<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>PublishKafkaRecord_2_0</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">PublishKafkaRecord_2_0</h1><h2>Description: </h2><p>Sends the contents of a FlowFile as individual records to Apache Kafka using the Kafka 2.0 Producer API. The contents of the FlowFile are expected to be record-oriented data that can be read by the configured Record Reader. The complementary NiFi processor for fetching messages is ConsumeKafkaRecord_2_0.</p><p><a href="additionalDetails.html">Additional Details...</a></p><h3>Tags: </h3><p>Apache, Kafka, Record, csv, json, avro, logs, Put, Send, Message, PubSub, 2.0</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Display Name</th><th>API Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Kafka Brokers</strong></td><td>bootstrap.servers</td><td id="default-value">localhost:9092</td><td id="allowable-values"></td><td id="description">Comma-separated list of Kafka Brokers in the format host:port<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name"><strong>Topic Name</strong></td><td>topic</td><td></td><td id="allowable-values"></td><td id="description">The name of the Kafka Topic to publish to.<br/><strong>Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)</strong></td></tr><tr><td id="name"><strong>Record Reader</strong></td><td>record-reader</td><td></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>RecordReaderFactory<br/><strong>Implementations: </strong><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.grok.GrokReader/index.html">GrokReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.xml.XMLReader/index.html">XMLReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.avro.AvroReader/index.html">AvroReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.syslog.Syslog5424Reader/index.html">Syslog5424Reader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.cef.CEFReader/index.html">CEFReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.syslog.SyslogReader/index.html">SyslogReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.json.JsonTreeReader/index.html">JsonTreeReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.csv.CSVReader/index.html">CSVReader</a><br/><a href="../../../nifi-scripting-nar/1.19.1/org.apache.nifi.record.script.ScriptedReader/index.html">ScriptedReader</a><br/><a href="../../../nifi-parquet-nar/1.19.1/org.apache.nifi.parquet.ParquetReader/index.html">ParquetReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.json.JsonPathReader/index.html">JsonPathReader</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.lookup.ReaderLookup/index.html">ReaderLookup</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.windowsevent.WindowsEventLogReader/index.html">WindowsEventLogReader</a></td><td id="description">The Record Reader to use for incoming FlowFiles</td></tr><tr><td id="name"><strong>Record Writer</strong></td><td>record-writer</td><td></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>RecordSetWriterFactory<br/><strong>Implementations: </strong><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.text.FreeFormTextRecordSetWriter/index.html">FreeFormTextRecordSetWriter</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.avro.AvroRecordSetWriter/index.html">AvroRecordSetWriter</a><br/><a href="../../../nifi-scripting-nar/1.19.1/org.apache.nifi.record.script.ScriptedRecordSetWriter/index.html">ScriptedRecordSetWriter</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.csv.CSVRecordSetWriter/index.html">CSVRecordSetWriter</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.xml.XMLRecordSetWriter/index.html">XMLRecordSetWriter</a><br/><a href="../../../nifi-parquet-nar/1.19.1/org.apache.nifi.parquet.ParquetRecordSetWriter/index.html">ParquetRecordSetWriter</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.json.JsonRecordSetWriter/index.html">JsonRecordSetWriter</a><br/><a href="../../../nifi-record-serialization-services-nar/1.19.1/org.apache.nifi.lookup.RecordSetWriterLookup/index.html">RecordSetWriterLookup</a></td><td id="description">The Record Writer to use in order to serialize the data before sending to Kafka</td></tr><tr><td id="name"><strong>Use Transactions</strong></td><td>use-transactions</td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Specifies whether or not NiFi should provide Transactional guarantees when communicating with Kafka. If there is a problem sending data to Kafka, and this property is set to false, then the messages that have already been sent to Kafka will continue on and be delivered to consumers. If this is set to true, then the Kafka transaction will be rolled back so that those messages are not available to consumers. Setting this to true requires that the &lt;Delivery Guarantee&gt; property be set to "Guarantee Replicated Delivery."