[Dxspider-support] Daily user disconnections

[Mike McCarthy, W1NR]

I see this all the time. An email explaining how to use SSID's usually
works but for the few that I get no answer from I lock them out.

Mike, W1NR

On 11/02/2016 08:49 AM, Michael Carper, Ph.D. via Dxspider-support wrote:
> Lee,
> 
> This thread goes back several months, but I found something that I
> thought I'd share with you.
> 
> I was watching the login/logout activity on my cluster.  I reached out
> to one of the users who I can see that will logout... and immediately
> login (and there are about 10% of my connected users who do this).  I
> wanted to find out if it was a software problem with HRD.
> 
> The user I reviewed was constantly logging out... logging in.
> 
> Turns out... after investigating... he had HRD installed on two
> computers (which is fine)... and he was attempting to connect using the
> same call from both computers to my cluster.  He was using the
> "Reconnect on disconnect" option on both.
> 
> So when the second instance of HRD connected... it logged out the
> previous one... and logged in from the new one... and this process kept
> repeating itself in an alternating manner indefinitely.
> 
> My plan is to contact the users on my cluster and provide them a
> document about using SSIDs and see if that helps the remaining users.
> 
> Mike, WA9PIE
> 
> On Sat, Apr 23, 2016 at 9:11 PM, Lee Sawkins <ve7cc at shaw.ca
> <mailto:ve7cc at shaw.ca>> wrote:
> 
>     You might not like to hear this, but HRD is the source of my
>     frequent user disconnects.   My HRD users are coming and going all
>     the time.  I have complained about this before, but nothing has ever
>     been done.  It appears if the node does not reply to HRD immediately
>     the program will disconnect.  ALL other user client programs are
>     stable and do not do this.
> 
>     Lee VE7CC
> 
>     ------------------------------------------------------------------------
>     *From: *"Michael Carper, Ph.D." <mike at wa9pie.net
>     <mailto:mike at wa9pie.net>>
>     *To: *"The DXSpider Support list" <dxspider-support at dxcluster.org
>     <mailto:dxspider-support at dxcluster.org>>
>     *Sent: *Saturday, April 23, 2016 11:39:52 PM
>     *Subject: *Re: [Dxspider-support] Daily user disconnections
> 
> 
>     I don't have that line in my crontab... but I still have frequent
>     user disconnections.  I haven't yet figured it out.
> 
>     Mike, WA9PIE
> 
>     On Sat, Apr 23, 2016 at 4:47 PM, ei6iz.Brendan Minish
>     <ei6iz.brendan at gmail.com <mailto:ei6iz.brendan at gmail.com>> wrote:
> 
>         It's been bugging me for a while that ei7mre seems to kick off
>         users every day, despite the cluster remaining running 
>         Today I did a bit of digging and this seems to coincide exactly
>         with the cronjob that  is run by the system  from
>         cmd/crontab at 3AM 
>         the offending entry appears to be 
> 
>         0 3 * * * Spot::daily()
> 
>         is this because the job called is taking too long and it's in
>         the main thread? or do I have a problem elsewhere I should be
>         investigating? 
>         Do I risk really messing things up if I change the schedule of
>         this job to run at a time when I might be awake, to allow me to
>         do a bit more debugging 
> 
>         ei7mre runs on a Centos7 VM with adequate resources (20G of SSD
>         backed Storage, 1G ram)  and the dxspider process never actually
>         crashes (up-time is 250 days at present) 
>         ei7mre typically has ~ 140 Users at weekends these days and
>         never feels in the least bit sluggish, very light CPU load
>         (0.04) most of the time 
> 
> 
>         -- 
>         73
>         Brendan EI6IZ
> 
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