[Dxspider-support] Daily user disconnections

[Michael Carper, Ph.D.]

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> 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>
> *To: *"The DXSpider Support list" <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> 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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>>
>>
>
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