openstack
/
deb-python-kafka
Code Issues Proposed changes

Short-circuit group coordinator requests when NodeNotReady (#995)

This commit is contained in:
Dana Powers 2017-03-09 14:26:09 -08:00 committed by GitHub
parent 6ef7675ba0
commit bb709f4c14
1 changed files with 23 additions and 0 deletions
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23
kafka/coordinator/base.py
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@ -286,6 +286,10 @@ class BaseCoordinator(object):
e = Errors.GroupCoordinatorNotAvailableError(self.coordinator_id)
return Future().failure(e)
elif not self._client.ready(self.coordinator_id, metadata_priority=False):
e = Errors.NodeNotReadyError(self.coordinator_id)
return Future().failure(e)
# send a join group request to the coordinator
log.info("(Re-)joining group %s", self.group_id)
request = JoinGroupRequest[0](
@ -416,6 +420,13 @@ class BaseCoordinator(object):
if self.coordinator_unknown():
e = Errors.GroupCoordinatorNotAvailableError(self.coordinator_id)
return Future().failure(e)
# We assume that coordinator is ready if we're sending SyncGroup
# as it typically follows a successful JoinGroup
# Also note that if client.ready() enforces a metadata priority policy,
# we can get into an infinite loop if the leader assignment process
# itself requests a metadata update
future = Future()
_f = self._client.send(self.coordinator_id, request)
_f.add_callback(self._handle_sync_group_response, future, time.time())
@ -467,6 +478,10 @@ class BaseCoordinator(object):
if node_id is None:
return Future().failure(Errors.NoBrokersAvailable())
elif not self._client.ready(node_id, metadata_priority=False):
e = Errors.NodeNotReadyError(node_id)
return Future().failure(e)
log.debug("Sending group coordinator request for group %s to broker %s",
self.group_id, node_id)
request = GroupCoordinatorRequest[0](self.group_id)
@ -553,6 +568,14 @@ class BaseCoordinator(object):
def _send_heartbeat_request(self):
"""Send a heartbeat request"""
if self.coordinator_unknown():
e = Errors.GroupCoordinatorNotAvailableError(self.coordinator_id)
return Future().failure(e)
elif not self._client.ready(self.coordinator_id, metadata_priority=False):
e = Errors.NodeNotReadyError(self.coordinator_id)
return Future().failure(e)
request = HeartbeatRequest[0](self.group_id, self.generation, self.member_id)
log.debug("Heartbeat: %s[%s] %s", request.group, request.generation_id, request.member_id) # pylint: disable-msg=no-member
future = Future()