Java Code Examples for kafka.javaapi.TopicMetadata#errorCode()

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Example 1

Source File: KafkaValidationUtil08.java From datacollector with Apache License 2.0

5 votes

@Override
public int getPartitionCount(
    String metadataBrokerList,
    String topic,
    Map<String, Object> kafkaClientConfigs,
    int messageSendMaxRetries,
    long retryBackoffMs
) throws StageException {
  List<HostAndPort> kafkaBrokers = getKafkaBrokers(metadataBrokerList);
  TopicMetadata topicMetadata;
  try {
    topicMetadata = KafkaValidationUtil08.getTopicMetadata(
        kafkaBrokers,
        topic,
        messageSendMaxRetries,
        retryBackoffMs
    );
    if (topicMetadata == null) {
      // Could not get topic metadata from any of the supplied brokers
      throw new StageException(KafkaErrors.KAFKA_03, topic, metadataBrokerList);
    }
    if (topicMetadata.errorCode() == ErrorMapping.UnknownTopicOrPartitionCode()) {
      // Topic does not exist
      throw new StageException(KafkaErrors.KAFKA_04, topic);
    }
    if (topicMetadata.errorCode() != 0) {
      // Topic metadata returned error code other than ErrorMapping.UnknownTopicOrPartitionCode()
      throw new StageException(KafkaErrors.KAFKA_03, topic, metadataBrokerList);
    }
  } catch (IOException e) {
    LOG.error(KafkaErrors.KAFKA_11.getMessage(), topic, kafkaBrokers, e.toString(), e);
    throw new StageException(KafkaErrors.KAFKA_11, topic, kafkaBrokers, e.toString());
  }
  return topicMetadata.partitionsMetadata().size();
}

Example 2

Source File: Kafka08PartitionDiscoverer.java From Flink-CEPplus with Apache License 2.0

4 votes

@Override
protected List<String> getAllTopics() {
	List<String> topics = new LinkedList<>();

	retryLoop: for (int retry = 0; retry < numRetries; retry++) {
		brokersLoop: for (int arrIdx = 0; arrIdx < seedBrokerAddresses.length; arrIdx++) {
			LOG.info("Trying to get topic metadata from broker {} in try {}/{}", seedBrokerAddresses[currentContactSeedBrokerIndex], retry, numRetries);

			try {
				// clear in case we have an incomplete list from previous tries
				topics.clear();

				for (TopicMetadata item : consumer.send(new TopicMetadataRequest(Collections.<String>emptyList())).topicsMetadata()) {
					if (item.errorCode() != ErrorMapping.NoError()) {
						// warn and try more brokers
						LOG.warn("Error while getting metadata from broker {} to find partitions for {}. Error: {}.",
							seedBrokerAddresses[currentContactSeedBrokerIndex], topics.toString(), ErrorMapping.exceptionFor(item.errorCode()).getMessage());

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					topics.add(item.topic());
				}
				break retryLoop; // leave the loop through the brokers
			}
			catch (Exception e) {
				//validates seed brokers in case of a ClosedChannelException
				validateSeedBrokers(seedBrokerAddresses, e);
				LOG.warn("Error communicating with broker {} to find partitions for {}. {} Message: {}",
					seedBrokerAddresses[currentContactSeedBrokerIndex], topics, e.getClass().getName(), e.getMessage());
				LOG.debug("Detailed trace", e);

				// we sleep a bit. Retrying immediately doesn't make sense in cases where Kafka is reorganizing the leader metadata
				try {
					Thread.sleep(500);
				} catch (InterruptedException e1) {
					// sleep shorter.
				}

				useNextAddressAsNewContactSeedBroker();
			}
		} // brokers loop
	} // retries loop

	return topics;
}

Example 3

Source File: Kafka08PartitionDiscoverer.java From Flink-CEPplus with Apache License 2.0

