I've run it through a debugger and produced a stack trace to see
where it hangs:
#0 0x9002cb18 in swtch_pri ()
#1 0x9002caf4 in sched_yield ()
#2 0x0031e270 in lam_ssi_rpi_usysv_advance_common ()
#3 0x002ee24c in _mpi_req_advance ()
#4 0x002f4c70 in MPI_Recv ()
#5 0x002e1e38 in lam_coll_alloc_inter_cid ()
#6 0x003322a4 in PMPI_Intercomm_merge ()
#7 0x00303690 in setup_local_comm_for_intercomm ()
#8 0x002ff798 in lam_ssi_coll_lam_basic_query ()
#9 0x002ff134 in check_module ()
#10 0x002fef08 in check_all_modules ()
#11 0x002fec08 in lam_ssi_coll_base_init_comm ()
#12 0x002df104 in MPI_Intercomm_create ()
#13 0x00002b74 in main ()
Thanks,
Chris
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