Here's some debug logs from the compute node after launching an interactive shell with the x11 flag. I see it show X11 forwarding established, then it ends with a connection timeout.
[2020-11-16T12:12:34.097] debug: Checking credential with 492 bytes of sig data [2020-11-16T12:12:34.098] _run_prolog: run job script took usec=1284 [2020-11-16T12:12:34.098] _run_prolog: prolog with lock for job 30873 ran for 0 seconds [2020-11-16T12:12:34.111] debug: AcctGatherEnergy NONE plugin loaded [2020-11-16T12:12:34.112] debug: AcctGatherProfile NONE plugin loaded [2020-11-16T12:12:34.113] debug: AcctGatherInterconnect NONE plugin loaded [2020-11-16T12:12:34.114] debug: AcctGatherFilesystem NONE plugin loaded [2020-11-16T12:12:34.115] debug: switch NONE plugin loaded [2020-11-16T12:12:34.116] debug: init: Gres GPU plugin loaded [2020-11-16T12:12:34.116] [30873.extern] debug: Job accounting gather LINUX plugin loaded [2020-11-16T12:12:34.117] [30873.extern] debug: cont_id hasn't been set yet not running poll [2020-11-16T12:12:34.117] [30873.extern] debug: Message thread started pid = 18771 [2020-11-16T12:12:34.119] [30873.extern] debug: task NONE plugin loaded [2020-11-16T12:12:34.120] [30873.extern] Munge credential signature plugin loaded [2020-11-16T12:12:34.121] [30873.extern] debug: job_container none plugin loaded [2020-11-16T12:12:34.121] [30873.extern] debug: spank: opening plugin stack /apps/slurm/cluster/20.02.0/etc/plugstack.conf [2020-11-16T12:12:34.121] [30873.extern] debug: X11Parameters: (null) [2020-11-16T12:12:34.133] [30873.extern] X11 forwarding established on DISPLAY=cluster-cn02.domain:66.0 [2020-11-16T12:12:34.133] [30873.extern] debug: jag_common_poll_data: Task 0 pid 18775 ave_freq = 4023000 mem size/max 6750208/6750208 vmem size/max 147521536/147521536, disk read size/max (7200/7200), disk write size/max (374/374), time 0.000000(0+0) Energy tot/max 0/0 TotPower 0 MaxPower 0 MinPower 0 [2020-11-16T12:12:34.133] [30873.extern] debug: x11 forwarding local display is 66 [2020-11-16T12:12:34.133] [30873.extern] debug: x11 forwarding local xauthority is /tmp/.Xauthority-MkU8aA [2020-11-16T12:12:34.202] launch task 30873.0 request from UID:1368 GID:512 HOST:172.21.150.10 PORT:4795 [2020-11-16T12:12:34.202] debug: Checking credential with 492 bytes of sig data [2020-11-16T12:12:34.202] [30873.extern] debug: Handling REQUEST_X11_DISPLAY [2020-11-16T12:12:34.202] [30873.extern] debug: Leaving _handle_get_x11_display [2020-11-16T12:12:34.202] debug: Leaving stepd_get_x11_display [2020-11-16T12:12:34.202] debug: Waiting for job 30873's prolog to complete [2020-11-16T12:12:34.202] debug: Finished wait for job 30873's prolog to complete [2020-11-16T12:12:34.213] debug: AcctGatherEnergy NONE plugin loaded [2020-11-16T12:12:34.214] debug: AcctGatherProfile NONE plugin loaded [2020-11-16T12:12:34.214] debug: AcctGatherInterconnect NONE plugin loaded [2020-11-16T12:12:34.214] debug: AcctGatherFilesystem NONE plugin loaded [2020-11-16T12:12:34.215] debug: switch NONE plugin loaded [2020-11-16T12:12:34.215] debug: init: Gres GPU plugin loaded [2020-11-16T12:12:34.216] [30873.0] debug: Job accounting gather LINUX plugin loaded [2020-11-16T12:12:34.216] [30873.0] debug: cont_id hasn't been set yet not running poll [2020-11-16T12:12:34.216] [30873.0] debug: Message thread started pid = 18781 [2020-11-16T12:12:34.216] debug: task_p_slurmd_reserve_resources: 30873 0 [2020-11-16T12:12:34.217] [30873.0] debug: task NONE plugin loaded [2020-11-16T12:12:34.217] [30873.0] Munge credential signature plugin loaded [2020-11-16T12:12:34.217] [30873.0] debug: job_container none plugin loaded [2020-11-16T12:12:34.217] [30873.0] debug: mpi type = pmix [2020-11-16T12:12:34.244] [30873.0] debug: spank: opening plugin stack /apps/slurm/cluster/20.02.0/etc/plugstack.conf [2020-11-16T12:12:34.244] [30873.0] debug: mpi type = pmix [2020-11-16T12:12:34.244] [30873.0] debug: (null) [0] mpi_pmix.c:153 [p_mpi_hook_slurmstepd_prefork] mpi/pmix: start [2020-11-16T12:12:34.244] [30873.0] debug: mpi/pmix: setup sockets [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_client_v2.c:69 [_errhandler_reg_callbk] mpi/pmix: Error handler registration callback is called with status=0, ref=0 [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_client.c:697 [pmixp_libpmix_job_set] mpi/pmix: task initialization [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_agent.c:229 [_agent_thread] mpi/pmix: Start agent thread [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_agent.c:330 [pmixp_agent_start] mpi/pmix: agent thread started: tid = 70366934331824 [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_agent.c:335 [pmixp_agent_start] mpi/pmix: timer thread started: tid = 70366933283248 [2020-11-16T12:12:34.273] [30873.0] debug: cluster-cn02 [0] pmixp_agent.c:267 [_pmix_timer_thread] mpi/pmix: Start timer thread [2020-11-16T12:12:34.273] [30873.0] debug: stdin uses a pty object [2020-11-16T12:12:34.274] [30873.0] debug: init pty size 34:159 [2020-11-16T12:12:34.274] [30873.0] in _window_manager [2020-11-16T12:12:34.274] [30873.0] debug level = 2 [2020-11-16T12:12:34.274] [30873.0] debug: IO handler started pid=18781 [2020-11-16T12:12:34.275] [30873.0] starting 1 tasks [2020-11-16T12:12:34.276] [30873.0] task 0 (18801) started 2020-11-16T12:12:34 [2020-11-16T12:12:34.276] [30873.0] debug: task_p_pre_launch_priv: 30873.0 [2020-11-16T12:12:34.288] [30873.0] debug: jag_common_poll_data: Task 0 pid 18801 ave_freq = 4023000 mem size/max 9961472/9961472 vmem size/max 512557056/512557056, disk read size/max (0/0), disk write size/max (0/0), time 0.000000(0+0) Energy tot/max 0/0 TotPower 0 MaxPower 0 MinPower 0 [2020-11-16T12:12:34.288] [30873.0] debug: Sending launch resp rc=0 [2020-11-16T12:12:34.288] [30873.0] debug: mpi type = pmix [2020-11-16T12:12:34.288] [30873.0] debug: cluster-cn02 [0] mpi_pmix.c:180 [p_mpi_hook_slurmstepd_task] mpi/pmix: Patch environment for task 0 [2020-11-16T12:12:34.289] [30873.0] debug: task_p_pre_launch: 30873.0, task 0 [2020-11-16T12:12:39.475] [30873.extern] error: _x11_socket_read: slurm_open_msg_conn: Connection timed out On Mon, Nov 16, 2020 at 11:50 AM Russell Jones <arjone...@gmail.com> wrote: > Hello, > > Thanks for the reply! > > We are using Slurm 20.02.0. > > On Mon, Nov 16, 2020 at 10:59 AM sathish <sathish.sathishku...@gmail.com> > wrote: > >> Hi Russell Jones, >> >> I believe you are using a slurm version older than 19.05. X11 >> forwarding code has been revamped and it works as expected starting from >> the 19.05.0 version. >> >> >> On Mon, Nov 16, 2020 at 10:02 PM Russell Jones <arjone...@gmail.com> >> wrote: >> >>> Hi all, >>> >>> Hoping I can get pointed in the right direction here. >>> >>> I have X11 forwarding enabled in Slurm, however I cannot seem to get it >>> working properly. It works when I test with "ssh -Y" to the compute node >>> from the login node, however when I try through Slurm the Display variable >>> looks very different, and I get an error. Example below: >>> >>> [user@cluster-1 ~]$ ssh -Y cluster-cn02 >>> Last login: Mon Nov 16 10:09:18 2020 from 172.21.150.10 >>> -bash-4.2$ env | grep -i display >>> DISPLAY=172.21.150.102:10.0 >>> -bash-4.2$ xclock >>> Warning: Missing charsets in String to FontSet conversion >>> ** Clock pops up and works ** >>> >>> [user@cluster-1 ~]$ srun -p cluster -w cluster-cn02 --x11 --pty bash -l >>> bash-4.2$ env | grep -i display >>> DISPLAY=localhost:28.0 >>> bash-4.2$ xclock >>> Error: Can't open display: localhost:28.0 >>> >>> >>> Any ideas on where to begin looking? I'm not sure why the display >>> variable is being set to localhost instead of the login node. >>> >>> Thanks! >>> >>> >> >> -- >> Regards..... >> Sathish >> >
