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Re: hung downstream LDM


>Date: Wed, 19 Oct 2005 16:46:10 -0400
>From: Justin Cooke <address@hidden>
>Organization: NOAA/NWS/FSL
>To: Steve Emmerson <address@hidden>
>Subject: Re: hung downstream LDM

The above message contained the following:

> >     The IP address of b2n1 is; and
> >
> >     The IP address of tgp48 is
> >
> > Please tell me if this is incorrect.
> Yes that is correct,  I know in the earlier message I referred to b2n1 
> as but is the same node.
> > Are there any other messages from PID 20832 in the tgp48 log file
> > between the above two?
> There is nothing else for 20832 between those two entries...

Then I think I know the problem.  There's a bug in version 6.3.0 of the
upstream LDM code that's activated if and when an upstream LDM hasn't
sent a data-product for 30 seconds and a subsequent attempt to flush the
connection via a NULLPROC message times-out.  How this bug presents is
not known.  In your case it appears to cause the upstream LDM to hang.

Is it possible to upgrade the LDM on tgp48?  The latest version is
6.4.2.  An upgrade shouldn't take more than 5 minutes.

Steve Emmerson

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