def wait_for_kafka_topic(hostport, topic, timeout=60): """Wait for a Kafka topic to become available.""" # Delay import to facilitate module use in limited virtualenvs. from kafka import SimpleClient, TopicPartition start = time.time() client = SimpleClient(hostport, client_id=b'dummy', timeout=1) while not client.has_metadata_for_topic(topic): if time.time() - start > timeout: raise Exception('timeout reached waiting for topic') time.sleep(0.1) client.load_metadata_for_topics() # And wait for all partitions in that topic to have a leader. while True: tps = [ TopicPartition(topic, p) for p in client.topic_partitions.get(topic, []) ] if tps and all(client.topics_to_brokers.get(tp) for tp in tps): break if time.time() - start > timeout: raise Exception('timeout reached waiting for topic brokers') time.sleep(0.1) client.load_metadata_for_topics()
class MyKafkaClient: def __init__(self): self.client = SimpleClient(DEFAULT_HOSTS) def call_back(self, topic, partition): payload = ProduceRequestPayload(topic=topic, partition=partition, messages=[create_message('test call')]) retries = 5 reps = [] while retries and not reps: retries -= 1 try: reps = self.client.send_produce_request(payloads=[payload], fail_on_error=True) except LeaderNotAvailableError: self.client.load_metadata_for_topics() time.sleep(1) return reps
def test_load_metadata(self, protocol, conn): mock_conn(conn) brokers = [ BrokerMetadata(0, 'broker_1', 4567, None), BrokerMetadata(1, 'broker_2', 5678, None) ] resp0_brokers = list(map(itemgetter(0, 1, 2), brokers)) topics = [ (NO_ERROR, 'topic_1', [ (NO_ERROR, 0, 1, [1, 2], [1, 2]) ]), (NO_ERROR, 'topic_noleader', [ (NO_LEADER, 0, -1, [], []), (NO_LEADER, 1, -1, [], []), ]), (NO_LEADER, 'topic_no_partitions', []), (UNKNOWN_TOPIC_OR_PARTITION, 'topic_unknown', []), (NO_ERROR, 'topic_3', [ (NO_ERROR, 0, 0, [0, 1], [0, 1]), (NO_ERROR, 1, 1, [1, 0], [1, 0]), (NO_ERROR, 2, 0, [0, 1], [0, 1]) ]) ] protocol.decode_metadata_response.return_value = MetadataResponse[0](resp0_brokers, topics) # client loads metadata at init client = SimpleClient(hosts=['broker_1:4567']) self.assertDictEqual({ TopicPartition('topic_1', 0): brokers[1], TopicPartition('topic_noleader', 0): None, TopicPartition('topic_noleader', 1): None, TopicPartition('topic_3', 0): brokers[0], TopicPartition('topic_3', 1): brokers[1], TopicPartition('topic_3', 2): brokers[0]}, client.topics_to_brokers) # if we ask for metadata explicitly, it should raise errors with self.assertRaises(LeaderNotAvailableError): client.load_metadata_for_topics('topic_no_partitions') with self.assertRaises(UnknownTopicOrPartitionError): client.load_metadata_for_topics('topic_unknown') # This should not raise client.load_metadata_for_topics('topic_no_leader')
def test_load_metadata(self, protocol, conn): mock_conn(conn) brokers = [ BrokerMetadata(0, 'broker_1', 4567, None), BrokerMetadata(1, 'broker_2', 5678, None) ] resp0_brokers = list(map(itemgetter(0, 1, 2), brokers)) topics = [ (NO_ERROR, 'topic_1', [ (NO_ERROR, 0, 1, [1, 2], [1, 2]) ]), (NO_ERROR, 'topic_noleader', [ (NO_LEADER, 0, -1, [], []), (NO_LEADER, 1, -1, [], []), ]), (NO_LEADER, 'topic_no_partitions', []), (UNKNOWN_TOPIC_OR_PARTITION, 'topic_unknown', []), (NO_ERROR, 'topic_3', [ (NO_ERROR, 0, 0, [0, 1], [0, 1]), (NO_ERROR, 1, 1, [1, 0], [1, 0]), (NO_ERROR, 2, 0, [0, 1], [0, 1]) ]) ] protocol.decode_metadata_response.return_value = MetadataResponse[0](resp0_brokers, topics) # client loads metadata at init client = SimpleClient(hosts=['broker_1:4567']) self.assertDictEqual({ TopicPartition('topic_1', 0): brokers[1], TopicPartition('topic_noleader', 0): None, TopicPartition('topic_noleader', 1): None, TopicPartition('topic_3', 0): brokers[0], TopicPartition('topic_3', 1): brokers[1], TopicPartition('topic_3', 2): brokers[0]}, client.topics_to_brokers) # if we ask for metadata explicitly, it should raise errors with self.assertRaises(LeaderNotAvailableError): client.load_metadata_for_topics('topic_no_partitions') with self.assertRaises(UnknownTopicOrPartitionError): client.load_metadata_for_topics('topic_unknown') # This should not raise client.load_metadata_for_topics('topic_no_leader')
