MPI 3.1 5.12 is pretty clear on the matter:
"It is erroneous to call MPI_REQUEST_FREE or MPI_CANCEL for a request
associated with a nonblocking collective operation."
-Nathan
> On Jun 9, 2017, at 5:33 AM, Markus wrote:
>
> Dear MPI Users and Maintainers,
>
> I am using openMPI in version 1.
Dear MPI Users and Maintainers,
I am using openMPI in version 1.10.4 with enabled multithread support and
java bindings. I use MPI in java, having one process per machine and
multiple threads per process.
I was trying to build a broadcast listener thread which calls MPI_iBcast,
followed by MPI_WA