4 votes

/**
 * Send request to Kafka to get partitions for topics.
 *
 * @param topics The name of the topics.
 */
public List<KafkaTopicPartitionLeader> getPartitionLeadersForTopics(List<String> topics) {
	List<KafkaTopicPartitionLeader> partitions = new LinkedList<>();

	retryLoop: for (int retry = 0; retry < numRetries; retry++) {
		brokersLoop: for (int arrIdx = 0; arrIdx < seedBrokerAddresses.length; arrIdx++) {
			LOG.info("Trying to get topic metadata from broker {} in try {}/{}", seedBrokerAddresses[currentContactSeedBrokerIndex], retry, numRetries);

			try {
				// clear in case we have an incomplete list from previous tries
				partitions.clear();

				for (TopicMetadata item : consumer.send(new TopicMetadataRequest(topics)).topicsMetadata()) {
					if (item.errorCode() != ErrorMapping.NoError()) {
						// warn and try more brokers
						LOG.warn("Error while getting metadata from broker {} to find partitions for {}. Error: {}.",
							seedBrokerAddresses[currentContactSeedBrokerIndex], topics.toString(), ErrorMapping.exceptionFor(item.errorCode()).getMessage());

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					if (!topics.contains(item.topic())) {
						LOG.warn("Received metadata from topic " + item.topic() + " even though it was not requested. Skipping ...");

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					for (PartitionMetadata part : item.partitionsMetadata()) {
						Node leader = brokerToNode(part.leader());
						KafkaTopicPartition ktp = new KafkaTopicPartition(item.topic(), part.partitionId());
						KafkaTopicPartitionLeader pInfo = new KafkaTopicPartitionLeader(ktp, leader);
						partitions.add(pInfo);
					}
				}
				break retryLoop; // leave the loop through the brokers
			}
			catch (Exception e) {
				//validates seed brokers in case of a ClosedChannelException
				validateSeedBrokers(seedBrokerAddresses, e);
				LOG.warn("Error communicating with broker {} to find partitions for {}. {} Message: {}",
					seedBrokerAddresses[currentContactSeedBrokerIndex], topics, e.getClass().getName(), e.getMessage());
				LOG.debug("Detailed trace", e);

				// we sleep a bit. Retrying immediately doesn't make sense in cases where Kafka is reorganizing the leader metadata
				try {
					Thread.sleep(500);
				} catch (InterruptedException e1) {
					// sleep shorter.
				}

				useNextAddressAsNewContactSeedBroker();
			}
		} // brokers loop
	} // retries loop

	return partitions;
}

Example 4

Source File: Kafka08PartitionDiscoverer.java From flink with Apache License 2.0

4 votes

@Override
protected List<String> getAllTopics() {
	List<String> topics = new LinkedList<>();

	retryLoop: for (int retry = 0; retry < numRetries; retry++) {
		brokersLoop: for (int arrIdx = 0; arrIdx < seedBrokerAddresses.length; arrIdx++) {
			LOG.info("Trying to get topic metadata from broker {} in try {}/{}", seedBrokerAddresses[currentContactSeedBrokerIndex], retry, numRetries);

			try {
				// clear in case we have an incomplete list from previous tries
				topics.clear();

				for (TopicMetadata item : consumer.send(new TopicMetadataRequest(Collections.<String>emptyList())).topicsMetadata()) {
					if (item.errorCode() != ErrorMapping.NoError()) {
						// warn and try more brokers
						LOG.warn("Error while getting metadata from broker {} to find partitions for {}. Error: {}.",
							seedBrokerAddresses[currentContactSeedBrokerIndex], topics.toString(), ErrorMapping.exceptionFor(item.errorCode()).getMessage());

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					topics.add(item.topic());
				}
				break retryLoop; // leave the loop through the brokers
			}
			catch (Exception e) {
				//validates seed brokers in case of a ClosedChannelException
				validateSeedBrokers(seedBrokerAddresses, e);
				LOG.warn("Error communicating with broker {} to find partitions for {}. {} Message: {}",
					seedBrokerAddresses[currentContactSeedBrokerIndex], topics, e.getClass().getName(), e.getMessage());
				LOG.debug("Detailed trace", e);

