> (1.2.2) in a web application with apache2 running on debian 4.0.
>
> we notice that when we call disconnect_all() to close connections,  
> the connections are not actually closed - they are left hanging in  
> TCP_WAIT state.
>
>
> i have included below a few of the lines i got from netstat -nt |  
> grep -i 11211.
>
> is there anything we can do close the connections properly?
>
> thanks
> dave
>
> tcp        0      0 127.0.0.1:45965         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45964         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46001         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46000         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46006         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46004         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46011         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46009         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46008         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46015         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:46014         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45987         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45991         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45990         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45995         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45994         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45993         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45992         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45999         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45998         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45997         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:45996         127.0.0.1:11211          
> TIME_WAIT
> tcp        0      0 127.0.0.1:11211         127.0.0.1:46063          
> ESTABLISHED
>