feat: Adding 'methodconfig' for all services in channel that allow to…

… retry (#3343)

* feat: Adding 'methodconfig' for all services in channel that allow to retry

* chore: adding changelog file 3343.miscellaneous.md

---------

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

doc/changelog.d/3343.miscellaneous.md

@@ -0,0 +1 @@
+feat: Adding 'methodconfig' for all services in channel to allow retry

src/ansys/mapdl/core/mapdl_grpc.py

@@ -26,6 +26,7 @@
 from functools import wraps
 import glob
 import io
+import json
 import os
 import pathlib
 import re
@@ -117,6 +118,25 @@
 
 SESSION_ID_NAME = "__PYMAPDL_SESSION_ID__"
 
+# Retry policy for gRPC calls.
+SERVICE_DEFAULT_CONFIG = {
+    # see https://github.com/grpc/proposal/blob/master/A6-client-retries.md#retry-policy-capabilities
+    "methodConfig": [
+        {
+            # Match all packages and services.
+            # Otherwise: "name": [{"service": "<package>.<service>"}],
+            "name": [{}],
+            "retryPolicy": {
+                "maxAttempts": 5,
+                "initialBackoff": "0.01s",
+                "maxBackoff": "3s",
+                "backoffMultiplier": 3,
+                "retryableStatusCodes": ["UNAVAILABLE", "RESOURCE_EXHAUSTED"],
+            },
+        }
+    ]
+}
+
 
 def chunk_raw(raw, save_as):
     with io.BytesIO(raw) as f:
@@ -490,6 +510,7 @@ def _create_channel(self, ip: str, port: int) -> grpc.Channel:
             channel_str,
             options=[
                 ("grpc.max_receive_message_length", MAX_MESSAGE_LENGTH),
+                ("grpc.service_config", json.dumps(SERVICE_DEFAULT_CONFIG)),
             ],
         )