20040329: IDD/LDM - RPC Question

Patrick,

>Date: Mon, 29 Mar 2004 14:37:17 -0600
>From: "Patrick O'Reilly" <address@hidden>
>Organization: University of Northern Illinois
>To: Steve Emmerson <address@hidden>
>Subject: RE: 20040329: IDD/LDM - RPC Question

The above message contained the following:

> Thunder feeds from stokes.  At this point, thunder is a leaf node.

That configuration would have data products going FROM port 338 on
Stokes TO some miscellaneous port on Thunder (the opposite of what you
reported).

> Stokes
> has allow entries for thunder, thunder has no accept entries.

Does Thunder have ALLOW entries for Stokes?

I note that the LDM system on thelma.ucar.edu receives at least 1.8
million RPC messages per day.

> In the
> default ldmd.conf, it states that at this time, accept entries are only
> necessary for WSI data.

Or for getting data via ldmsend(1).

> Thunder's log file is always full of certain
> errors, as things usually run well, I have not paid too much attention to
> them.  There weren't more or less of them when this was occurring.  They are
> like:
> 
> Mar 28 09:24:32 thunder pqact[7550]: child 29832 exited with status 127
> Mar 28 09:29:22 thunder pqact[7550]: child 30394 exited with status 127
> Mar 28 09:29:59 thunder pqact[7550]: child 30397 exited with status 127
> Mar 28 09:32:16 thunder pqact[7550]: pbuf_flush 8: time elapsed   2.625856
> Mar 28 09:32:37 thunder pqact[7550]: pbuf_flush (5) write: Broken pipe
> Mar 28 09:32:37 thunder pqact[7550]: pipe_dbufput:
> decoders/dcrdf-v4-ddata/gempak/logs/dcrdf.log-eGEMTBL=/home/gempak/GEMPAK5.6
> /gempak/tablesdata/gempak/rdf/YYYYMMDDHH.rdf write error
> Mar 28 09:32:37 thunder pqact[7550]: pipe_prodput: trying again
> Mar 28 09:32:37 thunder pqact[7550]: pbuf_flush (5) write: Broken pipe
> Mar 28 09:32:37 thunder pqact[7550]: pipe_dbufput:
> decoders/dcrdf-v4-ddata/gempak/logs/dcrdf.log-eGEMTBL=/home/gempak/GEMPAK5.6
> /gempak/tablesdata/gempak/rdf/YYYYMMDDHH.rdf write error
> Mar 28 09:35:08 thunder pqact[7550]: pbuf_flush 8: time elapsed   2.320114
> Mar 28 09:35:10 thunder pqact[7550]: child 30426 exited with status 127

The above entries pertain to the pqact(1) program writing to a GEMPAK
decoder rather than to any of the three types of LDM-specific processes
(LDM server, upstream LDM, downstream LDM).

> You can view both sets if you like:
> 
> http://thunder.storm.uni.edu
> 
> http://stokes.metr.ou.edu
> 
> I would be interested in eliminating the problem causing the above errors,
> as a side note.

I've CC'ed Steve Chiswell.  He might know something about the above
GEMPAK-decoder failures.

Regards,
Steve Emmerson