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https://issues.apache.org/jira/browse/FLINK-3617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15626474#comment-15626474
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ASF GitHub Bot commented on FLINK-3617:
---------------------------------------
Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2723
Yes, deepEquals() is a nice way to do this (and could be added to the
tests).
Still, no pull requests should ever change (especially weaken) any
unrelated tests. We need to enforce that policy.
> 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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