def _send_broker_unaware_request(self, payloads, encoder_fn, decoder_fn):
"""
Attempt to send a broker-agnostic request to one of the available
brokers. Keep trying until you succeed.
"""
hosts = set()
for broker in self.brokers.values():
host, port, afi = get_ip_port_afi(broker.host)
hosts.add((host, broker.port, afi))
hosts.update(self.hosts)
hosts = list(hosts)
random.shuffle(hosts)
for (host, port, afi) in hosts:
try:
conn = self._get_conn(host, port, afi)
except ConnectionError:
log.warning("Skipping unconnected connection: %s:%s (AFI %s)",
host, port, afi)
continue
request = encoder_fn(payloads=payloads)
future = conn.send(request)
# Block
while not future.is_done:
conn.recv()
if future.failed():
log.error("Request failed: %s", future.exception)
continue
return decoder_fn(future.value)
raise KafkaUnavailableError('All servers failed to process request: %s' % hosts)
def _maybe_connect(self, node_id):
"""Idempotent non-blocking connection attempt to the given node id."""
with self._lock:
broker = self.cluster.broker_metadata(node_id)
conn = self._conns.get(node_id)
if conn is None:
assert broker, 'Broker id %s not in current metadata' % node_id
log.debug("Initiating connection to node %s at %s:%s",
node_id, broker.host, broker.port)
host, port, afi = get_ip_port_afi(broker.host)
cb = functools.partial(WeakMethod(self._conn_state_change), node_id)
conn = BrokerConnection(host, broker.port, afi,
state_change_callback=cb,
node_id=node_id,
**self.config)
self._conns[node_id] = conn
# Check if existing connection should be recreated because host/port changed
elif conn.disconnected() and broker is not None:
host, _, __ = get_ip_port_afi(broker.host)
if conn.host != host or conn.port != broker.port:
log.info("Broker metadata change detected for node %s"
" from %s:%s to %s:%s", node_id, conn.host, conn.port,
broker.host, broker.port)
# Drop old connection object.
# It will be recreated on next _maybe_connect
self._conns.pop(node_id)
return False
elif conn.connected():
return True
conn.connect()
return conn.connected()
def _send_broker_unaware_request(self, payloads, encoder_fn, decoder_fn):
"""
Attempt to send a broker-agnostic request to one of the available
brokers. Keep trying until you succeed.
"""
hosts = set()
for broker in self.brokers.values():
host, port, afi = get_ip_port_afi(broker.host)
hosts.add((host, broker.port, afi))
hosts.update(self.hosts)
hosts = list(hosts)
random.shuffle(hosts)
for (host, port, afi) in hosts:
try:
conn = self._get_conn(host, port, afi)
except ConnectionError:
log.warning("Skipping unconnected connection: %s:%s (AFI %s)",
host, port, afi)
continue
request = encoder_fn(payloads=payloads)
future = conn.send(request)
# Block
while not future.is_done:
conn.recv()
if future.failed():
log.error("Request failed: %s", future.exception)
continue
return decoder_fn(future.value)
raise KafkaUnavailableError(
'All servers failed to process request: %s' % hosts)
def _send_consumer_aware_request(self, group, payloads, encoder_fn,
decoder_fn):
"""
Send a list of requests to the consumer coordinator for the group
specified using the supplied encode/decode functions. As the payloads
that use consumer-aware requests do not contain the group (e.g.
OffsetFetchRequest), all payloads must be for a single group.
