title: How to create partition using FieldPartitioner from Kafka S3 Sink Connector
body: <p>I am looking for the correct <strong>format</strong> to be applied to <code>s3-sink.properties</code> for Kafka S3 Sink Connector, using partition.class <a href="https://docs.confluent.io/current/connect/kafka-connect-s3/index.html#partitioning-records-into-s3-objects" rel="nofollow noreferrer">FieldPartitioner</a>. 
  I need to create <strong>3 partitions</strong> (one sub-partition of the other, like <em>field1=value/field2=value/field3=value</em>) based in Fields names from my kafka message.</p>
  
  <p>I really need an example here for the usage of <strong>partition.field.name</strong>. It receives a <strong>list</strong>, but I couldn't find an example yet.</p>
  
  <p>This is what I have so far and what I needed:</p>
  
  <pre><code>storage.class=io.confluent.connect.s3.storage.S3Storage
  format.class=io.confluent.connect.s3.format.parquet.ParquetFormat
  schema.generator.class=io.confluent.connect.storage.hive.schema.DefaultSchemaGenerator
  schema.compatibility=NONE
  partitioner.class=io.confluent.connect.storage.partitioner.FieldPartitioner
  partition.field.name=fieldName #Wrong so far, it can't even find my first one with this format. And I need two more, like: partition.field.name=field1,field2,field3
  </code></pre>
  
  <p>Thank you.</p>