It is also wise to create a "tmp" directory under your home directory, and reset TMPDIR to point there. Avoiding use of the system tmpdir is highly advisable under Mac OS, especially Catalina.
On Feb 6, 2020, at 4:09 PM, Gutierrez, Samuel K. via users <users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > wrote: Good afternoon, I fear that files created with shm_open(), a call used in the posix shmem component, are not being cleaned up properly. To test this theory, can you please reboot your computer and try again? Rebooting should remove any temporary files created with shm_open(). Sam On Feb 6, 2020, at 4:34 PM, Jin Tao via users <users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > wrote: Hi, I am running Open MPI on Mac OS Catalina and am running into an issue. - I installed Open MPI and everything seemed to be working fine until a few hours ago. - I make and run with the terminal command: make && mpiexec --mca shmem posix --oversubscribe -np 8 main.out - When I do this, I get the following error: opal_shmem_base_select failed --> Returned value -1 instead of OPAL_SUCCESS - If i remove some of the compiler flags, and run as follows, I get another error: schmem: posix: file name search - max attempts exceeded.cannot continue with posix. - In fact, now the program fails to compile at all, and just hangs when I run the make and run command outlined earlier. The program was running correctly earlier today. Could someone please advise? I am new to MPI and would ideally like to develop a lot of skill in using this library for my work. Thanks!
