error fix: “OpenBLAS blas_thread_init: pthread_create failed for thread 27 of 36: Resource temporarily unavailable”

Problem

When I tried to run a python script using numpy, it gave the following error.

$ python t3_batch.py
OpenBLAS blas_thread_init: pthread_create failed for thread 27 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max
OpenBLAS blas_thread_init: pthread_create failed for thread 28 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max
OpenBLAS blas_thread_init: pthread_create failed for thread 29 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max
OpenBLAS blas_thread_init: pthread_create failed for thread 30 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max
OpenBLAS blas_thread_init: pthread_create failed for thread 31 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max
OpenBLAS blas_thread_init: pthread_create failed for thread 32 of 36: Resource temporarily unavailable
OpenBLAS blas_thread_init: RLIMIT_NPROC 514120 current, 514120 max

Solution

found a solution from here

from the shell, execute the following

export OMP_NUM_THREADS=1
export USE_SIMPLE_THREADED_LEVEL3= 1