Arguments:
group: the name of the consumer group (str) the payloads are for
payloads: list of object-like entities with topic (str) and
partition (int) attributes; payloads with duplicate
topic+partition are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
broker = self._get_coordinator_for_group(group)
# Send the list of request payloads and collect the responses and
# errors
responses = {}
request_id = self._next_id()
log.debug('Request %s to %s: %s', request_id, broker, payloads)
request = encoder_fn(client_id=self.client_id,
correlation_id=request_id,
payloads=payloads)
# Send the request, recv the response
try:
host, port, afi = get_ip_port_afi(broker.host)
conn = self._get_conn(host, broker.port, afi)
conn.send(request_id, request)
except ConnectionError as e:
log.warning(
'ConnectionError attempting to send request %s '
'to server %s: %s', request_id, broker, e)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
# No exception, try to get response
else:
# decoder_fn=None signal that the server is expected to not
# send a response. This probably only applies to
# ProduceRequest w/ acks = 0
if decoder_fn is None:
log.debug(
'Request %s does not expect a response '
'(skipping conn.recv)', request_id)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = None
return []
try:
response = conn.recv(request_id)
except ConnectionError as e:
log.warning(
'ConnectionError attempting to receive a '
'response to request %s from server %s: %s', request_id,
broker, e)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
else:
_resps = []
for payload_response in decoder_fn(response):
topic_partition = (payload_response.topic,
payload_response.partition)
responses[topic_partition] = payload_response
_resps.append(payload_response)
log.debug('Response %s: %s', request_id, _resps)
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_broker_aware_request(self, payloads, encoder_fn, decoder_fn):
"""
Group a list of request payloads by topic+partition and send them to
the leader broker for that partition using the supplied encode/decode
functions
Arguments:
payloads: list of object-like entities with a topic (str) and
partition (int) attribute; payloads with duplicate topic-partitions
are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
# Connection errors generally mean stale metadata
# although sometimes it means incorrect api request
# Unfortunately there is no good way to tell the difference
# so we'll just reset metadata on all errors to be safe
refresh_metadata = False
# For each broker, send the list of request payloads
# and collect the responses and errors
payloads_by_broker = self._payloads_by_broker(payloads)
responses = {}
def failed_payloads(payloads):
for payload in payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[(topic_partition)] = FailedPayloadsError(payload)
# For each BrokerConnection keep the real socket so that we can use
# a select to perform unblocking I/O
connections_by_future = {}
for broker, broker_payloads in six.iteritems(payloads_by_broker):
if broker is None:
failed_payloads(broker_payloads)
continue
host, port, afi = get_ip_port_afi(broker.host)
try:
conn = self._get_conn(host, broker.port, afi)
except ConnectionError:
refresh_metadata = True
failed_payloads(broker_payloads)
continue
request = encoder_fn(payloads=broker_payloads)
future = conn.send(request)
if future.failed():
refresh_metadata = True
failed_payloads(broker_payloads)
continue
if not request.expect_response():
for payload in broker_payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = None
continue
connections_by_future[future] = (conn, broker)
conn = None
while connections_by_future:
futures = list(connections_by_future.keys())
# block until a socket is ready to be read
sockets = [
conn._sock
for future, (conn, _) in six.iteritems(connections_by_future)
if not future.is_done and conn._sock is not None
]
if sockets:
read_socks, _, _ = select.select(sockets, [], [])
for future in futures:
if not future.is_done:
conn, _ = connections_by_future[future]
conn.recv()
continue
_, broker = connections_by_future.pop(future)
if future.failed():
refresh_metadata = True
failed_payloads(payloads_by_broker[broker])
else:
for payload_response in decoder_fn(future.value):
topic_partition = (str(payload_response.topic),
payload_response.partition)
responses[topic_partition] = payload_response
if refresh_metadata:
self.reset_all_metadata()
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_consumer_aware_request(self, group, payloads, encoder_fn, decoder_fn):
"""
Send a list of requests to the consumer coordinator for the group
specified using the supplied encode/decode functions. As the payloads
that use consumer-aware requests do not contain the group (e.g.
OffsetFetchRequest), all payloads must be for a single group.
Arguments:
group: the name of the consumer group (str) the payloads are for
payloads: list of object-like entities with topic (str) and
partition (int) attributes; payloads with duplicate
topic+partition are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
retries = 0
broker = None
while not broker:
try:
broker = self._get_coordinator_for_group(group)
except (GroupCoordinatorNotAvailableError, GroupLoadInProgressError) as e:
if retries == CONSUMER_OFFSET_TOPIC_CREATION_RETRIES:
raise e
time.sleep(CONSUMER_OFFSET_RETRY_INTERVAL_SEC)
retries += 1
# Send the list of request payloads and collect the responses and
# errors
responses = {}
def failed_payloads(payloads):
for payload in payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
host, port, afi = get_ip_port_afi(broker.host)
try:
conn = self._get_conn(host, broker.port, afi)
except ConnectionError:
failed_payloads(payloads)
else:
request = encoder_fn(payloads=payloads)
# decoder_fn=None signal that the server is expected to not
# send a response. This probably only applies to
# ProduceRequest w/ acks = 0
future = conn.send(request)
while not future.is_done:
for r, f in conn.recv():
f.success(r)
if future.failed():
failed_payloads(payloads)
elif not request.expect_response():
failed_payloads(payloads)
else:
for payload_response in decoder_fn(future.value):
topic_partition = (str(payload_response.topic),
payload_response.partition)
responses[topic_partition] = payload_response
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_consumer_aware_request(self, group, payloads, encoder_fn, decoder_fn):
"""
Send a list of requests to the consumer coordinator for the group
specified using the supplied encode/decode functions. As the payloads
that use consumer-aware requests do not contain the group (e.g.
