Dear MPICH developers, I am writing to you to report what I think is a bug in ADIO (which, if I understand it correctly, is a part of ROMIO, which is a part of MPICH). The function int ADIOI_LUSTRE_Docollect(ADIO_File, int, ADIO_Offset *, int) defined in src/mpi/romio/adio/ad_lustre/ad_lustre_aggregate.c (MPICH version 3.1.4 and several earlier versions) contains an unprotected division: /* estimate average req_size */ avg_req_size = (int)(total_req_size / total_access_count); I suggest adding an if statement protecting from division by zero and stopping (if appropriate). I hope that this may save somebody a chunk of time later. Some context: I am debugging a failure of PISM [1] on NASA Pleiades [2], which uses the SGI MPI implementation, which also uses ROMIO. PISM crashed with SIGFPE in ADIOI_LUSTRE_Docollect deep inside HDF5 and NetCDF. I am not asking for help with this [3] here; I will contact NASA's support as soon as I have a way of reproducing the issue outside of PISM. Thank you! * Footnotes [1] http://pism-docs.org/wiki/doku.php [2] http://www.nas.nasa.gov/hecc/resources/pleiades.html [3] Any advice is greatly appreciated, though. -- Constantine _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss