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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I am also trying to use ucx with slurm/PMIx and get the same error. Also mpirun with "--mca pml ucx" works fine.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Used versions: <o:p></o:p></p><p class=MsoNormal>Ubuntu 20.04<o:p></o:p></p><p class=MsoNormal>slurm 20.02.4<o:p></o:p></p><p class=MsoNormal>OMPI 4.0.4<o:p></o:p></p><p class=MsoNormal>PMIx 3.1.5<o:p></o:p></p><p class=MsoNormal>UCX 1.9.0-rc1<o:p></o:p></p><p class=MsoNormal>OFED 4.9<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>With ucx 1.8.1 I got a slightly different error:<o:p></o:p></p><p class=MsoNormal>error: host1 [0] pmixp_dconn_ucx.c:245 [pmixp_dconn_ucx_prepare] mpi/pmix: ERROR: Fail to init UCX: Unsupported operation<o:p></o:p></p><p class=MsoNormal>[2020-08-11T20:24:48.117] [2.0] error: host1 [0] pmixp_dconn.c:72 [pmixp_dconn_init] mpi/pmix: ERROR: Cannot get polling fd<o:p></o:p></p><p class=MsoNormal>[2020-08-11T20:24:48.117] [2.0] error: host1 [0] pmixp_server.c:402 [pmixp_stepd_init] mpi/pmix: ERROR: pmixp_dconn_init() failed<o:p></o:p></p><p class=MsoNormal>[2020-08-11T20:24:48.117] [2.0] error: (null) [0] mpi_pmix.c:161 [p_mpi_hook_slurmstepd_prefork] mpi/pmix: ERROR: pmixp_stepd_init() failed<o:p></o:p></p><p class=MsoNormal>[2020-08-11T20:24:48.119] [2.0] error: Failed mpi_hook_slurmstepd_prefork<o:p></o:p></p><p class=MsoNormal>[2020-08-11T20:24:48.121] [2.0] error: job_manager exiting abnormally, rc = -1<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Did you solve the problem?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Greetings,<o:p></o:p></p><p class=MsoNormal>Max<o:p></o:p></p></div></body></html>