Hello, I am having problems with OMPI-1.3beta with an interactive job where rank 0 reads stdin from a terminal. The problem does not show up when stdin is redirected from a file. The problem also does not exist with OMPI 1.2.[5-9]. Has there been any change in OMPI between 1.2 and 1.3 that I should take care of?
Please find attached a famous sample program that was modified to aid debugging.
The program reads the number of intervals used to calculate pi. 0 means exit.
I first enter 1000, then 0.
Interactive run, without mpirun:
% ./a.out
Process 0 of 1 is alive
Process 0 before read
Enter the number of intervals: (0 quits)
1000
Process 0 read: n = 1000
Process 0 before MPI_BCAST
Process 0 after MPI_BCAST
pi is approximately: 3.1415927369231227 Error is: 0.0000000833333296
Process 0 before read
Enter the number of intervals: (0 quits)
0
Process 0 read: n = 0
Process 0 before MPI_BCAST
Process 0 after MPI_BCAST
Process 0 Normal exit
With mpirun:
% mpirun -np 1 ./a.out
Process 0 of 1 is alive
Process 0 before read
Enter the number of intervals: (0 quits)
1000
--------------------------------------------------------------------------
mpirun has exited due to process rank 0 with PID 10909 on
node oflws105 exiting without calling "finalize". This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
--------------------------------------------------------------------------
Now with stdin redirected from a here-document:
% mpirun -np 1 ./a.out <<EOF
> 1000
> 0
> EOF
Process 0 of 1 is alive
Process 0 before read
Enter the number of intervals: (0 quits)
Process 0 read: n = 1000
Process 0 before MPI_BCAST
Process 0 after MPI_BCAST
pi is approximately: 3.1415927369231227 Error is: 0.0000000833333296
Process 0 before read
Enter the number of intervals: (0 quits)
Process 0 read: n = 0
Process 0 before MPI_BCAST
Process 0 after MPI_BCAST
Similarly for np > 1, with minor variations, but the same error message.
Can anybody reproduce this behavior?
% ompi_info |grep SVN
Open MPI SVN revision: r20119
Open RTE SVN revision: r20119
OPAL SVN revision: r20119
Regards,
Harald
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pi3f90-test.f90
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