feat: avoiding reconnecting if MAPDL exited already (#3708)

* test: refactor check_stds and post_mortem_checks

* test: backing off algorithm

* chore: adding changelog file 3703.added.md [dependabot-skip]

* fix: codacity warnings

* feat: using get_value to obtain the n elements

* revert: revert "feat: using get_value to obtain the n elements"
Performance is not as go

This reverts commit 877f803.

* feat: using get_value to obtain the n elements

* revert: revert "feat: using get_value to obtain the n elements"
Performance is not as go

This reverts commit 877f803.

* feat: using mapdl.exit when raising final error.

* test: fix test by avoiding killing mapdl.

* fix: test

* fix: test

* feat: adding warnings when restarting MAPDL during testing

* fix: test

* feat: caching requires_package

* test: adding more tests

* chore: adding changelog file 3705.added.md [dependabot-skip]

* chore: adding changelog file 3705.added.md [dependabot-skip]

* fix: warnings import

* feat: not reconnecting if MAPDL already exited

* test: adding tests

* chore: adding changelog file 3708.miscellaneous.md [dependabot-skip]

* fix: tests

---------

Co-authored-by: pyansys-ci-bot <92810346+pyansys-ci-bot@users.noreply.github.com>

doc/changelog.d/3708.miscellaneous.md

@@ -0,0 +1 @@
+feat: avoiding reconnecting if MAPDL exited already

src/ansys/mapdl/core/errors.py

@@ -327,27 +327,29 @@ def wrapper(*args, **kwargs):
 
             except grpc.RpcError as error:
                 mapdl = retrieve_mapdl_from_args(args)
+
                 mapdl._log.debug("A gRPC error has been detected.")
 
-                i_attemps += 1
-                if i_attemps <= n_attempts:
+                if not mapdl.exited:
+                    i_attemps += 1
+                    if i_attemps <= n_attempts:
 
-                    wait = (
-                        initial_backoff * multiplier_backoff**i_attemps
-                    )  # Exponential backoff
+                        wait = (
+                            initial_backoff * multiplier_backoff**i_attemps
+                        )  # Exponential backoff
 
-                    # reconnect
-                    mapdl._log.debug(
-                        f"Re-connection attempt {i_attemps} after waiting {wait:0.3f} seconds"
-                    )
+                        # reconnect
+                        mapdl._log.debug(
+                            f"Re-connection attempt {i_attemps} after waiting {wait:0.3f} seconds"
+                        )
 
-                    if not mapdl.is_alive:
-                        connected = mapdl._connect(timeout=wait)
-                    else:
-                        sleep(wait)
+                        if not mapdl.is_alive:
+                            connected = mapdl._connect(timeout=wait)
+                        else:
+                            sleep(wait)
 
-                    # Retry again
-                    continue
+                        # Retry again
+                        continue
 
                 # Custom errors
                 reason = ""

tests/test_cli.py

@@ -112,6 +112,7 @@ def test_launch_mapdl_cli(monkeypatch, run_cli, start_instance):
     assert pid != 0
 
 
+@requires("click")
 @pytest.mark.parametrize(
     "mapping",
     ((False, True), (False, True, False), (False, False, False), (True, True, False)),

tests/test_mapdl.py

@@ -2749,7 +2749,8 @@ def test_comment_on_debug_mode(mapdl, cleared):
 
 @patch("ansys.mapdl.core.errors.N_ATTEMPTS", 2)
 @patch("ansys.mapdl.core.errors.MULTIPLIER_BACKOFF", 1)
-def test_timeout_when_exiting(mapdl):
+@pytest.mark.parametrize("is_exited", [True, False])
+def test_timeout_when_exiting(mapdl, is_exited):
     from ansys.mapdl.core import errors
 
     def raise_exception(*args, **kwargs):
@@ -2759,9 +2760,13 @@ def raise_exception(*args, **kwargs):
         e.code = lambda: grpc.StatusCode.ABORTED
         e.details = lambda: "My gRPC error details"
 
+        # Simulating MAPDL exiting by force
+        mapdl._exited = is_exited
+
         raise e
 
     handle_generic_grpc_error = errors.handle_generic_grpc_error
+
     with (
         patch("ansys.mapdl.core.mapdl_grpc.pb_types.CmdRequest") as mock_cmdrequest,
         patch(
@@ -2787,9 +2792,17 @@ def raise_exception(*args, **kwargs):
         assert mapdl._exited
 
         assert mock_handle.call_count == 1
-        assert mock_connect.call_count == errors.N_ATTEMPTS
-        assert mock_cmdrequest.call_count == errors.N_ATTEMPTS + 1
-        assert mock_is_alive.call_count == errors.N_ATTEMPTS + 1
+
+        if is_exited:
+            # Checking no trying to reconnect
+            assert mock_connect.call_count == 0
+            assert mock_cmdrequest.call_count == 1
+            assert mock_is_alive.call_count == 1
+
+        else:
+            assert mock_connect.call_count == errors.N_ATTEMPTS
+            assert mock_cmdrequest.call_count == errors.N_ATTEMPTS + 1
+            assert mock_is_alive.call_count == errors.N_ATTEMPTS + 1
 
         mapdl._exited = False
 
@@ -2838,6 +2851,7 @@ def test_none_on_selecting(mapdl, cleared, func):
     assert len(selfunc(None)) == 0
 
 
+@requires("pyvista")
 def test_requires_package_speed():
     from ansys.mapdl.core.misc import requires_package