[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[LDM #XDI-772585]: Problems hanging our server possibly related to LDM?

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [LDM #XDI-772585]: Problems hanging our server possibly related to LDM?
  • Date: Tue, 23 Oct 2007 10:17:00 -0600
Greg,

> Our problems continue with LDM and our server hanging/ Today the
> load reached 6.o and ssh logins weren't working. ldm services had the
> top 3 in the "TOP" command list.

What was the CPU usage of the LDM processes?

> We rebooted the machine. For odd
> reasons, ldm is also not auto restarting when the machine comes up - I
> had to delete the ldmd.pid file and the queue before I could restart.

That makes sense.  If the file "ldmd.pid" exists, then another LDM
is likely running.  An "ldmadmin clean" removes this file.

> The last item in the ldmd.log file before the problem was:
> 
> Oct 22 22:17:17 ingest usgodae3.fnmoc.navy.mil[20200] WARN: Future
> product from "usgodae3.fnmoc.navy.mil".  Fix local or ingest clock.
> 73413 20071022221801.297   FNMOC 000
> US058GMET-GR1mdl.0058_0240_00000F0OF2007102218_0105_000100-000000wnd_ucmp

Either your clock is slow or the clock on usgodae3 is fast, or both.
In any case, they should be fixed.

> Any ideas how ldm could get so busy? The problem occurred at ~1645 this
> afternoon. When this problem occurs it always seem to be at :45. . .

The only thing I can think of is that a bunch of data arrives at that
time.  Is a bunch of data being created on usgodae3 at that time?

> Greg
> 
> ~~N~A~T~I~O~N~A~L~~C~E~N~T~E~R~~F~O~R~~A~T~M~O~S~.~~R~E~S~E~A~R~C~H
> Greg Stossmeister                      e-mail: address@hidden
> NCAR/EOL                               phone: (303)497-8692
> P.O. Box 3000                          web: http://www.eol.ucar.edu
> Boulder, CO 80307-3000
> ~~~~~~~~E~A~R~T~H~~~O~B~S~E~R~V~I~N~G~~~L~A~B~O~R~A~T~O~R~Y~~~~~~~~


Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: XDI-772585
Department: Support LDM
Priority: Normal
Status: On Hold