CODEWITHSUNDEEP
scalaapache-sparkintellij-ideartti
absmiths
absmiths

Reputation: 1174

Spark 2.x scala 2.1.1 custom encoder class type mismatch

I am using this code to define an encoder for spark 2.x, in scala 2.1.1:

import org.apache.spark.sql.Encoder
import org.apache.spark.sql.types.StructType

class LogProcessorMessageEncoder extends Encoder[LogProcessorMessage] {
    override def schema: StructType = null

    override def clsTag: Class[LogProcessorMessage] = classOf[LogProcessorMessage]
}

object LogProcessorMessage {}

class LogProcessorMessage extends Serializable {}

And IntelliJ says it is fine, but the override of the clsTag method results in a compiler error:

Error:(20, 15) overriding method clsTag in trait Encoder of type => scala.reflect.ClassTag[dvn.aast.telemetry.scala.stream.LogProcessorMessage];
method clsTag has incompatible type
override def clsTag: Class[LogProcessorMessage] = classOf[LogProcessorMessage]

Upvotes: 0

Views: 412

Answers (1)

user8820838
user8820838

Reputation: 61

clsTag has to be ClassTag not Class:

class LogProcessorMessageEncoder extends Encoder[LogProcessorMessage] {
  override def clsTag: ClassTag[LogProcessorMessage] = ClassTag(classOf[LogProcessorMessage])
  override def schema: StructType = null 
}

Upvotes: 1

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