MPI_Comm_Spawn问题：MPI_Init在简单示例问题上失败

Question

尝试诊断MPI_Comm_Spawn存在的一些问题。当我运行简单的示例程序时：

#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>

int main( int argc, char *argv[] )
{
    int np[2] = { 1, 1 };
    int errcodes[2];
    MPI_Comm parentcomm, intercomm;
    char *cmds[2] = { "spawn_example", "spawn_example" };
    MPI_Info infos[2] = { MPI_INFO_NULL, MPI_INFO_NULL };

    MPI_Init( &argc, &argv );
    MPI_Comm_get_parent( &parentcomm );
    if (parentcomm == MPI_COMM_NULL)
    {
        /* Create 2 more processes - this example must be called spawn_example.exe for this to work. */
        MPI_Comm_spawn_multiple( 2, cmds, MPI_ARGVS_NULL, np, infos, 0, MPI_COMM_WORLD, &intercomm, errcodes );
        printf("I'm the parent.\n");
    }
    else
    {
        printf("I'm the spawned.\n");
    }
    fflush(stdout);
    MPI_Finalize();
    return 0;
}

我得到了输出：

--------------------------------------------------------------------------
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_dpm_dyn_init() failed
  --> Returned "Unreachable" (-12) instead of "Success" (0)
--------------------------------------------------------------------------

我正在使用openmpi 3.1.1。我知道openmpi的早期版本中存在“ spawn”问题，但我认为此版本已解决该问题？有人知道还会发生什么吗？