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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Ohhhh..the fun continues. I have been troubleshooting offline with Daryl. So, from what I can tell, the level2 files for some radars (for whatever reason) are transmitting two volume scans per file. The radars in question appear random, but it might be related to a recent upgrade in ROC software or something. EDIT: the files that blow things up are SAILS_1!!! The file sizes are double because (surprise!) there are two timesteps due to this SAILS_1. Copy of my pqact here, but I assume this is going to create somewhat of a headache for others as well. https://atlas.niu.edu/vgensini/temp/pqact.split.radar ----------------------------------------------- Vittorio (Victor) A. Gensini, Ph.D., CCM Associate Professor Department of Geographic and Atmospheric Sciences Northern Illinois University DeKalb, IL 60115 https://atlas.niu.edu<http://atlas.niu.edu> https://wcs.niu.edu<http://wcs.niu.edu/> <http://a><http://atlas.niu.edu> ________________________________ From: Herzmann, Daryl E [AGRON] <akrherz@xxxxxxxxxxx> Sent: Tuesday, September 29, 2020 11:38 AM To: Victor Gensini <vgensini@xxxxxxx>; ldm-users@xxxxxxxxxxxxxxxx <ldm-users@xxxxxxxxxxxxxxxx> Subject: Re: level2 via LDM Well Howdy, This sounds like a queue that is not holding an hour's worth of data and thus getting duplicated / triplicated product transmisions. My questions: 1) Is your LDM queue holding an hour's worth of data `pqmon`? Do you know if your upstream sources are holding an hour's worth of data? Is your LDM logging anything exciting about switching upstreams etc ? 2) Do the file write timestamps on the files make sense? Such that the write time coincides with the end of the VCP transmission? 3) Do your file byte sizes match what is found on the files at AWS / my realtime site? https://mesonet-nexrad.agron.iastate.edu/level2/raw/KDVN/ Do you have a recent example (today / yesterday) of a 2x / 3x file? Can you share that file for others to interrogate! daryl -- /** * daryl herzmann * Systems Analyst III -- Iowa Environmental Mesonet * https://mesonet.agron.iastate.edu */ ________________________________________ From: ldm-users <ldm-users-bounces@xxxxxxxxxxxxxxxx> on behalf of Victor Gensini <vgensini@xxxxxxx> Sent: Tuesday, September 29, 2020 11:30 AM To: ldm-users@xxxxxxxxxxxxxxxx Subject: [ldm-users] level2 via LDM Tom/Steve and LDM junkies, Have there been any recent changes to the format of LEVEL2 radar files coming over LDM that I perhaps missed? A couple of weeks ago, I had a couple scripts start to break that are using gpnexr2_gf with: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x7FD1DF3C1697 #1 0x7FD1DF3C1CDE #2 0x7FD1DE8BC3AF #3 0x7FD1DE9F0B54 #4 0x4BCFCB #5 0x4B8E59 #6 0x4B93C7 #7 0x42A510 #8 0x4288FE #9 0x40F5A7 #10 0x40903D #11 0x40554A #12 0x405588 #13 0x7FD1DE8A8504 #14 0x4046D7 #15 0xFFFFFFFFFFFFFFFF Segmentation fault (core dumped) A quick peek of the file size for these stations (relative to others) indicate nearly a doubling (in some cases tripling) of the file size versus other stations that are still working. As an example, compare your file sizes today for KDVN and KILX, both of which are in VCP 35. I'm using the standard hhmmssRadarII perl script to create the volumes off of LDM. Again, no issues for some sites, and then this memory error is popping up for others. I sense a change in file contents or format... Any/all ideas welcome. Victor ----------------------------------------------- Vittorio (Victor) A. Gensini, Ph.D., CCM Associate Professor Department of Geographic and Atmospheric Sciences Northern Illinois University DeKalb, IL 60115 https://atlas.niu.edu<http://atlas.niu.edu> https://wcs.niu.edu<http://wcs.niu.edu/> <http://a><http://atlas.niu.edu>
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