OffsetFetchRequest), all payloads must be for a single group.
Arguments:
group: the name of the consumer group (str) the payloads are for
payloads: list of object-like entities with topic (str) and
partition (int) attributes; payloads with duplicate
topic+partition are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
broker = self._get_coordinator_for_group(group)
# Send the list of request payloads and collect the responses and
# errors
responses = {}
request_id = self._next_id()
log.debug('Request %s to %s: %s', request_id, broker, payloads)
request = encoder_fn(client_id=self.client_id,
correlation_id=request_id, payloads=payloads)
# Send the request, recv the response
try:
host, port, afi = get_ip_port_afi(broker.host)
conn = self._get_conn(host, broker.port, afi)
conn.send(request_id, request)
except ConnectionError as e:
log.warning('ConnectionError attempting to send request %s '
'to server %s: %s', request_id, broker, e)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
# No exception, try to get response
else:
# decoder_fn=None signal that the server is expected to not
# send a response. This probably only applies to
# ProduceRequest w/ acks = 0
if decoder_fn is None:
log.debug('Request %s does not expect a response '
'(skipping conn.recv)', request_id)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = None
return []
try:
response = conn.recv(request_id)
except ConnectionError as e:
log.warning('ConnectionError attempting to receive a '
'response to request %s from server %s: %s',
request_id, broker, e)
for payload in payloads:
topic_partition = (payload.topic, payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
else:
_resps = []
for payload_response in decoder_fn(response):
topic_partition = (payload_response.topic,
payload_response.partition)
responses[topic_partition] = payload_response
_resps.append(payload_response)
log.debug('Response %s: %s', request_id, _resps)
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_broker_aware_request(self, payloads, encoder_fn, decoder_fn):
"""
Group a list of request payloads by topic+partition and send them to
the leader broker for that partition using the supplied encode/decode
functions
Arguments:
payloads: list of object-like entities with a topic (str) and
partition (int) attribute; payloads with duplicate topic-partitions
are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
# Connection errors generally mean stale metadata
# although sometimes it means incorrect api request
# Unfortunately there is no good way to tell the difference
# so we'll just reset metadata on all errors to be safe
refresh_metadata = False
# For each broker, send the list of request payloads
# and collect the responses and errors
payloads_by_broker = self._payloads_by_broker(payloads)
responses = {}
def failed_payloads(payloads):
for payload in payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[(topic_partition)] = FailedPayloadsError(payload)
# For each BrokerConnection keep the real socket so that we can use
# a select to perform unblocking I/O
connections_by_future = {}
for broker, broker_payloads in six.iteritems(payloads_by_broker):
if broker is None:
failed_payloads(broker_payloads)
continue
host, port, afi = get_ip_port_afi(broker.host)
try:
conn = self._get_conn(host, broker.port, afi)
except ConnectionError:
refresh_metadata = True
failed_payloads(broker_payloads)
continue
request = encoder_fn(payloads=broker_payloads)
future = conn.send(request)
if future.failed():
refresh_metadata = True
failed_payloads(broker_payloads)
continue
if not request.expect_response():
for payload in broker_payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = None
continue
connections_by_future[future] = (conn, broker)
conn = None
while connections_by_future:
futures = list(connections_by_future.keys())
# block until a socket is ready to be read
sockets = [
conn._sock
for future, (conn, _) in six.iteritems(connections_by_future)
if not future.is_done and conn._sock is not None]
if sockets:
read_socks, _, _ = select.select(sockets, [], [])
for future in futures:
if not future.is_done:
conn, _ = connections_by_future[future]
conn.recv()
continue
_, broker = connections_by_future.pop(future)
if future.failed():
refresh_metadata = True
failed_payloads(payloads_by_broker[broker])
else:
for payload_response in decoder_fn(future.value):
topic_partition = (str(payload_response.topic),
payload_response.partition)
responses[topic_partition] = payload_response
if refresh_metadata:
self.reset_all_metadata()
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_consumer_aware_request(self, group, payloads, encoder_fn, decoder_fn):
"""
Send a list of requests to the consumer coordinator for the group
specified using the supplied encode/decode functions. As the payloads
that use consumer-aware requests do not contain the group (e.g.
