[orbit-user] Warning: Almost lost handler

[Ivan Seskar]

Hi Fehmi,

Is this happening during imaging or while running experiment? Typically this is the sign that there is heavy traffic on the control subnet and, since nodeAgent packets are not prioritized (it is on a TODO list), this tends to starve the keep-alive packets (that is why it sometimes happens during imaging). Alternative is to use the data subnet (second Ethernet) for experimental data. 

Ivan.

PS: Also what was the experiment id - maybe we can see something in the logs?

PPS: The warning shouldn't affect the experiment at all (it is there just to "suggest" that there is a lot of Ethernet traffic).

-----Original Message-----
From: orbit-user-bounces at orbit-lab.org [mailto:orbit-user-bounces at orbit-lab.org] On Behalf Of Fehmi Ben Abdesslem
Sent: Wednesday, July 09, 2008 10:04 AM
To: Orbit user discussion mailing list
Subject: [orbit-user] Warning: Almost lost handler

Hi all,

Since last week, I always get this kind of warnings while executing scripts from the grid console:

 WARN warning: n_2_16: n_2_16 senderId: 
n_2_16:ALMOST_LOST_HANDLER,1,110239061.991212
 WARN warning: n_16_11: n_16_11 senderId: 
n_16_11:ALMOST_LOST_HANDLER,1,55.987045
 WARN warning: n_6_16: n_6_16 senderId: 
n_6_16:ALMOST_LOST_HANDLER,1,110239059.639049
 WARN warning: n_18_18: n_18_18 senderId: 
n_18_18:ALMOST_LOST_HANDLER,1,41.983455

Does anyone understand what they mean, whether they affect the experiment results, and how to fix those warnings ?
Thanks for your help
Fehmi

--
Fehmi Ben Abdesslem
PhD Candidate

University of Paris VI - Pierre et Marie Curie LIP6/CNRS - Networks & Performance Analysis http://rp.lip6.fr/site_npa/

Office 716 - 7th floor
104, avenue du président Kennedy
F-75016 Paris
Tel: +331 4427 8867

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