Hi Sebastian, > my problem sounds similar but to the bug but it is different. My program > also hangs when using collective MPI I/O. > > According to the bug report, only an issue with independent I/O was fixed. You're right, but we think we have a fix for the collective I/O hang now, available in the netCDF-C 4.3.1-rc2 version (a release candidate): https://github.com/Unidata/netcdf-c/releases/tag/v4.3.1-rc2 At your convenience, please let us know if it fixes the problem. --Russ > On 06.08.2013 00:09, Unidata netCDF Support wrote: > > Hi Sebastian, > > > > Could you tell us if this recently fixed bug sounds like what you > > found? > > > > https://bugtracking.unidata.ucar.edu/browse/NCF-250 > > > > If so, the fix will be in netCDF release 4.3.1, a release candidate > > for which will soon be announced. > > > > --Russ > > > >> Hi everybody, > >> > >> I just figured out that using collective MPI/IO in variables with > >> unlimited dimensions can lead to deadlocks or wrong files. > >> > >> I have attached a small example program which can reproduce deadlock > >> (and wrong output files depending on the variable "count"). > >> > >> Did I do anything wrong or is this a known bug? > >> > >> My configuration: > >> hdf5 1.8.11 > >> netcdf 4.3 > >> openmpi (default ubuntu installation) > >> > >> Compile command: > >> mpicxx test.cpp -I/usr/local/include -L/usr/local/lib -lnetcdf -lhdf5_hl > >> -lhdf5 -lz > >> (netcdf and hdf5 are installed in /usr/local) > >> > >> Best regards, > >> Sebastian > >> > >> -- > >> Sebastian Rettenberger, M.Sc. > >> Technische UniversitÃt MÃnchen > >> Department of Informatics > >> Chair of Scientific Computing > >> Boltzmannstrasse 3, 85748 Garching, Germany > >> http://www5.in.tum.de/ > >> > >> > > Russ Rew UCAR Unidata Program > > address@hidden http://www.unidata.ucar.edu > > > > > > > > Ticket Details > > =================== > > Ticket ID: RQB-854711 > > Department: Support netCDF > > Priority: Normal > > Status: Closed > > > > -- > Sebastian Rettenberger, M.Sc. > Technische UniversitÃt MÃnchen > Department of Informatics > Chair of Scientific Computing > Boltzmannstrasse 3, 85748 Garching, Germany > http://www5.in.tum.de/ > > > Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: RQB-854711 Department: Support netCDF Priority: Normal Status: Closed
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