[Lustre-discuss] problem reading HDF files on 1.8.5 filesystem

Peter Kjellström cap at nsc.liu.se
Thu May 5 04:17:18 PDT 2011


On Wednesday, May 04, 2011 10:47:26 PM Christopher Walker wrote:
> Hello,
> 
> We have a user who is trying to post-process HDF files in R.  Her script
> goes through a number (~2500) of files in a directory, opening and
> reading the contents.  This usually goes fine, but occasionally the
> script dies with:
> 
> 
> HDF5-DIAG: Error detected in HDF5 (1.9.4) thread 46944713368080:
>    #000: H5F.c line 1560 in H5Fopen(): unable to open file
>      major: File accessability
>      minor: Unable to open file
...
> fstat(3, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0

Seems just like https://bugzilla.lustre.org/show_bug.cgi?id=24458 which is a 
real pain for us atm. Lustre returns file size == 0 for a stat of a non-zero 
file.

> NFS filesystems and our 1.6.7.2 filesystem have no such problems -- any
> suggestions?

This is what we've done, downgrade all our clients from 1.8.5(patchless) to 
1.6.7.1(patchless).

/Peter
 
> Thanks very much,
> Chris
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