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Re: troubles stopping ldm with ldmadmin on linux (fwd)

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  • Subject: Re: troubles stopping ldm with ldmadmin on linux (fwd)
  • Date: Thu, 18 May 2000 10:09:23 -0600 (MDT)

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================

---------- Forwarded message ----------
Date: Wed, 17 May 2000 21:47:48 -0400
From: Jim Koermer <address@hidden>
To: Doug Hunt <address@hidden>
Subject: Re: troubles stopping ldm with ldmadmin on linux

Doug,

Unless this is something unique to linux, I'm not sure that this
behavior is all that unusual. I've noticed it for quite some time on
FreeBSD and AIX systems running LDM. Usually this occurs during the
ingestion of a large McIDAS area file that may take some time to
download completely. I assume that this could also happen with some of
the larger grib files. You can check this by looking at the file sizes
after doing the "ldmadmin stop". After the file in question completely
downloads, the associated rpc.ldmd process will end. I've noticed that
if a large (~25MB) file just started downloading after the stop, it can
take several minutes for it to complete.

--
James P. Koermer             E-Mail: address@hidden
Professor of Meteorology     Office Phone: (603)535-2574
Natural Science Department   Office Fax: (603)535-2723
Plymouth State College       WWW: http://vortex.plymouth.edu/
Plymouth, NH 03264


Doug Hunt wrote:
> 
> Hi all:  I have recently been having troubles stopping LDM via 'ldmadmin
> stop' on linux.  The ldmadmin script seems to not check correctly if all
> LDM kids are killed off.  The result is that after an 'ldmadmin stop',
> one must wait for a minute or so for all rpc.ldmd children to die.  If
> one tries 'ldmadmin start' during this time, it hangs...
> 
> I have made a small patch to 'ldmadmin' which seems to clean up this
> problem.  Instead of just killing off the rpc.ldmd process group leader,
> it kills off all the kids too.
> 
> Attached is the new ldmadmin script.
> 
> Regards,
> 
>   Doug Hunt
> 
> --
> address@hidden
> Software Engineer III
> UCAR - COSMIC
> Tel. (303) 497-2611
>