Re: [netcdfgroup] IMPORTANT: patch release for HDF5-1.8.4 needed for netCDF-4

  • To: Mary Haley <haley@xxxxxxxx>
  • Subject: Re: [netcdfgroup] IMPORTANT: patch release for HDF5-1.8.4 needed for netCDF-4
  • From: Russ Rew <russ@xxxxxxxxxxxxxxxx>
  • Date: Mon, 22 Feb 2010 16:25:54 -0700
Mary,

> Thanks for the update Russ.
> 
> If we revert back to NetCDF 4.0.1, what version of HDF5 do you  
> recommend we use?
> 
> --Mary

We tested netCDF-4.0.1 with HDF5-1.8.2, but I think it should also work
with HDF5-1.8.3, though there may be memory leak issues with those
combinations.  To be certain, we'll have to do some additional testing.

--Russ

> 
> On Feb 22, 2010, at 11:08 AM, Russ Rew wrote:
> 
> > Hi,
> >
> > We have just been informed of a bug in HDF5-1.8.4 that causes a  
> > problem
> > in files written using netCDF-4.1.  The symptom is that if a  
> > variable or
> > group is created with more than 8 attributes, the resulting file  
> > becomes
> > non-portable between little-endian and big-endian platforms.
> >
> > The HDF5 developers have a fix and are testing it now.  We are also
> > about to test a prerelease snapshot of the fix.
> >
> > This note is to inform the netCDF community about this problem and the
> > upcoming fix, which we expect to be officially announced sometime next
> > week.
> >
> > In the meantime, we recommend that you not use netCDF-4 linked with
> > HDF5-1.8.4 to write netCDF-4 or netCDF-4 classic model files that have
> > more than 8 attributes for any data object, including more than 8  
> > global
> > attributes.  We will add a test to the netCDF-4 version 4.1.1 release
> > that would have uncovered this bug, test the HDF5 fix to make sure it
> > creates portable netCDF-4 files, and keep you informed of progress on
> > this issue.
> >
> > We're sorry for any inconvenience this may cause.
> >
> > --Russ
> >
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