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segmentation-faultopenmpimodulenotfounderrorqiskit

mpirun is unable to import installed packages

I am running qiskit code which execute fine when I invoke it with python3 but when called with mpirun, it executes SegmentationFault Errormentioning some Permission Errors. I run command as root , it says ModuleNotFoundError (which is already installed and working with normal execution - worth mentioning is this error started coming after restart)

sudo mpirun --allow-run-as-root python3 test-mpi.py

Traceback (most recent call last):
  File "/home/dell/qiskit-aer-main/demo-files/test-mpi.py", line 3, in <module>
from qiskit.providers.aer import *
ModuleNotFoundError: No module named 'qiskit.providers.aer'
Traceback (most recent call last):
  File "/home/dell/qiskit-aer-main/demo-files/test-mpi.py", line 3, in <module>
from qiskit.providers.aer import *
ModuleNotFoundError: No module named 'qiskit.providers.aer'
Traceback (most recent call last):
  File "/home/dell/qiskit-aer-main/demo-files/test-mpi.py", line 3, in <module>
from qiskit.providers.aer import *
ModuleNotFoundError: No module named 'qiskit.providers.aer'
Traceback (most recent call last):
  File "/home/dell/qiskit-aer-main/demo-files/test-mpi.py", line 3, in <module>
from qiskit.providers.aer import *
ModuleNotFoundError: No module named 'qiskit.providers.aer'
--------------------------------------------------------------------------
Primary job  terminated normally, but 1 process returned
a non-zero exit code. Per user-direction, the job has been aborted.
--------------------------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:

Process name: [[51849,1],0]
Exit code:    1

Below is code along with normal output

from qiskit import *
from qiskit.circuit.library import *
from qiskit.providers.aer import *
sim = AerSimulator(method='statevector')
shots = 100
depth=10
qubits = 35
circuit = transpile(QuantumVolume(qubits, depth, seed=0),
backend=sim,
optimization_level=0)
circuit.measure_all()
result = execute(circuit,sim,shots=shots,seed_simulator=12345).result()
if result.to_dict()['metadata']['mpi_rank'] == 0:
    print (result.to_dict()['metadata'])

Here is normal output case:

python3 test-mpi.py

{'time_taken_execute': 0.222742047, 'mpi_rank': 0, 'time_taken_parameter_binding': 8.8427e-05, 'num_mpi_processes': 1, 'num_processes_per_experiments': 1, 'omp_enabled': True, 'max_gpu_memory_mb': 0, 'max_memory_mb': 15903, 'parallel_experiments': 1}
Solution

  • I was able to solve this problem by manually adding paths in code:

    import sys
sys.path.append('/home/dell/.local/lib/python3.11/site-packages/')

    mpirun was having some issues with python virtual environment and couldn't load paths by itself.