</td></tr><tr><td id="name"><strong>Failure Strategy</strong></td><td>Failure Strategy</td><td id="default-value">Route to Failure</td><td id="allowable-values"><ul><li>Route to Failure <img src="../../../../../html/images/iconInfo.png" alt="When unable to publish records to Kafka, the FlowFile will be routed to the failure relationship." title="When unable to publish records to Kafka, the FlowFile will be routed to the failure relationship."></img></li><li>Rollback <img src="../../../../../html/images/iconInfo.png" alt="When unable to publish records to Kafka, the FlowFile will be placed back on the queue so that it will be retried. For flows where FlowFile ordering is important, this strategy can be used along with ensuring that the each processor uses only a single Concurrent Task." title="When unable to publish records to Kafka, the FlowFile will be placed back on the queue so that it will be retried. For flows where FlowFile ordering is important, this strategy can be used along with ensuring that the each processor uses only a single Concurrent Task."></img></li></ul></td><td id="description">Specifies how the processor handles a FlowFile if it is unable to publish the data to Kafka</td></tr><tr><td id="name">Transactional Id Prefix</td><td>transactional-id-prefix</td><td></td><td id="allowable-values"></td><td id="description">When Use Transaction is set to true, KafkaProducer config 'transactional.id' will be a generated UUID and will be prefixed with this string.<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name"><strong>Delivery Guarantee</strong></td><td>acks</td><td id="default-value">Guarantee Replicated Delivery</td><td id="allowable-values"><ul><li>Best Effort <img src="../../../../../html/images/iconInfo.png" alt="FlowFile will be routed to success after successfully sending the content to a Kafka node, without waiting for any acknowledgment from the node at all. This provides the best performance but may result in data loss." title="FlowFile will be routed to success after successfully sending the content to a Kafka node, without waiting for any acknowledgment from the node at all. This provides the best performance but may result in data loss."></img></li><li>Guarantee Single Node Delivery <img src="../../../../../html/images/iconInfo.png" alt="FlowFile will be routed to success if the message is received by a single Kafka node, whether or not it is replicated. This is faster than &lt;Guarantee Replicated Delivery&gt; but can result in data loss if a Kafka node crashes" title="FlowFile will be routed to success if the message is received by a single Kafka node, whether or not it is replicated. This is faster than &lt;Guarantee Replicated Delivery&gt; but can result in data loss if a Kafka node crashes"></img></li><li>Guarantee Replicated Delivery <img src="../../../../../html/images/iconInfo.png" alt="FlowFile will be routed to failure unless the message is replicated to the appropriate number of Kafka Nodes according to the Topic configuration" title="FlowFile will be routed to failure unless the message is replicated to the appropriate number of Kafka Nodes according to the Topic configuration"></img></li></ul></td><td id="description">Specifies the requirement for guaranteeing that a message is sent to Kafka. Corresponds to Kafka's 'acks' property.</td></tr><tr><td id="name">Attributes to Send as Headers (Regex)</td><td>attribute-name-regex</td><td></td><td id="allowable-values"></td><td id="description">A Regular Expression that is matched against all FlowFile attribute names. Any attribute whose name matches the regex will be added to the Kafka messages as a Header. If not specified, no FlowFile attributes will be added as headers.</td></tr><tr><td id="name">Message Header Encoding</td><td>message-header-encoding</td><td id="default-value">UTF-8</td><td id="allowable-values"></td><td id="description">For any attribute that is added as a message header, as configured via the &lt;Attributes to Send as Headers&gt; property, this property indicates the Character Encoding to use for serializing the headers.</td></tr><tr><td id="name"><strong>Security Protocol</strong></td><td>security.protocol</td><td id="default-value">PLAINTEXT</td><td id="allowable-values"><ul><li>PLAINTEXT</li><li>SSL</li><li>SASL_PLAINTEXT</li><li>SASL_SSL</li></ul></td><td id="description">Security protocol used to communicate with brokers. Corresponds to Kafka Client security.protocol property</td></tr><tr><td id="name"><strong>SASL Mechanism</strong></td><td>sasl.mechanism</td><td id="default-value">GSSAPI</td><td id="allowable-values"><ul><li>GSSAPI <img src="../../../../../html/images/iconInfo.png" alt="General Security Services API for Kerberos authentication" title="General Security Services API for Kerberos authentication"></img></li><li>PLAIN <img src="../../../../../html/images/iconInfo.png" alt="Plain username and password authentication" title="Plain username and password authentication"></img></li><li>SCRAM-SHA-256 <img src="../../../../../html/images/iconInfo.png" alt="Salted