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[IDD #FCW-166050]: intermittent ldm feed

Carter,

> Sorry to take this long to get back to you.

No worries.

> meteor.mmm.ucar.edu (128.117.88.5) is not running any ldm software,
> however I do see it in the ldmadmin config output.  Is that a build issue
> and/or a run-time issue?

I think the host name used by the rtstats(1) utility on rain.mmm is 
mis-configured. See below.

Having the wrong host name will affect statistics reporting. It won't affect 
data distribution, however.

> rain.mmm.ucar.edu (mmm-rain, 128.117.88.124) is
> running the LDM software, and it already has the RT stats exec line in its
> ldmd.conf file.
> 
> Here are the outputs of the files you requested:
> 
> rain.mmm.ucar.edu:/users/ldm>ldmadmin config
> 
> hostname:              meteor.mmm.ucar.edu

The host name should be "rain.mmm.ucar.edu". This is due to the LDM registry 
having the wrong value for the "hostname" element. See below.

> os:                    Linux
> release:               3.10.0-862.2.3.el7.x86_64
> ldmhome:               /users/ldm
> LDM version:           6.13.6
> PATH:
> /users/ldm/ldm-6.13.6/bin:/users/ldm/decoders:/users/ldm/util:/users/ldm/bin:/usr/local/netcdf-3.6.3-gfortran/bin:/usr/local/cmpwrappers:/usr/local/complibs-gcc/bin:/usr/local/gcc-5.2.0/bin:.:/bin:/usr/bin:/sbin:/usr/sbin:/usr/bin/X11:/usr/kerberos/bin:/usr/local/bin:/usr/local/hpss/bin
> LDM conf file:         /users/ldm/etc/ldmd.conf
> pqact(1) conf file:    /users/ldm/etc/pqact.conf
> scour(1) conf file:    /users/ldm/etc/scour.conf
> product queue:         /users/ldm/var/queues/ldm.pq
> queue size:            1G bytes
> queue slots:           default
> reconciliation mode:   do nothing
> pqsurf(1) path:        /users/ldm/var/queues/pqsurf.pq
> pqsurf(1) size:        2M
> IP address:            0.0.0.0
> port:                  388
> PID file:              /users/ldm/ldmd.pid
> Lock file:             /users/ldm/.ldmadmin.lck
> maximum clients:       256
> maximum latency:       3600
> time offset:           3600
> log file:              /users/ldm/var/logs/ldmd.log
> numlogs:               7
> log_rotate:            1
> netstat:               /bin/netstat -A inet -t -n
> top:                   /usr/bin/top -b -n 1
> metrics file:          /users/ldm/var/logs/metrics.txt
> metrics files:         /users/ldm/var/logs/metrics.txt*
> num_metrics:           4
> check time:            1
> delete info files:     0
> ntpdate(1):            /usr/sbin/ntpdate
> ntpdate(1) timeout:    5
> time servers:          ntp.ucsd.edu ntp1.cs.wisc.edu ntppub.tamu.edu
> otc1.psu.edu timeserver.unidata.ucar.edu
> time-offset limit:     10

Other than the host name, I didn't notice anything in the above that was wrong.

> rain.mmm.ucar.edu:/users/ldm>cat ~ldm/etc/ldmd.conf
> #####
> # $Id: ldmd.conf,v 1.7 1995/11/08 15:39:54 mitch Exp $
> # Sample ldmd.conf for ldm
> ####
> 
> #
> # Programs that share a queue with rpc.ldmd
> # are started by it and are in the same process group.
> #
> 
> exec "pqact -v -l /users/ldm/logs/pqact.log -d /users/ldm 
> /users/ldm/etc/pqact.conf"
> exec "pqexpire -l /users/ldm/logs/pqexpire.log"

You should disable the "pqexpire" line above. That utility is obsolete and can 
interfere with the proper execution of the LDM system.

> exec "pqbinstats -l /users/ldm/logs/pqstat.log -d /users/ldm/logs"

Likewise for the "pqbinstats" entry.

Your LDM system must have been first installed quite a while ago.

> exec "rtstats -h rtstats.unidata.ucar.edu"
> 
> #exec "pqsurf"
> 
> #
> # LDM5 servers we ask for data
> #
> # request <feedset> <pattern> <hostname pattern>
> #    Per Unidata note: PRIMARY/ALTERNATE designations deprecated 12-08-2014
> #
> 
> request ANY ".*" idd.unidata.ucar.edu
> 
> # request EXP ".*" ice.ssec.wisc.edu
> 
> #request EXP
> # ".*"
> # aws.ssec.wisc.edu
> 
> request EXP ".*" amrc.ssec.wisc.edu
> 
> #request EXP
> # ".*"
> # polarmet12.mps.ohio-state.edu
> 
> 
> ###############################################################################
> # Begin Access control
> ###############################################################################
> 
> ###############################################################################
> # ALLOW: Who we are willing to feed
> #
> # allow <feedset> <hostname pattern>
> #allow ANY ^motherlode\.ucar\.edu$
> #allow ANY ^atm\.ucar\.edu$
> allow ANY ice.ssec.wisc.edu
> #allow ANY polarmet12.mps.ohio-state.edu
> allow ANY ^((localhost|loopback)|(127\.0\.0\.1\.?$))
> ###############################################################################
> 
> # send anything to your own machine
> #allow ANY
> #
> ^((localhost|loopback)|(127\.0\.0\.1\.?$)|([a-z].*\.unidata\.ucar\.edu\.?$))
> 
> ###############################################################################
> # ACCEPT: Who can feed us
> #
> # accept <feedset> <pattern> <hostname pattern>
> ###############################################################################
> 
> # accept anything from yourself
> #accept ANY
> #    .*
> #    ^((localhost|loopback)|(127\.0\.0\.1\.?$))
> 
> accept ANY .* ^((localhost|loopback)|(127\.117\.88\.145\.?$))
> 
> accept  ANY .* ^idd\.unidata\.ucar\.edu$
> 
> ###############################################################################
> # End Access control
> ###############################################################################
> rain.mmm.ucar.edu:/users/ldm>cat ~ldm/etc/registry.xml
> <?xml version="1.0"?>
> <registry>
> <delete-info-files>0</delete-info-files>
> <hostname>meteor.mmm.ucar.edu</hostname>

The value of the above element, "hostname", should be changed to 
"rain.mmm.ucar.edu".

> <insertion-check-interval>300</insertion-check-interval>
> <reconciliation-mode>do nothing</reconciliation-mode>
> <check-time>
> <enabled>1</enabled>
> <limit>10</limit>
> <warn-if-disabled>1</warn-if-disabled>
> <ntpdate>
> <command>/usr/sbin/ntpdate</command>
> <servers>ntp.ucsd.edu ntp1.cs.wisc.edu ntppub.tamu.edu otc1.psu.edu
> timeserver.unidata.ucar.edu</servers>
> <timeout>5</timeout>
> </ntpdate>
> </check-time>
> <log>
> <count>7</count>
> <file>/users/ldm/var/logs/ldmd.log</file>
> <rotate>1</rotate>
> </log>
> <metrics>
> <count>4</count>
> <file>/users/ldm/var/logs/metrics.txt</file>
> <files>/users/ldm/var/logs/metrics.txt*</files>
> <netstat-command>/bin/netstat -A inet -t -n</netstat-command>
> <top-command>/usr/bin/top -b -n 1</top-command>
> </metrics>
> <pqact>
> <config-path>/users/ldm/etc/pqact.conf</config-path>
> <datadir-path>/users/ldm/var/data</datadir-path>
> </pqact>
> <pqsurf>
> <config-path>/users/ldm/etc/pqsurf.conf</config-path>
> <datadir-path>/users/ldm/var/data</datadir-path>
> </pqsurf>
> <queue>
> <path>/users/ldm/var/queues/ldm.pq</path>
> <size>1G</size>
> <slots>default</slots>
> </queue>
> <scour>
> <config-path>/users/ldm/etc/scour.conf</config-path>
> </scour>
> <server>
> <config-path>/users/ldm/etc/ldmd.conf</config-path>
> <ip-addr>0.0.0.0</ip-addr>
> <max-clients>256</max-clients>
> <max-latency>3600</max-latency>
> <port>388</port>
> <time-offset>3600</time-offset>
> <enable-anti-DOS>TRUE</enable-anti-DOS>
> </server>
> <surf-queue>
> <path>/users/ldm/var/queues/pqsurf.pq</path>
> <size>2M</size>
> </surf-queue>
> </registry>

Disable the two LDM configuration-file entries, fix the host name, and restart 
the LDM.

Are you collecting metrics on the LDM system via a crontab(1) entry? If so, can 
you send us a plot of the age of the oldest product in the queue?

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: FCW-166050
Department: Support IDD
Priority: Normal
Status: Closed
===================
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