Set _active flag to false if session already closed (#1780)

* Set _active flag to false if session already closed

* release note

* Add test

qiskit_ibm_runtime/session.py

@@ -369,13 +369,16 @@ def from_id(
         response = service._api_client.session_details(session_id)
         backend = response.get("backend_name")
         mode = response.get("mode")
+        state = response.get("state")
         class_name = "dedicated" if cls.__name__.lower() == "session" else cls.__name__.lower()
         if mode != class_name:
             raise IBMInputValueError(
                 f"Input ID {session_id} has execution mode {mode} instead of {class_name}."
             )
 
         session = cls(service, backend)
+        if state == "closed":
+            session._active = False
         session._session_id = session_id
         return session
 

release-notes/unreleased/1780.feat.rst

@@ -0,0 +1,2 @@
+If jobs are run in a session created with :meth:`QiskitRuntimeService.Session.from_id` where the 
+session is already closed, the jobs are rejected immediately.

test/integration/test_session.py

@@ -107,6 +107,9 @@ def test_session_from_id(self, service):
 
         new_session = Session.from_id(session_id=session._session_id, service=service)
         self.assertEqual(session._session_id, new_session._session_id)
+        self.assertTrue(new_session._active)
+        new_session.close()
+        self.assertFalse(new_session._active)
 
         with self.assertRaises(IBMInputValueError):
             Batch.from_id(session_id=session._session_id, service=service)