[jira] [Created] (FLINK-3617) NPE from CaseClassSerializer when dealing with null Option field

["Jamie Grier (JIRA)" <ji...@apache.org>]

Jamie Grier created FLINK-3617:
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             Summary: NPE from CaseClassSerializer when dealing with null Option field
                 Key: FLINK-3617
                 URL: https://issues.apache.org/jira/browse/FLINK-3617
             Project: Flink
          Issue Type: Bug
          Components: Core
    Affects Versions: 1.0.0
            Reporter: Jamie Grier


This error occurs when serializing a Scala case class with an field of Option[] type where the value is not Some or None, but null.

If this is not supported we should have a good error message.

java.lang.RuntimeException: ConsumerThread threw an exception: null
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09.run(FlinkKafkaConsumer09.java:336)
	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:78)
	at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:56)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:224)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:81)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:39)
	at org.apache.flink.streaming.api.operators.StreamSource$NonTimestampContext.collect(StreamSource.java:158)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer09$ConsumerThread.run(FlinkKafkaConsumer09.java:473)
Caused by: java.lang.NullPointerException
	at org.apache.flink.api.scala.typeutils.CaseClassSerializer.serialize(CaseClassSerializer.scala:100)
	at org.apache.flink.api.scala.typeutils.CaseClassSerializer.serialize(CaseClassSerializer.scala:30)
	at org.apache.flink.api.scala.typeutils.CaseClassSerializer.serialize(CaseClassSerializer.scala:100)
	at org.apache.flink.api.scala.typeutils.CaseClassSerializer.serialize(CaseClassSerializer.scala:30)
	at org.apache.flink.streaming.runtime.streamrecord.StreamRecordSerializer.serialize(StreamRecordSerializer.java:107)
	at org.apache.flink.streaming.runtime.streamrecord.StreamRecordSerializer.serialize(StreamRecordSerializer.java:42)
	at org.apache.flink.runtime.plugable.SerializationDelegate.write(SerializationDelegate.java:56)
	at org.apache.flink.runtime.io.network.api.serialization.SpanningRecordSerializer.addRecord(SpanningRecordSerializer.java:79)
	at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:84)
	at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:86)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:78)
	... 3 more



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