Thanks, Neeraj singh. To confirm, you always have this error with the profiler, but intermittent without profiler? When the error shows up, does the error show up at the beginning of the application, middle of the application, or near the end of the application? -- Hui Zhou From: Neeraj singh <[email protected]> Date: Friday, October 9, 2020 at 9:22 AM To: "Zhou, Hui" <[email protected]> Cc: "[email protected]" <[email protected]> Subject: Re: [mpich-discuss] Regarding issue with MPICH 3.2 Yes, but sometimes without profiler also, I am also facing this issue with some applications also. Thanks and regards On Fri, Oct 9, 2020 at 7:27 PM Zhou, Hui <[email protected]<mailto:[email protected]>> wrote: Hi Neeraj singh, To clarify, does this error only happen when you try to use the profiler tool? -- Hui Zhou From: Neeraj singh via discuss <[email protected]<mailto:[email protected]>> Reply-To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Date: Friday, October 9, 2020 at 8:41 AM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Cc: Neeraj singh <[email protected]<mailto:[email protected]>> Subject: [mpich-discuss] Regarding issue with MPICH 3.2 I am using the MAQAO profiler tool to collect data based on sampling. While launching an application for multinode some issues I'm facing. Kindly check the attached problem lines and clarify the same. Thanks & Regards Problem lines: [mpiexec@gpu7] HYDU_sock_write (utils/sock/sock.c:294): write error (Bad file descriptor) [mpiexec@gpu7] HYD_pmcd_pmiserv_send_signal (pm/pmiserv/pmiserv_cb.c:177): unable to write data to proxy [mpiexec@gpu7] ui_cmd_cb (pm/pmiserv/pmiserv_pmci.c:79): unable to send signal downstream [mpiexec@gpu7] HYDT_dmxu_poll_wait_for_event (tools/demux/demux_poll.c:76): callback returned error status [mpiexec@gpu7] HYD_pmci_wait_for_completion (pm/pmiserv/pmiserv_pmci.c:198): error waiting for event [mpiexec@gpu7] main (ui/mpich/mpiexec.c:340): process manager error waiting for completion