I tried to do : pthread_cancel(thread2).

This terminates the blocking accept.

However, MPI_Finalize hangs.

Regards,

Hirak

From: Roy, Hirak
Sent: Wednesday, October 08, 2014 9:28 AM
To: discuss@mpich.org
Subject: Re: How to terminate MPI_Comm_accept

Hi Huiwei,

Thanks for your response.

I don’t think the solution you suggested will work.

MPI_Comm_accept is a blocking MPI call and the call does not return until there is a matching MPI_Comm_connect or implementation specified timeout ( the timeout can not be configured and reasonably high).

So when Thread2 is waiting on MPI_Comm_accept, it neither can receive any message nor can check any shared flag value.

That’s why I tried to terminate the accept by connecting from thread1.

Please let me know if you have any other suggestion.

Thanks,

Hirak