Return version info from Ray client connect, to allow for discovering version mismatches

python/ray/tests/test_client.py

@@ -29,6 +29,11 @@ def test_num_clients(shutdown_only):
         api3 = RayAPIStub()
         info3 = api3.connect("localhost:50051")
         assert info3["num_clients"] == 1, info3
+
+        # Check info contains ray and python version.
+        assert isinstance(info3["ray_version"], str), info3
+        assert isinstance(info3["ray_commit"], str), info3
+        assert isinstance(info3["python_version"], str), info3
     finally:
         server.stop(0)
 

python/ray/util/client/server/dataservicer.py

@@ -1,5 +1,7 @@
+import ray
 import logging
 import grpc
+import sys
 
 from typing import TYPE_CHECKING
 from threading import Lock
@@ -51,7 +53,12 @@ class DataServicer(ray_client_pb2_grpc.RayletDataStreamerServicer):
                     with self._clients_lock:
                         cur_num_clients = self._num_clients
                     info = ray_client_pb2.ConnectionInfoResponse(
-                        num_clients=cur_num_clients)
+                        num_clients=cur_num_clients,
+                        python_version="{}.{}.{}".format(
+                            sys.version_info[0], sys.version_info[1],
+                            sys.version_info[2]),
+                        ray_version=ray.__version__,
+                        ray_commit=ray.__commit__)
                     resp = ray_client_pb2.DataResponse(connection_info=info)
                 else:
                     raise Exception(f"Unreachable code: Request type "

python/ray/util/client/worker.py

@@ -89,7 +89,12 @@ class Worker:
             data = self.data_client.ConnectionInfo()
         except grpc.RpcError as e:
             raise e.details()
-        return {"num_clients": data.num_clients}
+        return {
+            "num_clients": data.num_clients,
+            "python_version": data.python_version,
+            "ray_version": data.ray_version,
+            "ray_commit": data.ray_commit,
+        }
 
     def get(self, vals, *, timeout: Optional[float] = None) -> Any:
         to_get = []

src/ray/protobuf/ray_client.proto

@@ -260,6 +260,12 @@ message ConnectionInfoRequest {
 message ConnectionInfoResponse {
   // The number of data clients connected to the server, including the caller.
   int32 num_clients = 1;
+  // The Ray version (e.g., "1.2.0").
+  string ray_version = 2;
+  // The Ray commit (git sha1 hash).
+  string ray_commit = 3;
+  // The Python version (e.g., "3.7.2").
+  string python_version = 4;
 }
 
 message DataRequest {