Parallel processing with 3ddp Error

Kartik

I get an error when i am running parallel processing with 3ddp solver. "cells..op_read error on parent context: generic socket failure, error stack: MPIDU_Sock_wait(2533): The semaphore timeout period has expired. (errno 121) unable to read the cmd header on the parent context, generic socket failure, error stack: MPIDU_Sock_wait(2533): The semaphore timeout period has expired. (errno 121). connection to my parent broken, aborting. state machine failed."

Any solution that you may suggest regards kartik