Re: [HTCondor-users] Communication Error: condor_status -constraint

[Rob <spamrefuse@xxxxxxxxx>]

Hi,

I am actually having a same or similar problem.

HTCondor 7.9.1 runs on the Linux central manager and
version 7.4.4 on the Windows XP execute machines.

On the manager I run a cron script every 5 minutes, which creates over time
a database with the HTCondor status of the pool. At the heart of the script is
this line:

condor_status -debug -total -constraint "target.Arch == \"INTEL\""



Once in every few days I get an email from the cron daemon with:


Status: R
Error: communication error



So the script has ran, but there was this communication error output.

It is very difficult to reproduce this error, as it happens so rarely; but it does happen.

As for now, I ignore the cron emails and clean up my mailbox every now and then.

But I do think there is an "hidden" problem here with the communication procedure of
the condor_status command. Maybe it has to do with the ClassAds, the conversion between
New and Old type ClassAds, or a glitch in the code of the New Classads?!?!

Rob.


----- Original Message -----
From: Mostafa Bakhtvar <bakhtvar@xxxxxxxxx>
To: 'HTCondor-Users Mail List' <htcondor-users@xxxxxxxxxxx>
Cc: 
Sent: Friday, February 1, 2013 2:18 AM
Subject: Re: [HTCondor-users] Communication Error: condor_status -constraint

Lukas,

I did and below is what I got:

01/31/13 17:13:35 Locale: English_United States.1252
Error: communication error

I am actually trying to imitate some of the commands of the link you
suggested

Regards
Mosy

-----Original Message-----
From: htcondor-users-bounces@xxxxxxxxxxx
[mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Lukas Slebodnik
Sent: 31 January 2013 16:59
To: HTCondor-Users Mail List
Subject: Re: [HTCondor-users] Communication Error: condor_status -constraint

You could try to append "-debug" argument to condor_status command.
This argument may help you with troubleshooting. 

condor_status -debug -constraint ' OpSys == "LINUX"  '

And you should read condor manual section 4.1 if you want to learn how
ClassAdds works.
http://research.cs.wisc.edu/htcondor/manual/v7.8/4_1HTCondor_s_ClassAd.html

Regards
Lukas

On Thu, Jan 31, 2013 at 10:39:15AM +0000, Mostafa.B wrote:
> I am trying to learn how ClassAdds work,
> 
> when I enter the following in command prompt on one of the condor 
> nodes, I get communication error.
> 
> *condor_status -constraint ' OpSys == "LINUX"  '*
> 
> any ideas what would be the reason? and what the solution is?
> 
> 
> Regards
> 
> Mosy

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