Hi, As noted, I had already tried MPIEXEC_PORT_RANGE with no difference. I don’t know if it’s normal for blaunch to just have its own ports and this is nothing to do with mpich or mpiexec at all, but the follow on issue is if I ssh to one of the other nodes, nothing is listening on the control port. I only see a process listening on one of these other ports outside my specified range. Which I think might be related to my fundamental problem of mpiexec failing to do anything under LSF most of the time at high host counts (see my previous thread on this list). On 9 Mar 2021, at 16:21, Zhou, Hui <[email protected]<mailto:[email protected]>> wrote: Hi Sendu, Could you try `MPIEXEC_PORT_RANGE` in stead? I know it is confusing and the documentation probably need update/correction, but `MPICH_PORT_RANGE` is for `MPICH` rather than `MPIEXEC`. -- Hui Zhou From: Sendu Bala via discuss <[email protected]<mailto:[email protected]>> Date: Tuesday, March 9, 2021 at 7:16 AM To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Cc: Sendu Bala <[email protected]<mailto:[email protected]>> Subject: [mpich-discuss] How to set port range used under LSF? Via a bsub, I’m doing: MPICH_PORT_RANGE="46107:46140” mpiexec mpich/examples/cpi When I ssh to the controlling node, I see it has spawned a set of blaunch processes with `--control-port node-12-3-2:46107` as expected, but: ss -l -p -n | grep blaunch tcp LISTEN 0 128 0.0.0.0:34361 0.0.0.0:* users:(("blaunch",pid=2823,fd=7)) tcp LISTEN 0 128 0.0.0.0:46107 0.0.0.0:* users:(("cpi",pid=2839,fd=5),("blaunch",pid=2837,fd=5),("blaunch",pid=2836,fd=5),("blaunch",pid=2835,fd=5),("blaunch",pid=2834,fd=5),("blaunch",pid=2833,fd=5),("blaunch",pid=2832,fd=5),("blaunch",pid=2831,fd=5),("blaunch",pid=2830,fd=5),("blaunch",pid=2829,fd=5),("blaunch",pid=2828,fd=5),("blaunch",pid=2827,fd=5),("blaunch",pid=2826,fd=5),("blaunch",pid=2825,fd=5),("blaunch",pid=2824,fd=5),("blaunch",pid=2823,fd=5),("hydra_pmi_proxy",pid=2822,fd=5),("mpiexec",pid=2821,fd=5)) tcp LISTEN 0 128 0.0.0.0:43741 0.0.0.0:* users:(("blaunch",pid=2825,fd=12)) tcp LISTEN 0 128 0.0.0.0:41983 0.0.0.0:* users:(("blaunch",pid=2830,fd=22)) tcp LISTEN 0 128 0.0.0.0:41215 0.0.0.0:* users:(("blaunch",pid=2832,fd=26)) tcp LISTEN 0 128 0.0.0.0:34433 0.0.0.0:* users:(("blaunch",pid=2831,fd=24)) tcp LISTEN 0 128 0.0.0.0:33219 0.0.0.0:* users:(("blaunch",pid=2827,fd=16)) tcp LISTEN 0 128 0.0.0.0:34405 0.0.0.0:* users:(("blaunch",pid=2837,fd=36)) tcp LISTEN 0 128 0.0.0.0:43465 0.0.0.0:* users:(("blaunch",pid=2836,fd=34)) tcp LISTEN 0 128 0.0.0.0:39755 0.0.0.0:* users:(("blaunch",pid=2833,fd=28)) tcp LISTEN 0 128 0.0.0.0:38095 0.0.0.0:* users:(("blaunch",pid=2829,fd=20)) tcp LISTEN 0 128 0.0.0.0:44625 0.0.0.0:* users:(("blaunch",pid=2834,fd=30)) tcp LISTEN 0 128 0.0.0.0:35345 0.0.0.0:* users:(("blaunch",pid=2835,fd=32)) tcp LISTEN 0 128 0.0.0.0:43827 0.0.0.0:* users:(("blaunch",pid=2826,fd=14)) tcp LISTEN 0 128 0.0.0.0:40915 0.0.0.0:* users:(("blaunch",pid=2828,fd=18)) tcp LISTEN 0 128 0.0.0.0:42549 0.0.0.0:* users:(("blaunch",pid=2824,fd=9)) Why are these all listening on ports outside my range? I’ve also tried setting MPIEXEC_PORT_RANGE and MPIR_CVAR_CH3_PORT_RANGE and still have the problem. Is there any way to fully control the ports used? Cheers, Sendu. -- The Wellcome Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE. _______________________________________________ discuss mailing list [email protected]<mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss [lists.mpich.org]<https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.mpich.org_mailman_listinfo_discuss&d=DwMF-g&c=D7ByGjS34AllFgecYw0iC6Zq7qlm8uclZFI0SqQnqBo&r=R4ZUzQZ7_TZ1SVV_pAmysrrJ1zatMHFpzMNAdJSpPIo&m=CuEiWIvEL-XMgdluJKtxPAWm-NPb8DmcQkMrblVojU0&s=PWAs4LCPVtlyPby567cPJCzNtS471MUxw-iuL_53ZlY&e=> -- The Wellcome Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE.