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[LDM #SQY-147149]: LDM Problem at Seoul National University

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  • Subject: [LDM #SQY-147149]: LDM Problem at Seoul National University
  • Date: Thu, 24 Dec 2009 08:46:40 -0700
EuiHyun,

> I omitted to attach log message of my LDM machine
> sorry.....
> 
> I guess it is limitation of COSMIC.
> Is it right?
> Now, I am reading manual page of LDM processor.
> 
> This is part of my log file.
> 
> Dec  1 22:04:28 ssmgwdss cosmic-io.cosmic.ucar.edu[11594] ERROR:
> Disconnecting due to LDM failure; nullproc_6 failure to
> cosmic-io.cosmic.ucar.edu; RPC: Unable to receive; errno = Connection reset
> by peer
> Dec  1 22:04:58 ssmgwdss cosmic-io.cosmic.ucar.edu[11594] NOTE: LDM-6
> desired product-class: 20091201120458.328 TS_ENDT {{EXP,  ".*"}}
> Dec  1 22:04:58 ssmgwdss cosmic-io.cosmic.ucar.edu[11594] ERROR:
> Disconnecting due to LDM failure; nullproc_6 failure to
> cosmic-io.cosmic.ucar.edu; RPC: Unable to receive; errno = Connection reset
> by peer
> Dec  1 22:05:28 ssmgwdss cosmic-io.cosmic.ucar.edu[11594] NOTE: LDM-6
> desired product-class: 20091201120528.626 TS_ENDT {{EXP,  ".*"}}
> Dec  1 22:05:28 ssmgwdss cosmic-io.cosmic.ucar.edu[11594] ERROR:
> Disconnecting due to LDM failure; nullproc_6 failure to
> cosmic-io.cosmic.ucar.edu; RPC: Unable to receive; errno = Connection reset
> by peer

The error messages mean that the LDM on host "ssmgwdss" was able to connect to 
the LDM on host "cosmic-io.cosmic.ucar.edu" at the TCP level, but not at the 
LDM level.  I suspect that the LDM configuration-file on "cosmic-io" doesn't 
have an ACCEPT entry that matches the request from "ssmgwdss".  You can verify 
this by executing the following command on "ssmgwdss":

    notifyme -vl- -h cosmic-io.cosmic.ucar.edu -f EXP -o 3600

You should see the metadata from the last hours worth of products.  If you 
don't, then you're not allowed to receive that data.

It could be that the ACCEPT entry that should match the request from "ssmgwdss" 
is based on the fully-qualified domain-name of the host and that the 
reverse-DNS lookup (performed by the LDM on "cosmic-io" to convert the IP of 
address of "ssmgwdss" to the fully-qualified domain-name) is failing.  This can 
be verified by executing the nslookup(1) or dig(1) utility on "cosmic-io".  If 
that's the case, then another ACCEPT entry should be created that uses a 
pattern for the IP address of "ssmgwdss" rather than a pattern for the 
fully-qualified domain-name.

> LDM process if difficult for me.
> I aniticipate hopeful message from U.
> 
> Thank you very much.
> And Merry christmas!

You too!

> EuiHyun

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: SQY-147149
Department: Support LDM
Priority: Normal
Status: Closed