程序完成后终止错误

Question

我在C中编写了一个MPI程序来测试节点之间的发送/接收消息。

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

int main(int* argc, char*** argv){
  MPI_Init(NULL, NULL);

  int rank;
  MPI_Comm_rank(MPI_COMM_WORLD, &rank);

  int size;
  MPI_Comm_size(MPI_COMM_WORLD, &size);

  if(size < 2){
    fprintf(stderr, "Must have >2 processes.\n");
    MPI_Abort(MPI_COMM_WORLD, 1);
  }

  int number;
  if(rank == 0){
    number = -1;
    MPI_Send(&number, 1, MPI_INT, 1, 0, MPI_COMM_WORLD);
  }

  else if(rank == 1){
    MPI_Recv(&number, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
    printf("Received number %d from process 0.\n", number);
  }
  MPI_Finalize();
}

当在两台机器上运行时，每台机器都有一个进程，程序提供正确的输出：

Received number -1 from process 0.

但也会抛出错误：

================================================================================
=   BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
=   PID 4529 RUNNING AT node0
=   EXIT CODE: 2
=   CLEANING UP REMAINING PROCESSES
=   YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================

我在错误终端上找到的大多数资源都是处理段错误而不是退出代码2.我尝试在MPI_Finalize之前添加一个MPI_Barrier，这会增加“断言（！关闭）失败”错误。

两个节点都在Raspbian 2015-05-05上使用MPICH 3.1.4。