				// we sleep a bit. Retrying immediately doesn't make sense in cases where Kafka is reorganizing the leader metadata
				try {
					Thread.sleep(500);
				} catch (InterruptedException e1) {
					// sleep shorter.
				}

				useNextAddressAsNewContactSeedBroker();
			}
		} // brokers loop
	} // retries loop

	return topics;
}

Example 5

Source File: Kafka08PartitionDiscoverer.java From flink with Apache License 2.0

4 votes

/**
 * Send request to Kafka to get partitions for topics.
 *
 * @param topics The name of the topics.
 */
public List<KafkaTopicPartitionLeader> getPartitionLeadersForTopics(List<String> topics) {
	List<KafkaTopicPartitionLeader> partitions = new LinkedList<>();

	retryLoop: for (int retry = 0; retry < numRetries; retry++) {
		brokersLoop: for (int arrIdx = 0; arrIdx < seedBrokerAddresses.length; arrIdx++) {
			LOG.info("Trying to get topic metadata from broker {} in try {}/{}", seedBrokerAddresses[currentContactSeedBrokerIndex], retry, numRetries);

			try {
				// clear in case we have an incomplete list from previous tries
				partitions.clear();

				for (TopicMetadata item : consumer.send(new TopicMetadataRequest(topics)).topicsMetadata()) {
					if (item.errorCode() != ErrorMapping.NoError()) {
						// warn and try more brokers
						LOG.warn("Error while getting metadata from broker {} to find partitions for {}. Error: {}.",
							seedBrokerAddresses[currentContactSeedBrokerIndex], topics.toString(), ErrorMapping.exceptionFor(item.errorCode()).getMessage());

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					if (!topics.contains(item.topic())) {
						LOG.warn("Received metadata from topic " + item.topic() + " even though it was not requested. Skipping ...");

						useNextAddressAsNewContactSeedBroker();
						continue brokersLoop;
					}

					for (PartitionMetadata part : item.partitionsMetadata()) {
						Node leader = brokerToNode(part.leader());
						KafkaTopicPartition ktp = new KafkaTopicPartition(item.topic(), part.partitionId());
						KafkaTopicPartitionLeader pInfo = new KafkaTopicPartitionLeader(ktp, leader);
						partitions.add(pInfo);
					}
				}
				break retryLoop; // leave the loop through the brokers
			}
			catch (Exception e) {
				//validates seed brokers in case of a ClosedChannelException
				validateSeedBrokers(seedBrokerAddresses, e);
				LOG.warn("Error communicating with broker {} to find partitions for {}. {} Message: {}",
					seedBrokerAddresses[currentContactSeedBrokerIndex], topics, e.getClass().getName(), e.getMessage());
				LOG.debug("Detailed trace", e);

				// we sleep a bit. Retrying immediately doesn't make sense in cases where Kafka is reorganizing the leader metadata
				try {
					Thread.sleep(500);
				} catch (InterruptedException e1) {
					// sleep shorter.
				}

				useNextAddressAsNewContactSeedBroker();
			}
		} // brokers loop
	} // retries loop

	return partitions;
}

Example 6

Source File: KafkaValidationUtil08.java From datacollector with Apache License 2.0

