Provides a service to write records to a Kafka 2.x topic.


kafka, record, sink


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.

NameDefault ValueAllowable ValuesDescription
Kafka Brokerslocalhost:9092A comma-separated list of known Kafka Brokers in the format <host>:<port>
Supports Expression Language: true (will be evaluated using variable registry only)
Topic NameThe name of the Kafka Topic to publish to.
Supports Expression Language: true (will be evaluated using variable registry only)
Record WriterController Service API:
Implementations: FreeFormTextRecordSetWriter
Specifies the Controller Service to use for writing out the records.
Delivery Guarantee0
  • Best Effort Records are considered 'transmitted successfully' after successfully writing the content to a Kafka node, without waiting for a response. This provides the best performance but may result in data loss.
  • Guarantee Single Node Delivery Records are considered 'transmitted successfully' if the message is received by a single Kafka node, whether or not it is replicated. This is faster than <Guarantee Replicated Delivery> but can result in data loss if a Kafka node crashes.
  • Guarantee Replicated Delivery Records are considered 'transmitted unsuccessfully' unless the message is replicated to the appropriate number of Kafka Nodes according to the Topic configuration.
Specifies the requirement for guaranteeing that a message is sent to Kafka. Corresponds to Kafka's 'acks' property.
Message Header EncodingUTF-8For any attribute that is added as a message header, as configured via the <Attributes to Send as Headers> property, this property indicates the Character Encoding to use for serializing the headers.
Security ProtocolPLAINTEXT
Protocol used to communicate with brokers. Corresponds to Kafka's 'security.protocol' property.
Kerberos Credentials ServiceController Service API:
Implementation: KeytabCredentialsService
Specifies the Kerberos Credentials Controller Service that should be used for authenticating with Kerberos
Kerberos Service NameThe service name that matches the primary name of the Kafka server configured in the broker JAAS file.This can be defined either in Kafka's JAAS config or in Kafka's config. Corresponds to Kafka's 'security.protocol' property.It is ignored unless one of the SASL options of the <Security Protocol> are selected.
Supports Expression Language: true (will be evaluated using variable registry only)
SSL Context ServiceController Service API:
Implementations: StandardSSLContextService
Specifies the SSL Context Service to use for communicating with Kafka.
Max Request Size1 MBThe maximum size of a request in bytes. Corresponds to Kafka's 'max.request.size' property and defaults to 1 MB (1048576).
Acknowledgment Wait Time5 secsAfter sending a message to Kafka, this indicates the amount of time that we are willing to wait for a response from Kafka. If Kafka does not acknowledge the message within this time period, the FlowFile will be routed to 'failure'.
Max Metadata Wait Time5 secThe amount of time publisher will wait to obtain metadata or wait for the buffer to flush during the 'send' call before failing the entire 'send' call. Corresponds to Kafka's 'max.block.ms' property
Supports Expression Language: true (will be evaluated using variable registry only)
Compression Typenone
  • none
  • gzip
  • snappy
  • lz4
This parameter allows you to specify the compression codec for all data generated by this producer.

State management:

This component does not store state.


This component is not restricted.

System Resource Considerations:

None specified.