Re: [netcdfgroup] bug in nc_open_par?

• To: Jim Edwards <jedwards@xxxxxxxx>, "dmh@xxxxxxxxxxxxxxxx" <dmh@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdfgroup] bug in nc_open_par?
• From: Kent Yang <myang6@xxxxxxxxxxxx>
• Date: Wed, 12 Feb 2014 20:20:16 +0000

Not sure if this is relevant. Previously you may need to specify disable-shared 
in the ./configure to build parallel netCDF-4.

Kent

From: netcdfgroup-bounces@xxxxxxxxxxxxxxxx 
[mailto:netcdfgroup-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Jim Edwards
Sent: Wednesday, February 12, 2014 11:57 AM
To: dmh@xxxxxxxxxxxxxxxx
Cc: netcdfgroup@xxxxxxxxxxxxxxxx
Subject: Re: [netcdfgroup] bug in nc_open_par?



On Wed, Feb 12, 2014 at 10:39 AM, Dennis Heimbigner 
<dmh@xxxxxxxxxxxxxxxx<mailto:dmh@xxxxxxxxxxxxxxxx>> wrote:
Two questions:
1. what ./configure flags are you using?

./configure --prefix=/glade/apps/opt/netcdf-mpi/4.3.0/intel/13.1.2 --enable-dap 
--enable-netcdf4 --enable-shared --enable-mmap --enable-diskless
Looking at the config.log I see:

configure:16420: checking whether parallel I/O features are to be included
configure:16422: result: yes


#define USE_PARALLEL_POSIX 1
#define USE_PARALLEL_MPIO 1
#define USE_PARALLEL 1




2. what version of netcdf are you using?

 Using netcdf 4.3.0 built with hdf5 1.8.11
=Dennis Heimbigner
 Unidata

Jim Edwards wrote:
I have a very simple unit test that is failing when I try to use netcdf4
parallel.   The test creates a file, calls enddef, closes the file, then
trys to reopen it.   Using netcdf 4.3.0 built with hdf5 1.8.11 I am getting
an assert error when I run this test,
   3:testnetcdf4: nc4file.c:2858: NC4_open: Assertion `0' failed.
   0:testnetcdf4: nc4file.c:2858: NC4_open: Assertion `0' failed.
   1:testnetcdf4: nc4file.c:2858: NC4_open: Assertion `0' failed.
   2:testnetcdf4: nc4file.c:2858: NC4_open: Assertion `0' failed.

The same test written in F90 instead of C passes.

#include <netcdf.h>
#include <mpi.h>
#include <netcdf_par.h>

int main( int *argc, char ***argv)
{
  int mype, npe;
  int fh, ierr;
  MPI_Init(argc,argv);
  MPI_Comm_size(MPI_COMM_WORLD, &npe);
  MPI_Comm_rank(MPI_COMM_WORLD, &mype);

  ierr = nc_create_par("try.nc<http://try.nc>",NC_MPIIO, MPI_COMM_WORLD, 
MPI_INFO_NULL,
&fh);
  printf("%d %d\n",__LINE__,ierr);
  ierr = nc_enddef(fh);
  printf("%d %d\n",__LINE__,ierr);
  ierr = nc_close(fh);
  printf("%d %d\n",__LINE__,ierr);

  ierr = nc_open_par("try.nc<http://try.nc>",NC_MPIIO, MPI_COMM_WORLD, 
MPI_INFO_NULL, &fh);
  printf("%d %d\n",__LINE__,ierr);
  ierr = nc_close(fh);
  printf("%d %d\n",__LINE__,ierr);

  MPI_Finalize();
}





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--
Jim Edwards

CESM Software Engineering Group
National Center for Atmospheric Research
Boulder, CO
303-497-1842

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  • [netcdfgroup] bug in nc_open_par?
    • From: Jim Edwards
  • Re: [netcdfgroup] bug in nc_open_par?
    • From: Dennis Heimbigner
  • Re: [netcdfgroup] bug in nc_open_par?
    • From: Jim Edwards