I compiled quantum espresso 5.4 with intel mpi and mkl 2016 update 3. However, when I ran pw.x the following errors were reported:
... MPIR_Get_contextid_sparse_group(1330): Too many communicators (0/16384 free on this process; ignore_id=0) Fatal error in PMPI_Cart_sub: Other MPI error, error stack: PMPI_Cart_sub(242)...................: MPI_Cart_sub(comm=0xc400fcf3, remain_dims=0x7ffde1391dd8, comm_new=0x7ffde1391d30) failed PMPI_Cart_sub(178)...................: MPIR_Comm_split_impl(270)............: MPIR_Get_contextid_sparse_group(1330): Too many communicators (0/16384 free on this process; ignore_id=0) Fatal error in PMPI_Cart_sub: Other MPI error, error stack: PMPI_Cart_sub(242)...................: MPI_Cart_sub(comm=0xc400fcf3, remain_dims=0x7ffc02ad7eb8, comm_new=0x7ffc02ad7e10) failed PMPI_Cart_sub(178)...................: MPIR_Comm_split_impl(270)............: MPIR_Get_contextid_sparse_group(1330): Too many communicators (0/16384 free on this process; ignore_id=0) Fatal error in PMPI_Cart_sub: Other MPI error, error stack: PMPI_Cart_sub(242)...................: MPI_Cart_sub(comm=0xc400fcf3, remain_dims=0x7fffb24e60f8, comm_new=0x7fffb24e6050) failed PMPI_Cart_sub(178)...................: MPIR_Comm_split_impl(270)............: MPIR_Get_contextid_sparse_group(1330): Too many communicators (0/16384 free on this process; ignore_id=0) I googled and found out this might be caused by hitting os limits of number of opened files. However, After I increased number of opened files per process from 1024 to 40960, the error persists. What's wrong here? Chong Wang Ph. D. candidate Institute for Advanced Study, Tsinghua University, Beijing, 100084
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