Experimental Physics and
Industrial Control System

Steven Hartman <[email protected]> · Fri, 21 Oct 2005 14:00:50 -0400 (EDT)

On Fri, 21 Oct 2005, Chris Timossi wrote:

> We are seeing a similar failure to the one described. We have not been
> able to correlate the failure with any network activity and we have not
> tried the nmap test. We did examine the mbufs, memory and task list and
> saw nothing unusual. The only symptom was that CA clients lost
> connections and a reboot of the IOC restored the connections. It's an
> intermitant phenomena that occurs on the time scale of a few per months
> and started relatively recently.

Chris--

The best indicator for the scenario I described is a non-zero value which
does not decrease in the Recv-Q column from inetstatShow() for the beacon
port (typically UDP 1028 +/-2):

-> inetstatShow
Active Internet connections (including servers)
PCB      Proto Recv-Q Send-Q  Local Address      Foreign Address (state)
. . .
727480   UDP     1694      0  0.0.0.0.1028          0.0.0.0.0

Adding a shutdown(sock,0) in rsrv_online_notify_task() is working for me.

-- 
Steve Hartman
[email protected] || 919-660-2650
Duke Free Electron Laser Laboratory

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System