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Re: NJ and HDF

  • Subject: Re: NJ and HDF
  • Date: Tue, 13 Mar 2012 16:49:03 -0600
On 3/12/2012 2:04 PM, Schmunk, Robert B. (GISS-611.0)[SIGMA SPACE CORPORATION] wrote: 
First, the HDF5 spec allows for an offset superblock. A Panoply user was
trying to open an HDF file in which the superblock was offset 1,048,576
(512*2048) bytes, and the NJ library was throwing back an exception that
the dataset did not look like valid CDM.
Ive made a mod that will keep reading until the end of file, if you open the file specifically as a hdf5 file, which admittedly is not all that easy to do. Weve never seen a file with this kind of offset before (it will actually fail when opening in netcdf4 library). Do you know who created it? 


Second, in a different case, the NJ library was throwing back just a
NullPointerException, with stack trace

    java.lang.NullPointerException
        at ucar.nc2.iosp.hdf5.H5header.extendDimension(H5header.java:536)
        at ucar.nc2.iosp.hdf5.H5header.findDimensionLists(H5header.java:476)
        at ucar.nc2.iosp.hdf5.H5header.makeNetcdfGroup(H5header.java:378)
        at ucar.nc2.iosp.hdf5.H5header.makeNetcdfGroup(H5header.java:390)
        at ucar.nc2.iosp.hdf5.H5header.makeNetcdfGroup(H5header.java:390)
        at ucar.nc2.iosp.hdf5.H5header.read(H5header.java:182)


This one is probably my bug, but im still trying to figure it out.