I thought I replied to this earlier, but apparently I did not. I managed to replicate this with trunk. I entered ticket HDFFV-9622
Rob, I see that the ticket you mentioned is marked as not an issue anymore in our system, which means that it was fixed at some point. But I believe that the issue here is very similar triggering the "unable to modify constant message". We'll investigate. Thanks, Mohamad -----Original Message----- From: Hdf-forum [mailto:hdf-forum-boun...@lists.hdfgroup.org] On Behalf Of Rob Latham Sent: Monday, December 07, 2015 2:08 PM To: hdf-forum@lists.hdfgroup.org Subject: Re: [Hdf-forum] in parallel program, attempt to create an attribute for an empty dataset results in error; how to avoid On 11/26/2015 03:59 AM, ab wrote: > Here is the error message I get, after compiling and running > 'attr_for_empty_dset_prll.c' > ( see the attachment and also the previous letter ). Can somebody > confirm it? Wow, I have never seen anyone else encounter "unable to modify constant message" before. We never did figure out what was going on with my particular environment, but when I tried to reproduce it with HDF5-1.8.14 and newer, it seemed to fix the problem. On the HDF5 side of things, this was ticket HDFFV-8762 , but perhaps your best move is to build the latest Hdf5. not as simple as using debians hdf5-1.8.13 but you'll pick up a couple years worth of bug fixes. ==rob > >> HDF5-DIAG: Error detected in HDF5 (1.8.13) MPI-process 0: >> #000: ../../../src/H5D.c line 426 in H5Dclose(): can't decrement >> count on dataset ID >> major: Dataset >> minor: Unable to decrement reference count >> #001: ../../../src/H5I.c line 1533 in >> H5I_dec_app_ref_always_close(): can't decrement ID ref count >> major: Object atom >> minor: Unable to decrement reference count >> #002: ../../../src/H5I.c line 1475 in H5I_dec_app_ref(): can't >> decrement ID ref count >> major: Object atom >> minor: Unable to decrement reference count >> #003: ../../../src/H5Dint.c line 1386 in H5D_close(): unable to >> flush cached dataset info >> major: Dataset >> minor: Write failed >> #004: ../../../src/H5Dint.c line 2316 in H5D__flush_real(): unable >> to update layout/pline/efl info >> major: Dataset >> minor: Write failed >> #005: ../../../src/H5Dlayout.c line 479 in H5D__layout_oh_write(): >> unable to update layout message >> major: Dataset >> minor: Write failed >> #006: ../../../src/H5Omessage.c line 335 in H5O_msg_write_oh(): >> unable to write object header message >> major: Object header >> minor: Write failed >> #007: ../../../src/H5Omessage.c line 389 in H5O_msg_write_real(): >> unable to modify constant message >> major: Object header >> minor: Write failed > > > On 11/24/2015 06:46 PM, A.B. wrote: >> Hello. >> >> I've run into the following problem while using HDF5: I can't create >> an attribute for an empty dataset when application is executed in >> parallel. >> >> I have some dataset with total number of elements N. I'm writing it >> to a file as 1d dataset. >> When application is executed in parallel, each process writes it's >> own piece of data. >> After saving the dataset to the file, I want to attach some >> attributes to it. >> And here is the problem emerges: if total number of elements N is >> zero, i.e. dataset is empty, my attemp to create an attribute results >> in an error and program termination. >> It doesn't happen if the dataset is nonempty. >> Besides, serial version of the program works fine it both cases. >> >> I must be doing something wrong, but I can't figure out what exactly. >> What is the correct way to create an attribute for a dataset in parallel? >> >> Attached is the source code for the parallel and the serial versions >> of the program. >> I'm using Debian with libhdf5-1.8.13. > > > > _______________________________________________ > Hdf-forum is for HDF software users discussion. > Hdf-forum@lists.hdfgroup.org > http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.or > g > Twitter: https://twitter.com/hdf5 > -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA _______________________________________________ Hdf-forum is for HDF software users discussion. Hdf-forum@lists.hdfgroup.org http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5 _______________________________________________ Hdf-forum is for HDF software users discussion. Hdf-forum@lists.hdfgroup.org http://lists.hdfgroup.org/mailman/listinfo/hdf-forum_lists.hdfgroup.org Twitter: https://twitter.com/hdf5
