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Re: 20030823: zoneWriter run amok on motherlode on Saturday morning
- Subject: Re: 20030823: zoneWriter run amok on motherlode on Saturday morning
- Date: Sat, 23 Aug 2003 23:24:16 -0600 (MDT)
I believe it is Robb's process based on questions he asked last week.
Chiz
On Sat, 23 Aug 2003, Unidata Support wrote:
> >From: Unidata User Support <address@hidden>
> >Organization: Unidata Program Center/UCAR
> >Keywords: 200308231227.h7NCR2Ld027291 IDD LDM zoneWriter FNEXRAD
>
> Guys,
>
> Saturday morning we received an email from Jim Koermer that let us
> know that the NEXRAD 1 km National composite base reflectivity images
> were not being relayed by atm:
>
> >From address@hidden Sat Aug 23 06:27:03 2003
>
> >Hello,
>
> >I think that there is a problem with atm.geo.nsf.gov, but only for the
> >1KN0R-NAT data. Other composites have been updating.
>
> >Jim
> >--
> >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
>
> I verified that the 1 km national composites were not available (through
> ADDE) on either atm or motherlode. When I logged onto motherlode, I
> found that the load average was well over 90:
>
> -- snippit from ~ldm/logs/motherlode.uptime --
>
> ...
> 20030823.1518 99.95 96.07 94.69 2 14 16 3933
> 20030823.1519 99.43 96.68 95.00 2 14 16 3988
> 20030823.1520 101.09 97.73 95.49 2 14 16 3996
> 20030823.1521 100.08 97.94 95.70 2 14 16 4023
> 20030823.1522 99.79 98.30 95.98 2 15 17 4045
> 20030823.1523 97.66 98.00 96.03 2 14 16 4016
> 20030823.1524 95.93 97.51 95.98 2 14 16 4020
> 20030823.1525 97.48 97.63 96.12 2 14 16 3979
> 20030823.1526 97.23 97.51 96.17 2 14 16 3990
> 20030823.1527 94.97 96.90 96.05 2 14 16 3377
> 20030823.1528 97.33 97.16 96.20 2 15 17 3442
> 20030823.1529 99.89 97.93 96.53 2 14 16 3498
> 20030823.1530 100.40 98.48 96.82 2 14 16 3560
> 20030823.1531 100.54 98.88 97.07 2 14 16 3617
> 20030823.1532 99.62 98.93 97.21 2 14 16 3680
> ...
>
>
> The offending culprit was a hundred (estimate) invocations of
> ~ldm/decoders/zoneWriter. Not knowing who's decoder this is (Robb?,
> zoneWriter is a Perl script), I decided to send this note to a list of
> possible candidates.
>
> In order to get things working again, I stopped the LDM to kill all of
> the zoneWriter invocations and commented its execution out of the
> pqact.conf file. As I write this, things are slowly returning to
> normal, or, at least, some new composites are being sent out in the
> FNEXRAD feed.
>
> Tom
>