Not sure what the solution is, but ompi does not bind to privilege ports. In fact , ompi_info --param btl tcp | grep port_min should show that the minimum port where TCP BTL will try to bind (by default ) is 1024.
-- Sent from my iPhone On May 18, 2012, at 1:02 AM, devendra rai <rai.deven...@yahoo.co.uk> wrote: > Hello Community/Ralph > > I was told by the sysadmin that the firewall does not prevent communication > between two machines (tik33x, tik34x) for instance. However, it will only > block if OpenMPI is trying to open TCP/UDP ports lower than 1024, which > require privileges. > > Is it possible to know which port numbers does OpenMPI use? Specifically, is > it possible to specify port numbers that OpenMPI must not use (OpenMPI-1.4.x)? > > Here is the reply I got from my sysadmin: > > "There is a firewall, but it does not block internal > traffic within the whole TIK network (I verified it for myself). > Thus, the connection problem must be somewhere else > (a service not running or binding to the wrong interface > for instance). Maybe the service wants to bind to a > tcp or udp port lower than 1024, which can only be > allocated by the system's superuser. First, check on > which ports and on which network card interfaces > the software listens and if it is configured correctly > so that it will listen at all." > > > Is there a way out? > > Thanks a lot > > Devendra > > From: Ralph Castain <r...@open-mpi.org> > To: devendra rai <rai.deven...@yahoo.co.uk>; Open MPI Users > <us...@open-mpi.org> > Sent: Wednesday, 16 May 2012, 15:09 > Subject: Re: [OMPI users] Returned "Unreachable" (-12) instead of "Success" > (0) > > Looks like you have a firewall between hosts tik34x and tik33x - you might > check to ensure all firewalls are disabled. The error is saying it can't open > a TCP socket between the two nodes, so there is no communication path between > those two processes. > > > On May 16, 2012, at 4:22 AM, devendra rai wrote: > >> Hello All, >> >> I am trying to run an OpenMPI application across two physical machines. >> >> I get an error "Returned "Unreachable" (-12) instead of "Success" (0)", and >> looking through the logs (attached), I cannot seem to find out the cause, >> and how to fix it. >> >> I see lot of (communication) components being loaded and then unloaded, and >> I do not see which nodes pick up what kind of comm-interface. >> >> -------------------------------------------------------------------------- >> At least one pair of MPI processes are unable to reach each other for >> MPI communications. This means that no Open MPI device has indicated >> that it can be used to communicate between these processes. This is >> an error; Open MPI requires that all MPI processes be able to reach >> each other. This error can sometimes be the result of forgetting to >> specify the "self" BTL. >> >> Process 1 ([[10782,1],6]) is on host: tik34x >> Process 2 ([[10782,1],0]) is on host: tik33x >> BTLs attempted: self sm tcp >> >> Your MPI job is now going to abort; sorry. >> >> The "mpirun" line is: >> >> mpirun --mca btl self,sm,tcp --mca btl_base_verbose 30 -report-pid >> -display-map -report-bindings -hostfile hostfile -np 7 -v --rankfile >> rankfile.txt -v --timestamp-output --tag-output ./xstartwrapper.sh >> ./run_gdb.sh >> >> where the .sh files are fixes for forwarding X-windows from multiple >> machines to the machines where I am logged in. >> >> Can anyone help? >> >> Thanks a lot. >> >> Best, >> >> Devendra >> >> >> >> From: devendra rai <dev...@yahoo.co.uk> >> Subject: Returned "Unreachable" (-12) instead of "Success" (0) >> Date: May 16, 2012 4:18:28 AM MDT >> To: Open MPI Users <us...@open-mpi.org> >> Reply-To: devendra rai <rai.deven...@yahoo.co.uk> >> >> >> >> Hello All, >> >> I am trying to run an OpenMPI application across two physical machines. >> >> I get an error "Returned "Unreachable" (-12) instead of "Success" (0)", and >> looking through the logs (attached), I cannot seem to find out the cause, >> and how to fix it. >> >> I see lot of (communication) components being loaded and then unloaded, and >> I do not see which nodes pick up what kind of comm-interface. >> >> -------------------------------------------------------------------------- >> At least one pair of MPI processes are unable to reach each other for >> MPI communications. This means that no Open MPI device has indicated >> that it can be used to communicate between these processes. This is >> an error; Open MPI requires that all MPI processes be able to reach >> each other. This error can sometimes be the result of forgetting to >> specify the "self" BTL. >> >> Process 1 ([[10782,1],6]) is on host: tik34x >> Process 2 ([[10782,1],0]) is on host: tik33x >> BTLs attempted: self sm tcp >> >> Your MPI job is now going to abort; sorry. >> >> The "mpirun" line is: >> >> mpirun --mca btl self,sm,tcp --mca btl_base_verbose 30 -report-pid >> -display-map -report-bindings -hostfile hostfile -np 7 -v --rankfile >> rankfile.txt -v --timestamp-output --tag-output ./xstartwrapper.sh >> ./run_gdb.sh >> >> where the .sh files are fixes for forwarding X-windows from multiple >> machines to the machines where I am logged in. >> >> Can anyone help? >> >> Thanks a lot. >> >> Best, >> >> Devendra >> <MPILog.txt> >> >> <MPILog.txt>_______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
