async def _wait_on_metadata(self, topic):
"""
Wait for cluster metadata including partitions for the given topic to
be available.
Arguments:
topic (str): topic we want metadata for
Returns:
set: partition ids for the topic
Raises:
UnknownTopicOrPartitionError: if no topic or partitions found
in cluster metadata
"""
if topic in self.cluster.topics():
return self.cluster.partitions_for_topic(topic)
# add topic to metadata topic list if it is not there already.
self.add_topic(topic)
t0 = self._loop.time()
while True:
await self.force_metadata_update()
if topic in self.cluster.topics():
break
if (self._loop.time() - t0) > (self._request_timeout_ms / 1000):
raise UnknownTopicOrPartitionError()
if topic in self.cluster.unauthorized_topics:
raise Errors.TopicAuthorizationFailedError(topic)
await asyncio.sleep(self._retry_backoff, loop=self._loop)
return self.cluster.partitions_for_topic(topic)
def _proc_fetch_request(self, assignment, node_id, request):
needs_wakeup = False
try:
response = yield from self._client.send(node_id, request)
except Errors.KafkaError as err:
log.error("Failed fetch messages from %s: %s", node_id, err)
return False
except asyncio.CancelledError:
# Either `close()` or partition unassigned. Either way the result
# is no longer of interest.
return False
if not assignment.active:
log.debug(
"Discarding fetch response since the assignment changed during"
" fetch")
return False
fetch_offsets = {}
for topic, partitions in request.topics:
for partition, offset, _ in partitions:
fetch_offsets[TopicPartition(topic, partition)] = offset
for topic, partitions in response.topics:
for partition, error_code, highwater, *part_data in partitions:
tp = TopicPartition(topic, partition)
error_type = Errors.for_code(error_code)
fetch_offset = fetch_offsets[tp]
tp_state = assignment.state_value(tp)
if not tp_state.has_valid_position or \
tp_state.position != fetch_offset:
log.debug(
"Discarding fetch response for partition %s "
"since its offset %s does not match the current "
"position", tp, fetch_offset)
continue
if error_type is Errors.NoError:
tp_state.highwater = highwater
# part_data also contains lso, aborted_transactions.
# message_set is last
records = MemoryRecords(part_data[-1])
if records.has_next():
log.debug(
"Adding fetched record for partition %s with"
" offset %d to buffered record list", tp,
fetch_offset)
message_iterator = self._unpack_records(tp, records)
self._records[tp] = FetchResult(
tp,
message_iterator=message_iterator,
assignment=assignment,
backoff=self._prefetch_backoff,
fetch_offset=fetch_offset,
loop=self._loop)
# We added at least 1 successful record
needs_wakeup = True
elif records.size_in_bytes() > 0:
# we did not read a single message from a non-empty
# buffer because that message's size is larger than
# fetch size, in this case record this exception
err = RecordTooLargeError(
"There are some messages at [Partition=Offset]: "
"%s=%s whose size is larger than the fetch size %s"
" and hence cannot be ever returned. "
"Increase the fetch size, or decrease the maximum "
"message size the broker will allow.", tp,
fetch_offset, self._max_partition_fetch_bytes)
self._set_error(tp, err)
tp_state.consumed_to(tp_state.position + 1)
needs_wakeup = True
elif error_type in (Errors.NotLeaderForPartitionError,
Errors.UnknownTopicOrPartitionError):
self._client.force_metadata_update()
elif error_type is Errors.OffsetOutOfRangeError:
if self._default_reset_strategy != \
OffsetResetStrategy.NONE:
tp_state.await_reset(self._default_reset_strategy)
else:
err = Errors.OffsetOutOfRangeError({tp: fetch_offset})
self._set_error(tp, err)
needs_wakeup = True
log.info(
"Fetch offset %s is out of range for partition %s,"
" resetting offset", fetch_offset, tp)
elif error_type is Errors.TopicAuthorizationFailedError:
log.warning("Not authorized to read from topic %s.",
tp.topic)
err = Errors.TopicAuthorizationFailedError(tp.topic)
self._set_error(tp, err)
needs_wakeup = True
else:
log.warning('Unexpected error while fetching data: %s',
error_type.__name__)
return needs_wakeup
def commit_offsets(self, offsets):
"""Commit specific offsets asynchronously.
