c - MPI - Segmentation fault EXIT CODE: 139 -

i have simple mpi code runs before terminating shows following error.

=== =   bad termination of 1 of application processes =   exit code: 139 =   cleaning remaining processes =   can ignore below cleanup messages =================================================================================== application terminated exit string: segmentation fault (signal 11) typically refers problem application. 

below source code.

/* author ::: khayam anjam */  #include <stdio.h> #include <stdlib.h> #include <mpi.h>  int main (int argc, char *argv[]) {     int rank, size, ball_value, ball_present;      mpi_init (&argc, &argv);     mpi_comm_rank (mpi_comm_world, &rank);     mpi_comm_size (mpi_comm_world, &size);      srandom(rank);         int delta = rand() % 13;     int random = rand() % 5;         if (random == 0) delta = -1*delta;     if (rank == 0) {         ball_present = 1;         ball_value = 0;     }     else ball_present = 0;     while (1) {         if(ball_present == 0)              mpi_recv(&ball_value, 30, mpi_int, mpi_any_source, 10, mpi_comm_world, mpi_status_ignore);         ball_present = 1;         printf("task %d has ball value %d\n", rank, ball_value);         if (ball_value == 1000) break;         if (abs(ball_value) > 100) {             int send_1000 = 1000;             int i;             (i = 0; < size; i++)                 if (i != rank) mpi_send(&send_1000, 30, mpi_int, i, 10, mpi_comm_world); //broadcast others             break;           }         ball_value += delta;         int next_to_send = rand() % size;         if (next_to_send != rank) {             printf("sending ball %d\n", next_to_send);             mpi_send(&ball_value, 30, mpi_int, next_to_send, 10, mpi_comm_world);             ball_present = 0;             }     }     mpi_finalize();     return 0; } 

i'm not sure rest of code (seems ok didn't closely), sure you've got mpi_recv() / mpi_send() pairs wrong. problem send , receive arrays of 30 integers, while allocated memory 1 of each. try replacing 30 parameter 1 in 3 mpi_send() or mpi_recv() calls, , code might work.