[Boost-users] boost MPI about finalize problem

Subject: [Boost-users] boost MPI about finalize problem
From: Jack Bryan (dtustudy68_at_[hidden])
Date: 2010-10-25 10:24:03

Hi 
I got a problem of MPI. 
I donot know whether it can be resolved in boost MPI.
My program has 5 processes. 
All of them can run MPI_Finalize() and return 0. 
But, the whole program cannot be completed. 
In the MPI cluster job queue, it is still in running status. 
If I use 1 process to run it, no problem.
Why ? 
My program:
int main (int argc, char **argv) {
        MPI_Init(&argc, &argv);	MPI_Comm_rank(MPI_COMM_WORLD, &myRank);	MPI_Comm_size(MPI_COMM_WORLD, &mySize);	MPI_Comm world;	world = MPI_COMM_WORLD;
        if (myRank == 0)        {		do some things. 	}
        if (myRank != 0)      	{		do some things. 	}
        cout << " I am rank " << rank << " I am before MPI_Finalize()" << endl;
        MPI_Finalize();
        cout << " I am rank " << rank << " I am after MPI_Finalize()" << endl;         return 0;	}
I can get the output " I am rank 0 (1, 2, ....) I am before MPI_Finalize() ". 
and 
" I am rank 0 I am after MPI_Finalize() "
But, other processes do not printed out "I am rank ... I am after MPI_Finalize()" .
It is weird. The process has reached the point just before MPI_Finalize(), why they are hanged there ? 
Are there other better ways to check this ? 
Any help is appreciated. 

And, some output files get wrong codes, which can not be readible. In 1-process case, the program can print correct results to these output files . 
Any help is appreciated. 
thanks
Jack
Oct. 24 2010