tomcat port annoyance: TIME_WAIT

[Smoot Carl-Mitchell]

On Mon, 2009-03-02 at 11:22 +0000, Thufir wrote:
> Originally posted to tomcat:
> http://article.gmane.org/gmane.comp.jakarta.tomcat.user/178881
> 
> 
> All too often I find myself waiting for this:
> 
> thufir at arrakis:~$ 
> thufir at arrakis:~$ netstat -tan | grep 127
> tcp        0      0 127.0.0.1:631           0.0.0.0:*               
> LISTEN     
> tcp6       0      0 127.0.0.1:8005          :::*                    
> LISTEN     
> tcp6       0      0 127.0.0.1:8080          127.0.0.1:36471         
> TIME_WAIT  
> tcp6       0      0 127.0.0.1:36466         127.0.0.1:8080          
> TIME_WAIT  
> tcp6       0      0 127.0.0.1:36467         127.0.0.1:8080          
> TIME_WAIT  
> tcp6       0      0 127.0.0.1:36469         127.0.0.1:8080          
> TIME_WAIT  
> tcp6       0      0 127.0.0.1:36470         127.0.0.1:8080          
> TIME_WAIT  
> tcp6       0      0 127.0.0.1:36468         127.0.0.1:8080          
> TIME_WAIT  
> thufir at arrakis:~$ 
> 
> 
> to change to this:
> 
> thufir at arrakis:~$ netstat -tan | grep 127
> tcp        0      0 127.0.0.1:631           0.0.0.0:*               
> LISTEN     
> tcp6       0      0 127.0.0.1:8005          :::*                    
> LISTEN     

TIME_WAIT should not cause a delay in connecting to the listening port.
A TCP connection in that state is waiting an engineered time period to
release the connection, so the connection address does not get reused
and end up receiving packets from the previous connection.  There must
be something else going on with your Tomcat configuration. 
-- 
Smoot Carl-Mitchell
Computer Systems and
Network Consultant
smoot at tic.com
+1 480 922 7313
cell: +1 602 421 9005