SlurmScheduler: Parse the NODE_FAIL state

If a job fails due to a node failure, SLURM will set the job's state to
`NODE_FAIL`. The `SlurmScheduler.parse_output` method is updated to
check for this state, in which case the `ERROR_SCHEDULER_NODE_FAILURE`
exit code is returned. This is a new exit code defined on the `CalcJob`
base class.

aiida/engine/processes/calcjobs/calcjob.py

@@ -455,6 +455,9 @@ def define(cls, spec: CalcJobProcessSpec) -> None:  # type: ignore[override]
         spec.exit_code(
             131, 'ERROR_SCHEDULER_INVALID_ACCOUNT', invalidates_cache=True, message='The specified account is invalid.'
         )
+        spec.exit_code(
+            140, 'ERROR_SCHEDULER_NODE_FAILURE', invalidates_cache=True, message='The node running the job failed.'
+        )
         spec.exit_code(150, 'STOPPED_BY_MONITOR', invalidates_cache=True, message='{message}')
 
     @classproperty

aiida/schedulers/plugins/slurm.py

@@ -767,6 +767,9 @@ def parse_output(self, detailed_job_info=None, stdout=None, stderr=None):
             if data['State'] == 'TIMEOUT':
                 return CalcJob.exit_codes.ERROR_SCHEDULER_OUT_OF_WALLTIME
 
+            if data['State'] == 'NODE_FAIL':
+                return CalcJob.exit_codes.ERROR_SCHEDULER_NODE_FAILURE
+
         # Alternatively, if the ``detailed_job_info`` is not defined or hasn't already determined an error, try to match
         # known error messages from the output written to the ``stderr`` descriptor.
         if stderr is not None:

tests/schedulers/test_slurm.py

@@ -431,6 +431,20 @@ def test_parse_out_of_memory():
     assert exit_code == CalcJob.exit_codes.ERROR_SCHEDULER_OUT_OF_MEMORY  # pylint: disable=no-member
 
 
+def test_parse_node_failure():
+    """Test that `ERROR_SCHEDULER_NODE_FAILURE` code is returned if `STATE == NODE_FAIL`."""
+    scheduler = SlurmScheduler()
+    detailed_job_info = {
+        'retval': 0,
+        'stderr': '',
+        'stdout': """||||||||||||||||||||||||||||||||||||||||||||||||||
+        |||||||||||||||||||||||||||||||||||||||||NODE_FAIL|||||||||"""
+    }  # yapf: disable
+
+    exit_code = scheduler.parse_output(detailed_job_info, '', '')
+    assert exit_code == CalcJob.exit_codes.ERROR_SCHEDULER_NODE_FAILURE  # pylint: disable=no-member
+
+
 @pytest.mark.parametrize('detailed_job_info, expected', [
     ('string', TypeError),  # Not a dictionary
     ({'stderr': ''}, ValueError),  # Key `stdout` missing