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[netCDF #MRB-844393]: make check failed

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  • Subject: [netCDF #MRB-844393]: make check failed
  • Date: Mon, 23 Jun 2014 16:21:52 -0600
Hello We-keng,

Thank you very much for the information! It is very helpful, and sheds some
light on the expected behavior for pnetcdf.  I will pass the information
along!

Thanks once again, have a great day,

-Ward


address@hidden> wrote:

> New Client Reply: make check failed
>
> Hi, Ward
>
> I just saw this post on-line. Since it involves PnetCDF, maybe
> I can provide some info from my past experience.
>
> The "unexpected result" in parallel runs but not sequential runs
> is usually caused by the non-POSIX file system (in most of the
> cases, NFS). This is because the data written earlier is still cached
> on local memory and reading it from a remote node will fail to read
> the expected data. To repeat this failure, you can use -machinefile
> option of mpiexec command to use 2 or more compute nodes.
>
> In PnetCDF, we recommend users to use parallel file systems
> (PVFS, Lustre, GPFS etc.) for running "make ptest" (parallel test),
> because of the above reason. Let me know if you are using NFS and my
> reasoning of the cause makes sense to you.
>
> (hope this email can get through, as I am not a registered user of this
> mailing list.)
>
> Wei-keng
>
> > Hello Juanjo,
> >
> > After a bit of investigation, we've come to the conclusion that the issue
> > is likely with the test itself, not with an error with the pnetcdf
> > functionality.  This test runs fine as a single process, and only began
> > failing recently when we started invoking it via 'mpiexec', with more
> than
> > 2 processes.  I've spent a lot of time trying to track down where an
> error
> > would have been introduced, and I cannot find a place in our archives
> where
> > the test passed with multiple processes.
> >
> > I will continue to investigate this and work on fixing the test so that
> it
> > works properly.  In the meantime, as long as your pnetcdf library passed
> > 'make testing', I think you should be ok and can ignore this error.
> >
> > Thank you very much for bringing this to our attention!
> >
> > Have a good week,
> >
> > -Ward
> >
> >
>
>
>
> Ticket Details
> ===================
> Ticket ID: MRB-844393
> Department: Support netCDF
> Priority: Normal
> Status: Open
> Link:
> https://www.unidata.ucar.edu/esupport/staff/index.php?_m=tickets&_a=viewticket&ticketid=24086
>
>



Ticket Details
===================
Ticket ID: MRB-844393
Department: Support netCDF
Priority: Normal
Status: Open