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Re: 20010418: ldm connection problem (fwd)



Unidata Support wrote:
>To: <address@hidden>
>From: Tom McDermott <address@hidden>
>Subject: ldm connection problem (fwd)
>Organization: UCAR/Unidata
>Keywords: 200104181323.f3IDNQL08585

---------- Forwarded message ----------
Date: Wed, 18 Apr 2001 09:20:35 -0400 (EDT)
From: Tom McDermott <address@hidden>
To: Frank Colby <address@hidden>
Subject: ldm connection problem

Frank,

Apparently the problem we experienced last year when you tried to connect
to our ldm server has not gone away.  As you recall, after the initial
connection, I get several RECLASS messages per second.  See below.

I am copying this to unidata support in hopes we may be able to get this
resolved.

But in the meantime, could you send me the line(s) in 'ldmd.conf' where
you REQUEST data from vortex?  Maybe we can figure this out.  Thanks.

Tom
------------------------------------------------------------------------------
Tom McDermott                           Email: address@hidden
System Administrator                    Phone: (716) 395-5718
Earth Sciences Dept.                    Fax: (716) 395-2416
SUNY College at Brockport

Apr 18 13:10:13 vortex graupl[5798]: Connection from graupl.uml.edu
Apr 18 13:10:13 vortex graupl(feed)[5798]: Starting Up: 20010418120725.735
TS_ENDT {{DDPLUS,  "(
^[A-OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDA
Apr 18 13:10:13 vortex graupl(feed)[5798]: topo:  graupl.uml.edu UNIDATA
Apr 18 13:10:13 vortex graupl(feed)[5798]: RECLASS: 20010418120727.104
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.153
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.230
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.284
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.345
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.400
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.451
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.499
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.554
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:14 vortex graupl(feed)[5798]: RECLASS: 20010418120727.612
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120729.862
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120729.930
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120729.981
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120730.031
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120730.078
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:16 vortex graupl(feed)[5798]: RECLASS: 20010418120730.127
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,
Apr 18 13:10:17 vortex graupl(feed)[5798]: RECLASS: 20010418120730.204
TS_ENDT {{DDPLUS,  "(^[A-
OQ-X])|(^[YZ].[^AHIJRU])"},{UNIDATA,

---------- Forwarded message ----------
Date: Wed, 18 Apr 2001 09:40:24 -0400 (EDT)
From: Tom McDermott <address@hidden>
To: Frank Colby <address@hidden>
Subject: Re: ldm connection problem

On Wed, 18 Apr 2001, Frank Colby wrote:

> Yes, I do remember -- here are the lines.  As you can see, the lines for
> your connection are identical to the ones we use for Rutgers, which
> normally work just fine, except for now, when they aren't getting any
> data to send on to us!
>
> REQUEST DDS|PPS "(^[A-OQ-X])|(^[YZ].[^AHIJRU])"
> vortex.weather.brockport.edu
> #REQUEST        DDS|PPS "(^[A-OQ-X])|(^[YZ].[^AHIJRU])" ldm.rutgers.edu
> REQUEST NLDN
> "(^([12][0-9][0-9][0-9]|[0-9][0-9])([0-3][0-9][0-9])([0-2][0-9])
> ([0-5][0-9])([0-5][0-9]))" striker.atmos.albany.edu
> REQUEST UNIDATA "(^[A-OQ-X])|(^[YZ].[^HU])"
> vortex.weather.brockport.edu
> #REQUEST        UNIDATA "(^[A-OQ-X])|(^[YZ].[^HU])"     ldm.rutgers.edu

Please shut down ldm until you make this suggested change.  You're filling
up my logs.

OK, DDS and PPS are subsets of UNIDATA, so it makes no sense to have that
the DDS|PPS line.  Comment out the DDS|PPS line and stop, then start the
ldm.  We'll see if that makes a difference.

Tom
 

Hello Tom and Frank,

What was the outcome of your test?  The LDM groups requests together based on fully qualified domain name.  So, both requests to vortex will be grouped into a single request handled by a single connection.  In theory, removing one line should not have made a difference.  Did it?

What does the log say on graup1?  And, which versions of the LDM are you each running?  Tom, are you running pqexpire?

One possibility that would explain all the RECLASS messages is if the clock on graup1 was wrong, causing it to continually request data from the wrong time.  But, I guess the times work for the feed from Rutgers to graup1, is that correct?

The only other anomaly I see in what you've sent is that the RECLASS entry in Tom's log looks incomplete - no pattern shows up for the UNIDATA feed.   Maybe long lines were simply cut off, or maybe it's not handling the dual entries properly...

Please keep me posted.

Anne

-- 
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Anne Wilson                     UCAR Unidata Program            
address@hidden                  P.O. Box 3000
                                  Boulder, CO  80307
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