Arguments:
offsets (dict {TopicPartition: OffsetAndMetadata}): what to commit
Raises error on failure
"""
self._subscription.needs_fetch_committed_offsets = True
if not offsets:
log.debug('No offsets to commit')
return True
if (yield from self.coordinator_unknown()):
raise Errors.GroupCoordinatorNotAvailableError()
node_id = self.coordinator_id
# create the offset commit request
offset_data = collections.defaultdict(list)
for tp, offset in offsets.items():
offset_data[tp.topic].append(
(tp.partition, offset.offset, offset.metadata))
request = OffsetCommitRequest(
self.group_id, self.generation, self.member_id,
OffsetCommitRequest.DEFAULT_RETENTION_TIME,
[(topic, tp_offsets) for topic, tp_offsets in offset_data.items()])
log.debug("Sending offset-commit request with %s for group %s to %s",
offsets, self.group_id, node_id)
response = yield from self._send_req(
node_id, request, group=ConnectionGroup.COORDINATION)
unauthorized_topics = set()
for topic, partitions in response.topics:
for partition, error_code in partitions:
tp = TopicPartition(topic, partition)
offset = offsets[tp]
error_type = Errors.for_code(error_code)
if error_type is Errors.NoError:
log.debug("Committed offset %s for partition %s", offset,
tp)
if self._subscription.is_assigned(tp):
partition = self._subscription.assignment[tp]
partition.committed = offset.offset
elif error_type is Errors.GroupAuthorizationFailedError:
log.error("OffsetCommit failed for group %s - %s",
self.group_id, error_type.__name__)
raise error_type()
elif error_type is Errors.TopicAuthorizationFailedError:
unauthorized_topics.add(topic)
elif error_type in (Errors.OffsetMetadataTooLargeError,
Errors.InvalidCommitOffsetSizeError):
# raise the error to the user
log.info(
"OffsetCommit failed for group %s on partition %s"
" due to %s, will retry", self.group_id, tp,
error_type.__name__)
raise error_type()
elif error_type is Errors.GroupLoadInProgressError:
# just retry
log.info(
"OffsetCommit failed for group %s because group is"
" initializing (%s), will retry", self.group_id,
error_type.__name__)
raise error_type()
elif error_type in (Errors.GroupCoordinatorNotAvailableError,
Errors.NotCoordinatorForGroupError,
Errors.RequestTimedOutError):
log.info(
"OffsetCommit failed for group %s due to a"
" coordinator error (%s), will find new coordinator"
" and retry", self.group_id, error_type.__name__)
self.coordinator_dead()
raise error_type()
elif error_type in (Errors.UnknownMemberIdError,
Errors.IllegalGenerationError,
Errors.RebalanceInProgressError):
# need to re-join group
error = error_type(self.group_id)
log.error(
"OffsetCommit failed for group %s due to group"
" error (%s), will rejoin", self.group_id, error)
self._subscription.mark_for_reassignment()
raise error
else:
log.error(
"OffsetCommit failed for group %s on partition %s"
" with offset %s: %s", self.group_id, tp, offset,
error_type.__name__)
raise error_type()
if unauthorized_topics:
log.error("OffsetCommit failed for unauthorized topics %s",
unauthorized_topics)
raise Errors.TopicAuthorizationFailedError(unauthorized_topics)
def _proc_fetch_request(self, node_id, request):
needs_wakeup = False
needs_position_update = []
try:
response = yield from self._client.send(node_id, request)
except Errors.KafkaError as err:
log.error("Failed fetch messages from %s: %s", node_id, err)
return False
finally:
self._in_flight.remove(node_id)
fetch_offsets = {}
for topic, partitions in request.topics:
for partition, offset, _ in partitions:
fetch_offsets[TopicPartition(topic, partition)] = offset
for topic, partitions in response.topics:
for partition, error_code, highwater, raw_batch in partitions:
tp = TopicPartition(topic, partition)
error_type = Errors.for_code(error_code)
if not self._subscriptions.is_fetchable(tp):
# this can happen when a rebalance happened
log.debug(
"Ignoring fetched records for partition %s"
" since it is no longer fetchable", tp)
elif error_type is Errors.NoError:
tp_assignment = self._subscriptions.assignment[tp]
tp_assignment.highwater = highwater
# `drop_pending_message_set` is set after a seek to another
# position. If we request the *new* position we have to
# drop this flag, so we catch future seek's.
fetch_offset = fetch_offsets[tp]
if fetch_offset == tp_assignment.position:
tp_assignment.drop_pending_message_set = False
records = MemoryRecords(raw_batch)
if records.has_next():
log.debug(
"Adding fetched record for partition %s with"
" offset %d to buffered record list", tp,
fetch_offset)
message_iterator = self._unpack_records(tp, records)
self._records[tp] = FetchResult(
tp,
records=message_iterator,
subscriptions=self._subscriptions,
backoff=self._prefetch_backoff,
loop=self._loop)
# We added at least 1 successful record
needs_wakeup = True
elif records.size_in_bytes() > 0:
# we did not read a single message from a non-empty
# buffer because that message's size is larger than
# fetch size, in this case record this exception
err = RecordTooLargeError(
"There are some messages at [Partition=Offset]: "
"%s=%s whose size is larger than the fetch size %s"
" and hence cannot be ever returned. "
"Increase the fetch size, or decrease the maximum "
"message size the broker will allow.", tp,
fetch_offset, self._max_partition_fetch_bytes)
self._set_error(tp, err)
needs_wakeup = True
self._subscriptions.assignment[tp].position += 1
elif error_type in (Errors.NotLeaderForPartitionError,
Errors.UnknownTopicOrPartitionError):
self._client.force_metadata_update()
elif error_type is Errors.OffsetOutOfRangeError:
fetch_offset = fetch_offsets[tp]
if self._subscriptions.has_default_offset_reset_policy():
self._subscriptions.need_offset_reset(tp)
needs_position_update.append(tp)
else:
err = Errors.OffsetOutOfRangeError({tp: fetch_offset})
self._set_error(tp, err)
needs_wakeup = True
log.info(
"Fetch offset %s is out of range for partition %s,"
" resetting offset", fetch_offset, tp)
elif error_type is Errors.TopicAuthorizationFailedError:
log.warn("Not authorized to read from topic %s.", tp.topic)
err = Errors.TopicAuthorizationFailedError(tp.topic)
self._set_error(tp, err)
needs_wakeup = True
else:
log.warn('Unexpected error while fetching data: %s',
error_type.__name__)
if needs_position_update:
try:
yield from self.update_fetch_positions(needs_position_update)
except Exception: # pragma: no cover
log.error("Unexpected error updating fetch positions",
exc_info=True)
return needs_wakeup
