Kafka sink connector

The Kafka sink connector pulls messages from Pulsar topics and persists the messages to Kafka topics.

This guide explains how to configure and use the Kafka sink connector.

Configuration

The configuration of the Kafka sink connector has the following parameters.

Property

Name	Type	Required	Default	Description
bootstrapServers	String	true	" " (empty string)	A comma-separated list of host and port pairs for establishing the initial connection to the Kafka cluster.
securityProtocol	String	false	" " (empty string)	The protocol used to communicate with Kafka brokers.
saslMechanism	String	false	" " (empty string)	The SASL mechanism used for Kafka client connections.
saslJaasConfig	String	false	" " (empty string)	The JAAS login context parameters for SASL connections in the format used by JAAS configuration files.
sslEnabledProtocols	String	false	" " (empty string)	The list of protocols enabled for SSL connections.
sslEndpointIdentificationAlgorithm	String	false	" " (empty string)	The endpoint identification algorithm to validate server hostnames using a server certificate.
sslTruststoreLocation	String	false	" " (empty string)	The location of the trust store file.
sslTruststorePassword	String	false	" " (empty string)	The password of the trust store file.
acks	String	true	" " (empty string)	The number of acknowledgments that the producer requires the leader to receive before a request completes. This controls the durability of the sent records.
batchsize	long	false	16384L	The batch size that a Kafka producer attempts to batch records together before sending them to brokers.
maxRequestSize	long	false	1048576L	The maximum size of a Kafka request in bytes.
topic	String	true	" " (empty string)	The Kafka topic which receives messages from Pulsar.
keyDeserializationClass	String	false	org.apache.kafka.common.serialization.StringSerializer	The serializer class for Kafka producers to serialize keys.
valueDeserializationClass	String	false	org.apache.kafka.common.serialization.ByteArraySerializer	The serializer class for Kafka producers to serialize values. The serializer is set by a specific implementation of KafkaAbstractSink.
producerConfigProperties	Map	false	" " (empty string)	The producer configuration properties to be passed to producers. Note: other properties specified in the connector configuration file take precedence over this configuration.

Example

Before using the Kafka sink connector, you need to create a configuration file through one of the following methods.

• JSON

  {
     "configs": {
        "bootstrapServers": "localhost:6667",
        "topic": "test",
        "acks": "1",
        "batchSize": "16384",
        "maxRequestSize": "1048576",
        "producerConfigProperties": {
           "client.id": "test-pulsar-producer",
           "security.protocol": "SASL_PLAINTEXT",
           "sasl.mechanism": "GSSAPI",
           "sasl.kerberos.service.name": "kafka",
           "acks": "all"
        }
     }
  }

• YAML

  configs:
      bootstrapServers: "localhost:6667"
      topic: "test"
      acks: "1"
      batchSize: "16384"
      maxRequestSize: "1048576"
      producerConfigProperties:
          client.id: "test-pulsar-producer"
          security.protocol: "SASL_PLAINTEXT"
          sasl.mechanism: "GSSAPI"
          sasl.kerberos.service.name: "kafka"
          acks: "all"