Challenge Response Authentication Mechanism using SHA-512 with username and password" title="Salted Challenge Response Authentication Mechanism using SHA-512 with username and password"></img></li><li>SCRAM-SHA-512 <img src="../../../../../html/images/iconInfo.png" alt="Salted Challenge Response Authentication Mechanism using SHA-256 with username and password" title="Salted Challenge Response Authentication Mechanism using SHA-256 with username and password"></img></li></ul></td><td id="description">SASL mechanism used for authentication. Corresponds to Kafka Client sasl.mechanism property</td></tr><tr><td id="name">Kerberos Credentials Service</td><td>kerberos-credentials-service</td><td></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>KerberosCredentialsService<br/><strong>Implementation: </strong><a href="../../../nifi-kerberos-credentials-service-nar/1.19.1/org.apache.nifi.kerberos.KeytabCredentialsService/index.html">KeytabCredentialsService</a></td><td id="description">Service supporting generalized credentials authentication with Kerberos</td></tr><tr><td id="name">Kerberos Service Name</td><td>sasl.kerberos.service.name</td><td></td><td id="allowable-values"></td><td id="description">The service name that matches the primary name of the Kafka server configured in the broker JAAS configuration<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name">Kerberos Principal</td><td>sasl.kerberos.principal</td><td></td><td id="allowable-values"></td><td id="description">Principal used for authentication with Kerberos<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name">Kerberos Keytab</td><td>sasl.kerberos.keytab</td><td></td><td id="allowable-values"></td><td id="description">Keytab credentials used for authentication with Kerberos<br/><br/><strong>This property requires exactly one file to be provided..</strong><br/><br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name">Username</td><td>sasl.username</td><td></td><td id="allowable-values"></td><td id="description">Username provided with configured password when using PLAIN or SCRAM SASL Mechanisms<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong><br/><br/><strong>This Property is only considered if </strong><strong>the [SASL Mechanism] Property is set to one of the following values: [PLAIN], [SCRAM-SHA-512], [SCRAM-SHA-256]</strong></td></tr><tr><td id="name">Password</td><td>sasl.password</td><td></td><td id="allowable-values"></td><td id="description">Password provided with configured username when using PLAIN or SCRAM SASL Mechanisms<br/><strong>Sensitive Property: true</strong><br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong><br/><br/><strong>This Property is only considered if </strong><strong>the [SASL Mechanism] Property is set to one of the following values: [PLAIN], [SCRAM-SHA-512], [SCRAM-SHA-256]</strong></td></tr><tr><td id="name">Token Authentication</td><td>sasl.token.auth</td><td id="default-value">false</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Enables or disables Token authentication when using SCRAM SASL Mechanisms<br/><br/><strong>This Property is only considered if </strong><strong>the [SASL Mechanism] Property is set to one of the following values: [SCRAM-SHA-512], [SCRAM-SHA-256]</strong></td></tr><tr><td id="name">SSL Context Service</td><td>ssl.context.service</td><td></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>SSLContextService<br/><strong>Implementations: </strong><a href="../../../nifi-ssl-context-service-nar/1.19.1/org.apache.nifi.ssl.StandardRestrictedSSLContextService/index.html">StandardRestrictedSSLContextService</a><br/><a href="../../../nifi-ssl-context-service-nar/1.19.1/org.apache.nifi.ssl.StandardSSLContextService/index.html">StandardSSLContextService</a></td><td id="description">Service supporting SSL communication with Kafka brokers</td></tr><tr><td id="name">Message Key Field</td><td>message-key-field</td><td></td><td id="allowable-values"></td><td id="description">The name of a field in the Input Records that should be used as the Key for the Kafka message.<br/><strong>Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)</strong></td></tr><tr><td id="name"><strong>Max Request Size</strong></td><td>max.request.size</td><td id="default-value">1 MB</td><td id="allowable-values"></td><td id="description">The maximum size of a request in bytes. Corresponds to Kafka's 'max.request.size' property and defaults to 1 MB (1048576).</td></tr><tr><td id="name"><strong>Acknowledgment Wait Time</strong></td><td>ack.wait.time</td><td id="default-value">5 secs</td><td id="allowable-values"></td><td id="description">After 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'.