NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

Re: pqing stopped inserting when downstream requested feed

Jessica,

I too am ingesting NOAAPORT data using the pqing -P  <port number> directly
from our Unisys NOAAPORT
Receive System.  I have occasional, unexplained problems with the pqing
just stopping, not receiving data via the socket.
Although I haven't related it to another LDM feeding from this system. In
fact, if I am correct the pqing has little
to do with feeding downstream sites, rather the rpc.ldm  does much of that,
I believe.

 I am running 3 different pqing processes, with the NRS system filtering
the  WMO headers to mimic the Unidata
feed types for compatibility.  I am running Linux Mandrake 7.1 on this
system, but the problem also occurred on our
AIX 4.3 RS/6000 when I tested on that platform a few months ago, so I don't
think the problem is platform specific.

 * DDPLUS|IDS feed type
 * HDS feed type
 * NNEXRAD feedtype

Almost always 1 will quit while the others continue.  I have felt like the
problem is more likely with the Unisys NRS software, thats
why I haven't brought it to the attention of the LDM users.  But it sounds
like you may be having a similar problem. What type of
NRS system are you using?

I have had much better success when I run just 1 pqing process and ingest
everything as WMO.  But this
doesn't suit our current environment.

There may be a bug in the way pqing handles socket connections?  I would
curious to know how Unidata is
feeding there top level relay sites from the NRS systems? If they are using
the socket connection?

If I figure anything out from this end I will pass it along.

Mike Dross
Duke Energy



                                                                                
                                             
                    Jessica Thomale                                             
                                             
                    <jthomale@xxxxxxxxxxx.        To:     
<ldm-users@xxxxxxxxxxxxxxxx>, <support@xxxxxxxxxxxxxxxx>           
                    ou.edu>                       cc:                           
                                             
                    Sent by:                      bcc:                          
                                             
                    owner-ldm-users@unidat        Subject:     pqing stopped 
inserting when downstream requested feed        
                    a.ucar.edu                                                  
                                             
                                                                                
                                             
                                                                                
                                             
                    02/13/2001 09:01 PM                                         
                                             
                                                                                
                                             
                                                                                
                                             




Good Evening,

We are requesting a NOAAPort feed using pqing -P <port number> on a ldm
server that serves this data to downstream ldm hosts.

Today, when the downstream ldm server started requesting a feed from the
upstream ldm server, one of the pqing processes (importing the NWSTG
channel) mysteriously died. I attached a copy of the two ldmd log files.

Both machines are running ldm-5.1.3. The upstream server is a FreeBSD
(version 4.2) box.  The downstream server is a Solaris/x86 box (version 8).

There appears to be a problem with the product queue on the upstream ldm
server.

Has anyone experienced any problems similar to this problem?

Thank you in advance for any assistance,

Jessica

--
Jessica M. Thomale
Oklahoma Climatological Survey
E-mail: jthomale@xxxxxx
Mail: 100 E. Boyd, Suite 1210 Norman, OK 73019-1012
Phone: (405) 325-7809
Fax: (405) 325-2550


(See attached file: ldmd.log.downstream)
(See attached file: ldmd.log.upstream)

Attachment: ldmd.log.downstream
Description: Binary data

Attachment: ldmd.log.upstream
Description: Binary data