class KafkaIntegrationTestCase(unittest.TestCase): create_client = True topic = None zk = None server = None def setUp(self): super(KafkaIntegrationTestCase, self).setUp() if not os.environ.get('KAFKA_VERSION'): self.skipTest('Integration test requires KAFKA_VERSION') if not self.topic: topic = "%s-%s" % (self.id()[self.id().rindex(".") + 1:], random_string(10)) self.topic = topic if self.create_client: self.client = SimpleClient('%s:%d' % (self.server.host, self.server.port)) timeout = time.time() + 30 while time.time() < timeout: try: self.client.load_metadata_for_topics(self.topic, ignore_leadernotavailable=False) if self.client.has_metadata_for_topic(topic): break except (LeaderNotAvailableError, InvalidTopicError): time.sleep(1) else: raise KafkaTimeoutError('Timeout loading topic metadata!') # Ensure topic partitions have been created on all brokers to avoid UnknownPartitionErrors # TODO: It might be a good idea to move this to self.client.ensure_topic_exists for partition in self.client.get_partition_ids_for_topic(self.topic): while True: try: req = OffsetRequestPayload(self.topic, partition, -1, 100) self.client.send_offset_request([req]) break except (NotLeaderForPartitionError, UnknownTopicOrPartitionError, FailedPayloadsError) as e: if time.time() > timeout: raise KafkaTimeoutError('Timeout loading topic metadata!') time.sleep(.1) self._messages = {} def tearDown(self): super(KafkaIntegrationTestCase, self).tearDown() if not os.environ.get('KAFKA_VERSION'): return if self.create_client: self.client.close() def current_offset(self, topic, partition): try: offsets, = self.client.send_offset_request([OffsetRequestPayload(topic, partition, -1, 1)]) except Exception: # XXX: We've seen some UnknownErrors here and can't debug w/o server logs self.zk.child.dump_logs() self.server.child.dump_logs() raise else: return offsets.offsets[0] def msgs(self, iterable): return [self.msg(x) for x in iterable] def msg(self, s): if s not in self._messages: self._messages[s] = '%s-%s-%s' % (s, self.id(), str(uuid.uuid4())) return self._messages[s].encode('utf-8') def key(self, k): return k.encode('utf-8')
class KafkaIntegrationTestCase(unittest.TestCase): create_client = True topic = None zk = None server = None def setUp(self): super(KafkaIntegrationTestCase, self).setUp() if not os.environ.get('KAFKA_VERSION'): self.skipTest('Integration test requires KAFKA_VERSION') if not self.topic: topic = "%s-%s" % (self.id()[self.id().rindex(".") + 1:], random_string(10)) self.topic = topic if self.create_client: self.client = SimpleClient('%s:%d' % (self.server.host, self.server.port)) timeout = time.time() + 30 while time.time() < timeout: try: self.client.load_metadata_for_topics( self.topic, ignore_leadernotavailable=False) if self.client.has_metadata_for_topic(topic): break except (LeaderNotAvailableError, InvalidTopicError): time.sleep(1) else: raise KafkaTimeoutError('Timeout loading topic metadata!') # Ensure topic partitions have been created on all brokers to avoid UnknownPartitionErrors # TODO: It might be a good idea to move this to self.client.ensure_topic_exists for partition in self.client.get_partition_ids_for_topic(self.topic): while True: try: req = OffsetRequestPayload(self.topic, partition, -1, 100) self.client.send_offset_request([req]) break except (NotLeaderForPartitionError, UnknownTopicOrPartitionError, FailedPayloadsError) as e: if time.time() > timeout: raise KafkaTimeoutError( 'Timeout loading topic metadata!') time.sleep(.1) self._messages = {} def tearDown(self): super(KafkaIntegrationTestCase, self).tearDown() if not os.environ.get('KAFKA_VERSION'): return if self.create_client: self.client.close() def current_offset(self, topic, partition): try: offsets, = self.client.send_offset_request( [OffsetRequestPayload(topic, partition, -1, 1)]) except Exception: # XXX: We've seen some UnknownErrors here and can't debug w/o server logs self.zk.child.dump_logs() self.server.child.dump_logs() raise else: return offsets.offsets[0] def msgs(self, iterable): return [self.msg(x) for x in iterable] def msg(self, s): if s not in self._messages: self._messages[s] = '%s-%s-%s' % (s, self.id(), str(uuid.uuid4())) return self._messages[s].encode('utf-8') def key(self, k): return k.encode('utf-8')