[Dxspider-support] Cluster hangs

Jimmy Turner k5jtj at arrl.net
Sun Mar 6 04:53:24 GMT 2005


I realize that Hotplug is associated with USB devices.  The problem with
my system was that when I rebooted, the system was so tied up with these
Hotplug processes, that it seemed like it was locked up.  I counted 128
different processes in the ps ax command that all said "Hotplug" and not
until I went into bios and disabled the USB devices on the MB, did my
problem with Hotplug subside.  No, it doesn't have anything to do with
Spider, except it was happening on my machine that runs Spider.
SSH, same here, no access unless I know I need it.

73  de  K5JTJ, Jimmy

On Sat, 2005-03-05 at 19:11, Bob Nielsen wrote:
> On Sat, Mar 05, 2005 at 06:25:32PM -0600, Jimmy Turner wrote:
> > I had the same thing happen to our cluster, but I would get a message
> > like this  "cannot fork, try again" every time I tried to issue a
> > command.  I checked the ps ax command and found lots of stuff called
> > "hotplug" running, about 60-100 instances.  I also found some alerts in
> > my /var/log/secure.log files pertaining to invalid SSH logins.  I
> > figured that this was an omen telling me to shut down SSH until I really
> > need it.  Since I have disabled SSH on the box (it's local anyway) I
> > have not had any other lock ups.  
> > I hope this helps,
> > 73  de  K5JTJ
> > sysop K5PLD-2 Spider DXCluster.
> 
> Hotplug is a program which recognizes when USB or Cardplug devices are
> connected or disconnected and loads the proper modules and creates the
> necessary device nodes.  It shouldn't have any direct relationship to dx
> spider.  I doubt that ssh would be involved either (I close port 22 in
> my firewall unless I know I will need to temporarily have ssh access
> from another site).
> 
> 73, Bob N7XY
> 
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