Fix spec for GroupCoordinatorResponse_v1 (#961)

aiokafka/admin/client.py

@@ -46,7 +46,7 @@ class AIOKafkaAdminClient:
             each request to servers and can be used to identify specific
             server-side log entries that correspond to this client. Also
             submitted to GroupCoordinator for logging with respect to
-            consumer group administration. Default: 'kafka-python-{version}'
+            consumer group administration. Default: 'aiokafka-{version}'
         request_timeout_ms (int): Client request timeout in milliseconds.
             Default: 40000.
         connections_max_idle_ms: Close idle connections after the number of
@@ -508,10 +508,7 @@ async def find_coordinator(self, group_id: str, coordinator_type: int = 0) -> in
 
         :return int: the acting coordinator broker id
         """
-        # FIXME GroupCoordinatorRequest_v1 in kafka-python 2.0.2 doesn't match
-        # spec causing "ValueError: Buffer underrun decoding string"
-        # version = self._matching_api_version(GroupCoordinatorRequest)
-        version = self._matching_api_version(GroupCoordinatorRequest[:1])
+        version = self._matching_api_version(GroupCoordinatorRequest)
         if version == 0 and coordinator_type:
             raise IncompatibleBrokerVersion(
                 "Cannot query for transaction id on current broker version"

aiokafka/protocol/commit.py

@@ -280,6 +280,7 @@ class GroupCoordinatorResponse_v1(Response):
     API_KEY = 10
     API_VERSION = 1
     SCHEMA = Schema(
+        ("throttle_time_ms", Int32),
         ("error_code", Int16),
         ("error_message", String("utf-8")),
         ("coordinator_id", Int32),
@@ -292,14 +293,19 @@ class GroupCoordinatorRequest_v0(Request):
     API_KEY = 10
     API_VERSION = 0
     RESPONSE_TYPE = GroupCoordinatorResponse_v0
-    SCHEMA = Schema(("consumer_group", String("utf-8")))
+    SCHEMA = Schema(
+        ("consumer_group", String("utf-8")),
+    )
 
 
 class GroupCoordinatorRequest_v1(Request):
     API_KEY = 10
     API_VERSION = 1
     RESPONSE_TYPE = GroupCoordinatorResponse_v1
-    SCHEMA = Schema(("coordinator_key", String("utf-8")), ("coordinator_type", Int8))
+    SCHEMA = Schema(
+        ("coordinator_key", String("utf-8")),
+        ("coordinator_type", Int8),
+    )
 
 
 GroupCoordinatorRequest = [GroupCoordinatorRequest_v0, GroupCoordinatorRequest_v1]