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https://issues.apache.org/jira/browse/FLINK-4721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17321712#comment-17321712
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Flink Jira Bot commented on FLINK-4721:
---------------------------------------
This issue and all of its Sub-Tasks have not been updated for 180 days. So, it
has been labeled "stale-minor". If you are still affected by this bug or are
still interested in this issue, please give an update and remove the label. In
7 days the issue will be closed automatically.
> Getting exception when using a key of type Option[String] in distinct
> operation
> -------------------------------------------------------------------------------
>
> Key: FLINK-4721
> URL: https://issues.apache.org/jira/browse/FLINK-4721
> Project: Flink
> Issue Type: Bug
> Components: API / Scala, API / Type Serialization System
> Affects Versions: 1.1.2
> Reporter: Ashish Walia
> Priority: Minor
> Labels: stale-minor
>
> Selecting distinct records from the input dataset where one of the keys is
> Option[String] and it's value being None most of the times is leading to this
> exception :-
> Exception in thread "main" java.lang.RuntimeException: Comparator
> org.apache.flink.api.scala.typeutils.OptionTypeComparator specifies an
> invalid length for the normalized key: -2147483648
> at
> org.apache.flink.api.java.typeutils.runtime.PojoComparator.<init>(PojoComparator.java:95)
> at
> org.apache.flink.api.java.typeutils.PojoTypeInfo$PojoTypeComparatorBuilder.createTypeComparator(PojoTypeInfo.java:400)
> at
> org.apache.flink.api.common.typeutils.CompositeType.createComparator(CompositeType.java:167)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.createComparator(JavaApiPostPass.java:293)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.traverse(JavaApiPostPass.java:169)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.traverseChannel(JavaApiPostPass.java:267)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.traverse(JavaApiPostPass.java:173)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.traverseChannel(JavaApiPostPass.java:267)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.traverse(JavaApiPostPass.java:97)
> at
> org.apache.flink.optimizer.postpass.JavaApiPostPass.postPass(JavaApiPostPass.java:81)
> at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:521)
> at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:398)
> at
> org.apache.flink.client.LocalExecutor.executePlan(LocalExecutor.java:185)
> at
> org.apache.flink.api.java.LocalEnvironment.execute(LocalEnvironment.java:91)
> at
> org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:651)
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