4 votes

@Override
public boolean validateTopicExistence(
  Stage.Context context,
  String groupName,
  String configName,
  List<HostAndPort> kafkaBrokers,
  String metadataBrokerList,
  String topic,
  Map<String, Object> kafkaClientConfigs,
  List<Stage.ConfigIssue> issues,
  boolean producer
) {
  boolean valid = true;
  if(topic == null || topic.isEmpty()) {
    issues.add(context.createConfigIssue(groupName, configName, KafkaErrors.KAFKA_05));
    valid = false;
  } else {
    TopicMetadata topicMetadata;
    try {
      topicMetadata = KafkaValidationUtil08.getTopicMetadata(kafkaBrokers, topic, 1, 0);
      if(topicMetadata == null) {
        //Could not get topic metadata from any of the supplied brokers
        issues.add(
            context.createConfigIssue(
                groupName,
                KAFKA_CONFIG_BEAN_PREFIX + "topic",
                KafkaErrors.KAFKA_03,
                topic,
                metadataBrokerList
            )
        );
        valid = false;
      } else if (topicMetadata.errorCode() == ErrorMapping.UnknownTopicOrPartitionCode()) {
        //Topic does not exist
        issues.add(
            context.createConfigIssue(
                groupName,
                KAFKA_CONFIG_BEAN_PREFIX + "topic",
                KafkaErrors.KAFKA_04,
                topic
            )
        );
        valid = false;
      } else if (topicMetadata.errorCode() != 0) {
        // Topic metadata returned error code other than ErrorMapping.UnknownTopicOrPartitionCode()
        issues.add(
            context.createConfigIssue(
                groupName,
                KAFKA_CONFIG_BEAN_PREFIX + "topic",
                KafkaErrors.KAFKA_03,
                topic,
                metadataBrokerList
            )
        );
        valid = false;
      }
    } catch (IOException e) {
      //Could not connect to kafka with the given metadata broker list
      issues.add(
          context.createConfigIssue(
              groupName,
              KAFKA_CONFIG_BEAN_PREFIX + "metadataBrokerList",
              KafkaErrors.KAFKA_67,
              metadataBrokerList
          )
      );
      valid = false;
    }
  }
  return valid;
}

Example 7

Source File: KafkaStreamMetadataProvider.java From incubator-pinot with Apache License 2.0

4 votes

/**
 * Fetches the number of partitions for this kafka stream
 * @param timeoutMillis
 * @return
 */
@Override
public synchronized int fetchPartitionCount(long timeoutMillis) {
  int unknownTopicReplyCount = 0;
  final int MAX_UNKNOWN_TOPIC_REPLY_COUNT = 10;
  int kafkaErrorCount = 0;
  final int MAX_KAFKA_ERROR_COUNT = 10;

  final long endTime = System.currentTimeMillis() + timeoutMillis;

  while (System.currentTimeMillis() < endTime) {
    // Try to get into a state where we're connected to Kafka
    while (!_currentState.isConnectedToKafkaBroker() && System.currentTimeMillis() < endTime) {
      _currentState.process();
    }

    if (endTime <= System.currentTimeMillis() && !_currentState.isConnectedToKafkaBroker()) {
      throw new TimeoutException(
          "Failed to get the partition count for topic " + _topic + " within " + timeoutMillis + " ms");
    }

    // Send the metadata request to Kafka
    TopicMetadataResponse topicMetadataResponse = null;
    try {
      topicMetadataResponse = _simpleConsumer.send(new TopicMetadataRequest(Collections.singletonList(_topic)));
    } catch (Exception e) {
      _currentState.handleConsumerException(e);
      continue;
    }

    final TopicMetadata topicMetadata = topicMetadataResponse.topicsMetadata().get(0);
    final short errorCode = topicMetadata.errorCode();

    if (errorCode == Errors.NONE.code()) {
      return topicMetadata.partitionsMetadata().size();
    } else if (errorCode == Errors.LEADER_NOT_AVAILABLE.code()) {
      // If there is no leader, it'll take some time for a new leader to be elected, wait 100 ms before retrying
      Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
    } else if (errorCode == Errors.INVALID_TOPIC_EXCEPTION.code()) {
      throw new RuntimeException("Invalid topic name " + _topic);
    } else if (errorCode == Errors.UNKNOWN_TOPIC_OR_PARTITION.code()) {
      if (MAX_UNKNOWN_TOPIC_REPLY_COUNT < unknownTopicReplyCount) {
        throw new RuntimeException("Topic " + _topic + " does not exist");
      } else {
        // Kafka topic creation can sometimes take some time, so we'll retry after a little bit
        unknownTopicReplyCount++;
        Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
      }
    } else {
      // Retry after a short delay
      kafkaErrorCount++;

      if (MAX_KAFKA_ERROR_COUNT < kafkaErrorCount) {
        throw exceptionForKafkaErrorCode(errorCode);
      }

      Uninterruptibles.sleepUninterruptibly(100, TimeUnit.MILLISECONDS);
    }
  }

  throw new TimeoutException();
}