</td></tr><tr><td id="name"><strong>Max Metadata Wait Time</strong></td><td>max.block.ms</td><td id="default-value">5 sec</td><td id="allowable-values"></td><td id="description">The 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<br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr><tr><td id="name">Partitioner class</td><td>partitioner.class</td><td id="default-value">DefaultPartitioner</td><td id="allowable-values"><ul><li>RoundRobinPartitioner <img src="../../../../../html/images/iconInfo.png" alt="Messages will be assigned partitions in a round-robin fashion, sending the first message to Partition 1, the next Partition to Partition 2, and so on, wrapping as necessary." title="Messages will be assigned partitions in a round-robin fashion, sending the first message to Partition 1, the next Partition to Partition 2, and so on, wrapping as necessary."></img></li><li>DefaultPartitioner <img src="../../../../../html/images/iconInfo.png" alt="Messages will be assigned to random partitions." title="Messages will be assigned to random partitions."></img></li><li>RecordPath Partitioner <img src="../../../../../html/images/iconInfo.png" alt="Interprets the &lt;Partition&gt; property as a RecordPath that will be evaluated against each Record to determine which partition the Record will go to. All Records that have the same value for the given RecordPath will go to the same Partition." title="Interprets the &lt;Partition&gt; property as a RecordPath that will be evaluated against each Record to determine which partition the Record will go to. All Records that have the same value for the given RecordPath will go to the same Partition."></img></li><li>Expression Language Partitioner <img src="../../../../../html/images/iconInfo.png" alt="Interprets the &lt;Partition&gt; property as Expression Language that will be evaluated against each FlowFile. This Expression will be evaluated once against the FlowFile, so all Records in a given FlowFile will go to the same partition." title="Interprets the &lt;Partition&gt; property as Expression Language that will be evaluated against each FlowFile. This Expression will be evaluated once against the FlowFile, so all Records in a given FlowFile will go to the same partition."></img></li></ul></td><td id="description">Specifies which class to use to compute a partition id for a message. Corresponds to Kafka's 'partitioner.class' property.</td></tr><tr><td id="name">Partition</td><td>partition</td><td></td><td id="allowable-values"></td><td id="description">Specifies which Partition Records will go to. How this value is interpreted is dictated by the &lt;Partitioner class&gt; property.<br/><strong>Supports Expression Language: true (will be evaluated using flow file attributes and variable registry)</strong></td></tr><tr><td id="name"><strong>Compression Type</strong></td><td>compression.type</td><td id="default-value">none</td><td id="allowable-values"><ul><li>none</li><li>gzip</li><li>snappy</li><li>lz4</li></ul></td><td id="description">This parameter allows you to specify the compression codec for all data generated by this producer.</td></tr></table><h3>Dynamic Properties: </h3><p>Supports Sensitive Dynamic Properties: <strong>No</strong></p><p>Dynamic Properties allow the user to specify both the name and value of a property.<table id="dynamic-properties"><tr><th>Name</th><th>Value</th><th>Description</th></tr><tr><td id="name">The name of a Kafka configuration property.</td><td id="value">The value of a given Kafka configuration property.</td><td>These properties will be added on the Kafka configuration after loading any provided configuration properties. In the event a dynamic property represents a property that was already set, its value will be ignored and WARN message logged. For the list of available Kafka properties please refer to: http://kafka.apache.org/documentation.html#configuration. <br/><strong>Supports Expression Language: true (will be evaluated using variable registry only)</strong></td></tr></table></p><h3>Relationships: </h3><table id="relationships"><tr><th>Name</th><th>Description</th></tr><tr><td>success</td><td>FlowFiles for which all content was sent to Kafka.</td></tr><tr><td>failure</td><td>Any FlowFile that cannot be sent to Kafka will be routed to this Relationship</td></tr></table><h3>Reads Attributes: </h3>None specified.<h3>Writes Attributes: </h3><table id="writes-attributes"><tr><th>Name</th><th>Description</th></tr><tr><td>msg.count</td><td>The number of messages that were sent to Kafka for this FlowFile. This attribute is added only to FlowFiles that are routed to success.</td></tr></table><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.<h3>Input requirement: </h3>This component requires an incoming relationship.<h3>System Resource Considerations:</h3>None specified.<h3>See Also:</h3><p><a href="../org.apache.nifi.processors.kafka.pubsub.PublishKafka_2_0/index.html">PublishKafka_2_0</a>, <a href="../org.apache.nifi.processors.kafka.pubsub.ConsumeKafka_2_0/index.html">ConsumeKafka_2_0</a>, <a href="../org.apache.nifi.processors.kafka.pubsub.ConsumeKafkaRecord_2_0/index.html">ConsumeKafkaRecord_2_0</a></p></body></html>