You should consider it a bug for now - it won’t work in the 2.0 series, and I don’t think it will work in the upcoming 2.1.0 release. Probably will be fixed after that.
> On Mar 13, 2017, at 5:17 AM, Adam Sylvester <op8...@gmail.com> wrote: > > As a follow-up, I tried this with Open MPI 1.10.4 and this worked as expected > (the port formatting looks really different): > > $ mpirun -np 1 ./server > Port name is > 1286733824.0;tcp://10.102.16.135:43074+1286733825.0;tcp://10.102.16.135::300 > Accepted! > > $ mpirun -np 1 ./client > "1286733824.0;tcp://10.102.16.135:43074+1286733825.0;tcp://10.102.16.135::300" > Trying with > '1286733824.0;tcp://10.102.16.135:43074+1286733825.0;tcp://10.102.16.135::300' > Connected! > > I've found some other posts of users asking about similar things regarding > the 2.x release - is this a bug? > > On Sun, Mar 12, 2017 at 9:38 PM, Adam Sylvester <op8...@gmail.com > <mailto:op8...@gmail.com>> wrote: > I'm using Open MPI 2.0.2 on RHEL 7. I'm trying to use MPI_Open_port() / > MPI_Comm_accept() / MPI_Conn_connect(). My use case is that I'll have two > processes running on two machines that don't initially know about each other > (i.e. I can't do the typical mpirun with a list of IPs); eventually I think I > may need to use ompi-server to accomplish what I want but for now I'm trying > to test this out running two processes on the same machine with some toy > programs. > > server.cpp creates the port, prints it, and waits for a client to accept > using it: > > #include <mpi.h> > #include <iostream> > > int main(int argc, char** argv) > { > MPI_Init(NULL, NULL); > > char myport[MPI_MAX_PORT_NAME]; > MPI_Comm intercomm; > > MPI_Open_port(MPI_INFO_NULL, myport); > std::cout << "Port name is " << myport << std::endl; > > MPI_Comm_accept(myport, MPI_INFO_NULL, 0, MPI_COMM_SELF, &intercomm); > > std::cout << "Accepted!" << std::endl; > > MPI_Finalize(); > return 0; > } > > client.cpp takes in this port on the command line and tries to connect to it: > > #include <mpi.h> > #include <iostream> > > int main(int argc, char** argv) > { > MPI_Init(NULL, NULL); > > MPI_Comm intercomm; > > const std::string name(argv[1]); > std::cout << "Trying with '" << name << "'" << std::endl; > MPI_Comm_connect(name.c_str(), MPI_INFO_NULL, 0, MPI_COMM_SELF, > &intercomm); > > std::cout << "Connected!" << std::endl; > > MPI_Finalize(); > return 0; > } > > I run the server first: > $ mpirun ./server > Port name is 2720137217.0:595361386 > > Then a second later I run the client: > $ mpirun ./client 2720137217.0:595361386 > Trying with '2720137217.0:595361386' > > Both programs hang for awhile and then eventually time out. I have a feeling > I'm misunderstanding something and doing something dumb but from all the > examples I've seen online it seems like this should work. > > Thanks for the help. > -Adam > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users
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