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20050804: ldm_clnt.c:256: Couldn't connect to LDM 6 on atm.geo.nsf.gov



>From: David Yeung <address@hidden>
>Organization: Hong Kong University of Science and Technology
>Keywords: 200508040403.j7443Pjo013955 IDD atm.geo.nsf.gov

Hi David,

>I've found these errors in our LDM server since Aug 03 15:41:05 (UTC):
>
>Aug 04 03:53:42 rcz006 atm[29018]: ERROR: requester6.c:459; 
>ldm_clnt.c:256: Couldn't connect to LDM 6 on atm.geo.nsf.gov
>Aug 04 03:54:12 rcz006 atm[29018]: Desired product class: 
>20050804025312.402 TS_ENDT {{IDS|DDPLUS,  ".*"}}
>Aug 04 03:54:25 rcz006 atm[29018]: ERROR: requester6.c:459; 
>ldm_clnt.c:256: Couldn't connect to LDM 6 on atm.geo.nsf.gov
>Aug 04 03:54:55 rcz006 atm[29018]: Desired product class: 
>20050804025312.402 TS_ENDT {{IDS|DDPLUS,  ".*"}}
>
>Our LDM server is rcz006.ust.hk and has been fed from atm.geo.nsf.gov
>for long time. Is there any problem in the atm.geo.nsf.gov site.

There is no problem with atm.geo.nsf.gov currently.  Some time ago
non-Internet2 connections to the machine were disabled by the system
admins at NSF since the volume of data the machine was sending to
downstreams would consume NSF's commodity network connection if their
Internet2 link failed.  I don't believe that I have seen any machine
from your site feeding from atm since that change.  Are you sure that
you have been getting data from atm recently?

If your feed requests to atm do, in fact, go over commodity Internet
and not Internet2, you will need to feed from some other relay in the
IDD.  To test if this is the case, please run a traceroute from your
LDM machine to atm:

<while logged in as 'ldm' on your LDM machine>
traceroute atm.geo.nsf.gov

and send us the results.

In the meantime, and until we can get another top level relay
established on the East coast, you can feed from the top level relay
node we operate at UCAR, idd.unidata.ucar.edu.

>David Yeung
>Hong Kong University of Science and Technology

Cheers,

Tom Yoksas
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