[GEMPAK #AGA-603655]: Problems with gpmap_gf in Gempak 6.4.0

Hi Greg,

The error "over core_pipe_limit" suggests that the maximum number of user 
processes has been reached.

What is the output of "ulimit -a" run as root?  It might be lower than what you 
need for a lot of processes like this, or we might have a problem with gpmap_gf 
processes not ending correctly.

-Michael



> I'm trying to plot individual NEXRAD radar data using gpmap_gf and I'm having 
> a lot of problems - I'm getting seg faults like the following:
> 
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2164]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff8d981128 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic abrt[2179]: saved core dump of pid 2164 
> (/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf) to 
> /var/spool/abrt/ccpp-201
> 2-04-26-17:07:25-2164.new/coredump (827392 bytes)
> Apr 26 17:07:25 sferic abrtd: Directory 'ccpp-2012-04-26-17:07:25-2164' 
> creation detected
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2239]: segfault at 0 ip 
> 000000392692ff7f sp 00007ffffd173658 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2242]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff8f4df6f8 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2247]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff73574d18 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2261]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff8bda1358 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2245]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff71495a28 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: Pid 2245(gpmap_gf) over core_pipe_limit
> Apr 26 17:07:25 sferic kernel: Skipping core dump
> Apr 26 17:07:25 sferic abrt[2260]: not dumping repeating crash in 
> '/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf'
> Apr 26 17:07:25 sferic abrt[2279]: not dumping repeating crash in 
> '/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf'
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2289]: segfault at 0 ip 
> 000000392692ff7f sp 00007fffca7118a8 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2286]: segfault at 0 ip 
> 000000392692ff7f sp 00007fffef00ac98 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: gpmap_gf[2303]: segfault at 0 ip 
> 000000392692ff7f sp 00007fff92019618 error 4 in 
> libc-2.12.so[3926800000+186000]
> Apr 26 17:07:25 sferic kernel: Pid 2303(gpmap_gf) over core_pipe_limit
> 
> 
> /var/log/messages shows things like:
> 
> daemon.err<27>: Apr 30 07:51:22 sferic abrt[16882]: saved core dump of pid 
> 16881 (/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf) to /var/s
> pool/abrt/ccpp-2012-04-30-07:51:22-16881.new/coredump (827392 bytes)
> daemon.err<27>: Apr 30 07:51:22 sferic abrtd: Directory 
> 'ccpp-2012-04-30-07:51:22-16881' creation detected
> daemon.err<27>: Apr 30 07:51:22 sferic abrtd: Executable 
> '/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf' doesn't belong 
> to any package
> daemon.err<27>: Apr 30 07:51:22 sferic abrtd: Corrupted or bad dump 
> /var/spool/abrt/ccpp-2012-04-30-07:51:22-16881 (res:2), deleting
> daemon.err<27>: Apr 30 07:51:45 sferic abrt[16984]: saved core dump of pid 
> 16983 (/export/ldm/home/gempak/GEMPAK6.4.0/os/linux64/bin/gpmap_gf) to /var/s
> pool/abrt/ccpp-2012-04-30-07:51:44-16983.new/coredump (827392 bytes)
> 
> I'm trying to plot the N0Q reflectivity and N0U velocity for 30 NEXRAD radars 
> every 5 minutes and this is crashing my server . I'm running 3 gpmap_gf 
> processes at any one time but this is still to much for my server which has a 
> load below 1.0 when these scripts aren't running and 64 GB of RAM. What am I 
> doing wrong?
> 
> Greg
> 
> -----------------------------------------------------------
> Greg Stossmeister
> Head - Collaborative Tools and Metadata Group
> NCAR/Earth Observing Laboratory (EOL)
> Telephone: (303)497-8692  Facsimilie:(303)497-2044
> e-mail: address@hidden
> Mailing Address:          Shipping Address:
> NCAR/EOL                    UCAR Foothills Lab 1
> P.O. Box 3000               3450 Mitchell Ln
> Boulder, CO 80307      Boulder, CO 80301
> ------------------------------------------------------------
> 
> 
> 
> 
> 
> 

Ticket Details
===================
Ticket ID: AGA-603655
Department: Support GEMPAK
Priority: Normal
Status: Open