OffsetFetchRequest), all payloads must be for a single group.
Arguments:
group: the name of the consumer group (str) the payloads are for
payloads: list of object-like entities with topic (str) and
partition (int) attributes; payloads with duplicate
topic+partition are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
retries = 0
broker = None
while not broker:
try:
broker = self._get_coordinator_for_group(group)
except (GroupCoordinatorNotAvailableError, GroupLoadInProgressError) as e:
if retries == CONSUMER_OFFSET_TOPIC_CREATION_RETRIES:
raise e
time.sleep(CONSUMER_OFFSET_RETRY_INTERVAL_SEC)
retries += 1
# Send the list of request payloads and collect the responses and
# errors
responses = {}
def failed_payloads(payloads):
for payload in payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
host, port, afi = get_ip_port_afi(broker.host)
try:
conn = self._get_conn(host, broker.port, afi, broker.nodeId)
except ConnectionError:
failed_payloads(payloads)
else:
request = encoder_fn(payloads=payloads)
# decoder_fn=None signal that the server is expected to not
# send a response. This probably only applies to
# ProduceRequest w/ acks = 0
expect_response = (decoder_fn is not None)
future = conn.send(request, expect_response=expect_response)
while not future.is_done:
conn.recv()
if future.failed():
failed_payloads(payloads)
elif not expect_response:
failed_payloads(payloads)
else:
for payload_response in decoder_fn(future.value):
topic_partition = (str(payload_response.topic),
payload_response.partition)
responses[topic_partition] = payload_response
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def _send_broker_aware_request(self, payloads, encoder_fn, decoder_fn):
"""
Group a list of request payloads by topic+partition and send them to
the leader broker for that partition using the supplied encode/decode
functions
Arguments:
payloads: list of object-like entities with a topic (str) and
partition (int) attribute; payloads with duplicate topic-partitions
are not supported.
encode_fn: a method to encode the list of payloads to a request body,
must accept client_id, correlation_id, and payloads as
keyword arguments
decode_fn: a method to decode a response body into response objects.
The response objects must be object-like and have topic
and partition attributes
Returns:
List of response objects in the same order as the supplied payloads
"""
# encoders / decoders do not maintain ordering currently
# so we need to keep this so we can rebuild order before returning
original_ordering = [(p.topic, p.partition) for p in payloads]
# Connection errors generally mean stale metadata
# although sometimes it means incorrect api request
# Unfortunately there is no good way to tell the difference
# so we'll just reset metadata on all errors to be safe
refresh_metadata = False
# For each broker, send the list of request payloads
# and collect the responses and errors
payloads_by_broker = self._payloads_by_broker(payloads)
responses = {}
def failed_payloads(payloads):
for payload in payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = FailedPayloadsError(payload)
futures_by_connection = {}
selector = selectors.DefaultSelector()
for broker, broker_payloads in six.iteritems(payloads_by_broker):
if broker is None:
failed_payloads(broker_payloads)
continue
host, port, afi = get_ip_port_afi(broker.host)
try:
conn = self._get_conn(host, broker.port, afi, broker.nodeId)
except ConnectionError:
refresh_metadata = True
failed_payloads(broker_payloads)
continue
request = encoder_fn(payloads=broker_payloads)
# decoder_fn=None signal that the server is expected to not
# send a response. This probably only applies to
# ProduceRequest w/ acks = 0
expect_response = (decoder_fn is not None)
if expect_response:
selector.register(conn._sock, selectors.EVENT_READ, conn)
future = conn.send(request, expect_response=expect_response)
if future.failed():
log.error("Request failed: %s", future.exception)
selector.unregister(conn._sock)
refresh_metadata = True
failed_payloads(broker_payloads)
continue
if not expect_response:
for payload in broker_payloads:
topic_partition = (str(payload.topic), payload.partition)
responses[topic_partition] = None
continue
futures_by_connection[conn] = (future, broker)
timeout = self.timeout
while futures_by_connection:
start_time = time.time()
ready = selector.select(timeout)
for key, _ in ready:
conn = key.data
future, _ = futures_by_connection[conn]
while not future.is_done:
conn.recv()
_, broker = futures_by_connection.pop(conn)
if future.failed():
log.error("Request failed: %s", future.exception)
refresh_metadata = True
failed_payloads(payloads_by_broker[broker])
else:
for payload_response in decoder_fn(future.value):
topic_partition = (str(payload_response.topic),
payload_response.partition)
responses[topic_partition] = payload_response
timeout -= time.time() - start_time
if timeout < 0:
log.error("%s requests timed out.", len(futures_by_connection))
for _, broker in six.itervalues(futures_by_connection):
failed_payloads(payloads_by_broker[broker])
refresh_metadata = True
break
if refresh_metadata:
self.reset_all_metadata()
selector.close()
# Return responses in the same order as provided
return [responses[tp] for tp in original_ordering]
def load_metadata_for_topics(self, *topics, **kwargs):
"""Fetch broker and topic-partition metadata from the server.
