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

20030905: Cyclone again....

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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: 20030905: Cyclone again....
  • Date: Fri, 05 Sep 2003 16:12:48 -0600
>From: Michael Keables <address@hidden>
>Organization: DU
>Keywords: 200309052154.h85LsgLd011033 LDM queue

Hi, Mike.

>Having problems with cyclone again (no data processed since 8/6)...I've 
>stopped and restarted the ldm, looked for disk full problems (/var 
>shows 100% usage cleared out some old logs in /var/oldlogs but there 
>are a couple of large system files in oldlogs that I can't get rid of.) 
>Not sure if this is even the problem.
>
>Would you take a look at cyclone and see if you can find out what the 
>problem is?

I jumped on as soon as I saw your email, and found that the LDM queue
had gotten corrupted somehow:

% less logs/ldmd.log
 ...
Sep 04 22:30:48 cyclone.natnet.du.edu striker[24917]: assertion "(q == TQ_NIL) 
|| (TQ_HEAD < q && q < tq->nalloc + TQ_OVERHEAD_ELEMS)" fai
led: file "pq.c", line 737

The only solution for a situation like this is to delete and remake the
queue followed by a new start:

ldmadmin delqueue
ldmadmin mkqueue
ldmadmin clean
ldmadmin start

Immediately after doing the above, the LDM started getting data, and
it is being decoded by the ldm0mcidas and McIDAS-XCD decoders.

The question is how your queue gets corrupted!?

>Thanks, Tom.

No worries.  Talk to you later...

Tom