Hi all
We are trying to figure out why we have been getting a particular HDF5
error when trying to change an attribute. I run update code for datasets
via cron. At random times over the las year for at least 5 separate
files in different datasets with different update code, we discovered we
suddenly couldn't update the actual range attribute for a variable as
the netCDF API did not see the attribute anymore. There was no obvious
cause . Once the file was "broken" it stayed that way. Trying to update
or fix the attribute gives the errors below.
To fix the file we either restore the file from backup or regenerate it
using nccopy on the broken file.
Someone here has done some extensive testing. They found that Fortran,
NCO, and NCL can't work on the attribute. Also, h5edit can't. But, some
HDF5 applications that view the file do not see an error. And the file
gives no error with ncdump though it doesn't show the actual_range
attribute.
Has anyone seen this error before? Any ideas on the cause come to mind?
We are debating NFS issues or library as the cause but are leaning
towards the former, at least partially.
I have a broken and working file in ncftp ftp.cdc.noaa.gov
cd Public/csmith/netcdf
Thanks for any insight
Cathy Smith
ESRL/PSD
Commands we ran to show error:
ncdump -h precip.V1.0.2016.nc <http://precip.V1.0.2016.nc> |grep act
lat:actual_range = 20.125f, 49.875f ;
lon:actual_range = 230.125f, 304.875f ;
time:actual_range = 1893408., 1900824. ;
When I try to add it back, I get
ncatted -h -O -a actual_range,precip,c,f,"100000.,-100000."
precip.V1.0.2016.nc <http://precip.V1.0.2016.nc>
nco_err_exit(): ERROR Short NCO-generated message (usually name of
function that triggered error): nco_enddef()
nco_err_exit(): ERROR Error code is -107. Translation into English
with nc_strerror(-107) is "NetCDF: Can't open HDF5 attribute"
nco_err_exit(): ERROR NCO will now exit with system call
exit(EXIT_FAILURE)
and
ncatted -h -O -a actual_range,precip,o,f,"10000
0.,-100000." precip.V1.0.2016.nc <http://precip.V1.0.2016.nc>
nco_err_exit(): ERROR Short NCO-generated message (usually name of
function that triggered error): nco_enddef()
nco_err_exit(): ERROR Error code is -107. Translation into English
with
nc_strerror(-107) is "NetCDF: Can't open HDF5 attribute"
nco_err_exit(): ERROR NCO will now exit with system call
exit(EXIT_FAILURE)
--
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