Hi, I'm using the latest Git trunk build of MPICH with GCC and am unable to run a 'hello, world' program using mpiexec. Any clues what the problem is? I have not seen this problem before, but this is newly refreshed laptop. The firewall is active but I would not have expected Hydra to need to go through the firewall to launch a serial job. If there's something wrong with my setup, it would be nice if Hydra would issue a warning/error instead of handing. Thanks, Jeff I compiled MPICH like this: ../configure CC=gcc CXX=g++ FC=gfortran F77=gfortran --enable-threads --enable-f77 --enable-fc --enable-g --with-pm=hydra --enable-rpath --disable-static --enable-shared --with-device=ch3:nemesis --prefix=/home/jeff/eclipse/MPICH/git/install-gcc jeff@goldstone:~/eclipse/OSPRI/mcs.svn/trunk/tests/devices/mpi-pt> mpicc -show gcc -I/home/jeff/eclipse/MPICH/git/install-gcc/include -L/home/jeff/eclipse/MPICH/git/install-gcc/lib64 -Wl,-rpath -Wl,/home/jeff/eclipse/MPICH/git/install-gcc/lib64 -lmpich -lopa -lmpl -lrt -lpthread jeff@goldstone:~/eclipse/OSPRI/mcs.svn/trunk/tests/devices/mpi-pt> make mpicc -g -O0 -Wall -std=gnu99 -DDEBUG -c hello.c -o hello.o mpicc -g -O0 -Wall -std=gnu99 safemalloc.o hello.o -lm -o hello.x rm hello.o jeff@goldstone:~/eclipse/OSPRI/mcs.svn/trunk/tests/devices/mpi-pt> mpiexec -n 1 ./hello.x ^C[[email protected]] Sending Ctrl-C to processes as requested [[email protected]] Press Ctrl-C again to force abort [[email protected]] HYDU_sock_write (../../../../src/pm/hydra/utils/sock/sock.c:291): write error (Bad file descriptor) [[email protected]] HYD_pmcd_pmiserv_send_signal (../../../../src/pm/hydra/pm/pmiserv/pmiserv_cb.c:170): unable to write data to proxy [[email protected]] ui_cmd_cb (../../../../src/pm/hydra/pm/pmiserv/pmiserv_pmci.c:79): unable to send signal downstream [[email protected]] HYDT_dmxu_poll_wait_for_event (../../../../src/pm/hydra/tools/demux/demux_poll.c:77): callback returned error status [[email protected]] HYD_pmci_wait_for_completion (../../../../src/pm/hydra/pm/pmiserv/pmiserv_pmci.c:197): error waiting for event [[email protected]] main (../../../../src/pm/hydra/ui/mpich/mpiexec.c:331): process manager error waiting for completion jeff@goldstone:~/eclipse/OSPRI/mcs.svn/trunk/tests/devices/mpi-pt> ./hello.x <no errors> jeff@goldstone:~/eclipse/OSPRI/mcs.svn/trunk/tests/devices/mpi-pt> cat hello.c #include <stdio.h> #include <stdlib.h> #include <mpi.h> int main(int argc, char * argv[]) { int provided; MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided); if (provided!=MPI_THREAD_MULTIPLE) MPI_Abort(MPI_COMM_WORLD, 1); int rank, size; MPI_Comm_rank(MPI_COMM_WORLD, &rank); MPI_Comm_size(MPI_COMM_WORLD, &size); MPI_Finalize(); return 0; } -- Jeff Hammond Argonne Leadership Computing Facility University of Chicago Computation Institute [email protected] / (630) 252-5381 http://www.linkedin.com/in/jeffhammond https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond