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[LDM #JDP-127682]: Shared memory issue

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  • Subject: [LDM #JDP-127682]: Shared memory issue
  • Date: Tue, 10 Mar 2015 13:24:39 -0600
Justin,

Are you executing the relevant pqact(1) process(es) with the "-e" (EDEX) option?

> I am currently experiencing a shared memory fault on ldm when I try to
> ingest nexrad2 data. The issue "only" happens when I ingest the data
> using the scripts provided by Tom from motherlode which store pieces of
> radar data and them combine the pieces into one file.
> 
> I do not experience the issue with "any" other feeds. This is the first
> I have experienced the issue at all.
> 
> I checked and my limits are pretty high for shared memory :
> 
> [root@localhost logs]# ipcs -lm
> 
> ------ Shared Memory Limits --------
> max number of segments = 4096
> max seg size (kbytes) = 67108864
> max total shared memory (kbytes) = 17179869184
> min seg size (bytes) =
> 
> 
> Here is the error I receive, below.
> 
> [ldm@localhost ~]$ tail -f var/logs/ldmd.log
> > Mar 10 02:08:18 localhost ldm.tamu.edu[4945] NOTE: Starting Up(6.11.5): 
> > ldm.tamu.edu:388 20150310050818.350 TS_ENDT {{NEXRAD2,  "(MLB|TBW)"}}
> > Mar 10 02:08:18 localhost ldm.tamu.edu[4945] NOTE: LDM-6 desired 
> > product-class: 20150310050818.351 TS_ENDT {{NEXRAD2,  "(MLB|TBW)"},{NONE, 
> > "SIG= 79fb85d12cfb27770cec0e5d2ede9ed3"}}
> > Mar 10 02:08:18 localhost pqact[4941] NOTE: Starting Up
> > Mar 10 02:08:18 localhost rtstats[4944] NOTE: Starting Up (4939)
> > Mar 10 02:08:18 localhost pqact[4943] NOTE: Starting Up
> > Mar 10 02:08:18 localhost pqact[4941] NOTE: Starting from insertion-time 
> > 2015-03-10 06:07:52.477765 UTC
> > Mar 10 02:08:18 localhost pqact[4943] NOTE: Starting from insertion-time 
> > 2015-03-10 06:07:52.477765 UTC
> > Mar 10 02:08:18 localhost edexBridge[4942] NOTE: Starting Up
> > Mar 10 02:08:18 localhost edexBridge[4942] NOTE: Sent 1 messages (0 at the 
> > end of the queue, 1 normally).
> > Mar 10 02:08:18 localhost ldm.tamu.edu[4945] NOTE: Upstream LDM-6 on 
> > ldm.tamu.edu is willing to be a primary feeder
> > Mar 10 02:12:46 localhost pqact[4943] *ERROR: Notification specified but 
> > shared memory is not available.*
> > Mar 10 02:12:46 localhost pqact[4943] NOTE: Filed in 
> > "/awips2/data_store/level2/KMLB/20150310/.tmp/Level2_KMLB_20150310_061245.ar2v":
> >  8932 20150310061246.485 NEXRAD2 947001 
> > L2-BZIP2/KMLB/20150310061245/947/1/S/V06/0
> 
> I should also mention that I am following this guideline:
> 
> https://www.unidata.ucar.edu/support/help/MailArchives/idd/msg05933.html
> 
> for ingesting the NEXRAD2 datasets.
> 
> This is for my edex server.
> 
> If needed, I can provide ssh access to my server if you would like to
> review the issue further.
> 
> Best Regards,
> Justin Balbierer

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: JDP-127682
Department: Support LDM
Priority: Normal
Status: Closed