Thread 4 (Thread 0x2b08d4c1b700 (LWP 184611)):
#0  0x00002b08d240ac3d in poll () from /lib64/libc.so.6
#1  0x00002b08d2ac90a5 in poll_dispatch (base=0x12d3660, tv=0x2b08d4c0cbd0) at /tmp/openmpi-4.0.6/opal/mca/event/libevent2022/libevent/poll.c:165
#2  0x00002b08d2ac0639 in opal_libevent2022_event_base_loop (base=0x12d3660, flags=1) at /tmp/openmpi-4.0.6/opal/mca/event/libevent2022/libevent/event.c:1630
#3  0x00002b08d2a692de in progress_engine () from /soft/openmpi/4.0.6-gcc850/lib/libopen-pal.so.40
#4  0x00002b08d2102ea5 in start_thread () from /lib64/libpthread.so.0
#5  0x00002b08d24158dd in clone () from /lib64/libc.so.6
Thread 3 (Thread 0x2b08d4e1c700 (LWP 184614)):
#0  0x00002b08d2415eb3 in epoll_wait () from /lib64/libc.so.6
#1  0x00002b08d2abc59d in epoll_dispatch (base=0x12f57f0, tv=<optimized out>) at /tmp/openmpi-4.0.6/opal/mca/event/libevent2022/libevent/epoll.c:407
#2  0x00002b08d2ac0639 in opal_libevent2022_event_base_loop (base=0x12f57f0, flags=1) at /tmp/openmpi-4.0.6/opal/mca/event/libevent2022/libevent/event.c:1630
#3  0x00002b08d2c0d15e in progress_engine () from /soft/openmpi/4.0.6-gcc850/lib/libopen-pal.so.40
#4  0x00002b08d2102ea5 in start_thread () from /lib64/libpthread.so.0
#5  0x00002b08d24158dd in clone () from /lib64/libc.so.6
Thread 2 (Thread 0x2b08e0819700 (LWP 184617)):
#0  0x00002b08d2415eb3 in epoll_wait () from /lib64/libc.so.6
#1  0x00002b08d34bd163 in ucs_event_set_wait (event_set=0x137d8b0, num_events=num_events@entry=0x2b08e080ac00, timeout_ms=-1, event_set_handler=event_set_handler@entry=0x2b08d34a0d60 <ucs_async_thread_ev_handler>, arg=arg@entry=0x2b08e080ac10) at ../../../src/ucs/sys/event_set.c:198
#2  0x00002b08d34a1624 in ucs_async_thread_func (arg=0x137d860) at ../../../src/ucs/async/thread.c:130
#3  0x00002b08d2102ea5 in start_thread () from /lib64/libpthread.so.0
#4  0x00002b08d24158dd in clone () from /lib64/libc.so.6
Thread 1 (Thread 0x2b08cddc1100 (LWP 184570)):
#0  0x00002b08d2a637ce in opal_progress () from /soft/openmpi/4.0.6-gcc850/lib/libopen-pal.so.40
#1  0x00002b08d2a69f35 in ompi_sync_wait_mt () from /soft/openmpi/4.0.6-gcc850/lib/libopen-pal.so.40
#2  0x00002b08d11f1ba9 in ompi_request_default_wait () from /soft/openmpi/4.0.6-gcc850/lib/libmpi.so.40
#3  0x00002b08d1254a03 in ompi_coll_base_sendrecv_actual () from /soft/openmpi/4.0.6-gcc850/lib/libmpi.so.40
#4  0x00002b08d125a0b9 in ompi_coll_base_alltoallv_intra_pairwise () from /soft/openmpi/4.0.6-gcc850/lib/libmpi.so.40
#5  0x00002b08d1208c6b in PMPI_Alltoallv () from /soft/openmpi/4.0.6-gcc850/lib/libmpi.so.40
#6  0x00002b08ce403f9d in cs_all_to_all_copy_array.localalias.7 () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#7  0x00002b08ce2221b3 in fvm_to_ensight_export_nodal () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#8  0x00002b08ce22e215 in fvm_writer_export_nodal () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#9  0x00002b08ce30f35e in _cs_post_write_mesh () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#10 0x00002b08ce31417c in cs_post_write_meshes () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#11 0x00002b08ce314459 in _update_meshes () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#12 0x00002b08ce31aba9 in cs_post_write_vars () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#13 0x00002b08ce24cfc6 in caltri_ () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libsaturne-7.2.so
#14 0x00002b08cdf79efc in main () from /soft/saturne/neptune-7.2.0-openmpi4/code_saturne-7.2.0/arch/Linux_x86_64/lib/libcs_solver-7.2.so
#15 0x00002b08d2339555 in __libc_start_main () from /lib64/libc.so.6
#16 0x0000000000401789 in _start ()