我是八度新人。现在，我在Ubuntu 14.04上运行了一个八度音程的helloworld示例，但它总是失败。失败信息如下：
octave:1> system (" mpirun -x LD_PRELOAD=libmpi.so --hostfile ./hostfile -np 2 octave -q --eval 'pkg load mpi; helloworld ()'");
--------------------------------------------------------------------------
It looks like MPI_INIT failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during MPI_INIT; some of which are due to configuration or environment
problems. This failure appears to be an internal failure; here's some
additional information (which may only be relevant to an Open MPI
developer):
ompi_mpi_init: ompi_rte_init failed
--> Returned "(null)" (-43) instead of "Success" (0)
--------------------------------------------------------------------------
An error occurred in MPI_Init
on a NULL communicator
MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
and potentially your MPI job)
[computationnode:17991] Local abort before MPI_INIT completed completed
successfully, but am not able to aggregate error messages, and not able to
guarantee that all other processes were killed!
An error occurred in MPI_Init
on a NULL communicator
MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
and potentially your MPI job)
[computationnode:17992] Local abort before MPI_INIT completed completed
successfully, but am not able to aggregate error messages, and not able to
guarantee that all other processes were killed!
--------------------------------------------------------------------------
It looks like MPI_INIT failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during MPI_INIT; some of which are due to configuration or environment
problems. This failure appears to be an internal failure; here's some
additional information (which may only be relevant to an Open MPI
developer):
ompi_mpi_init: ompi_rte_init failed
--> Returned "(null)" (-43) instead of "Success" (0)
--------------------------------------------------------------------------
mpirun注意到该作业已中止，但没有关于该过程的信息
导致这种情况。