Updates internal data: broker list, topic/partition list, and
topic/parition -> broker map. This method should be called after
receiving any error.
Note: Exceptions *will not* be raised in a full refresh (i.e. no topic
list). In this case, error codes will be logged as errors.
Partition-level errors will also not be raised here (a single partition
w/o a leader, for example).
Arguments:
*topics (optional): If a list of topics is provided,
the metadata refresh will be limited to the specified topics
only.
ignore_leadernotavailable (bool): suppress LeaderNotAvailableError
so that metadata is loaded correctly during auto-create.
Default: False.
Raises:
UnknownTopicOrPartitionError: Raised for topics that do not exist,
unless the broker is configured to auto-create topics.
LeaderNotAvailableError: Raised for topics that do not exist yet,
when the broker is configured to auto-create topics. Retry
after a short backoff (topics/partitions are initializing).
"""
if 'ignore_leadernotavailable' in kwargs:
ignore_leadernotavailable = kwargs['ignore_leadernotavailable']
else:
ignore_leadernotavailable = False
if topics:
self.reset_topic_metadata(*topics)
else:
self.reset_all_metadata()
resp = self.send_metadata_request(topics)
log.debug('Updating broker metadata: %s', resp.brokers)
log.debug('Updating topic metadata: %s',
[topic for _, topic, _ in resp.topics])
if not self._specific_broker:
self.brokers = dict([(nodeId,
BrokerMetadata(nodeId, host, port, None))
for nodeId, host, port in resp.brokers])
else:
for nodeId, host, port in resp.brokers:
if str(host) + ':' + str(port) == self._specific_broker:
self.brokers = {
nodeId: BrokerMetadata(nodeId, host, port, None)
}
break
if not self.brokers:
h, p, a = get_ip_port_afi(self._specific_broker)
self.brokers = {1010: BrokerMetadata(1010, h, p, None)}
# raise ReplicaNotAvailableError("%s" % self._specific_broker)
for error, topic, partitions in resp.topics:
# Errors expected for new topics
if error:
error_type = kafka.errors.kafka_errors.get(error, UnknownError)
if error_type in (UnknownTopicOrPartitionError,
LeaderNotAvailableError):
log.error('Error loading topic metadata for %s: %s (%s)',
topic, error_type, error)
if topic not in topics:
continue
elif (error_type is LeaderNotAvailableError):
# elif (error_type is LeaderNotAvailableError and
# ignore_leadernotavailable):
continue
raise error_type(topic)
self.topic_partitions[topic] = {}
for error, partition, leader, _, _ in partitions:
self.topic_partitions[topic][partition] = leader
# Populate topics_to_brokers dict
topic_part = TopicPartition(topic, partition)
# Check for partition errors
if error:
error_type = kafka.errors.kafka_errors.get(
error, UnknownError)
# If No Leader, topics_to_brokers topic_partition -> None
if error_type is LeaderNotAvailableError:
log.error('No leader for topic %s partition %d', topic,
partition)
self.topics_to_brokers[topic_part] = None
continue
# If one of the replicas is unavailable -- ignore
# this error code is provided for admin purposes only
# we never talk to replicas, only the leader
elif error_type is ReplicaNotAvailableError:
log.debug(
'Some (non-leader) replicas not available for topic %s partition %d',
topic, partition)
else:
raise error_type(topic_part)
# If Known Broker, topic_partition -> BrokerMetadata
if leader in self.brokers:
self.topics_to_brokers[topic_part] = self.brokers[leader]
# If Unknown Broker, fake BrokerMetadata so we don't lose the id
# (not sure how this could happen. server could be in bad state)
else:
self.topics_to_brokers[topic_part] = BrokerMetadata(
leader, None, None, None)
