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https://issues.apache.org/jira/browse/FLINK-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012180#comment-15012180
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Gyula Fora commented on FLINK-3006:
-----------------------------------
Weird, I am having a hard time reproducing it as well. Give me some time on
this, as I am traveling until Saturday.
> TypeExtractor fails on custom type
> ----------------------------------
>
> Key: FLINK-3006
> URL: https://issues.apache.org/jira/browse/FLINK-3006
> Project: Flink
> Issue Type: Bug
> Components: Type Serialization System
> Affects Versions: 0.10.0, 1.0.0
> Reporter: Gyula Fora
>
> I get a weird error when I try to execute my job on the cluster. Locally this
> works fine but running it from the command line fails during typeextraction:
> input1.union(input2, input3).map(Either::<UserEvent, Long>
> Left).returns(eventOrLongType);
> The UserEvent type is a subclass of Tuple4<Long, Long, String, Boolean> with
> no extra fields. And the Either type is a regular pojo with 2 public nullable
> fields and a a default constructor.
> This fails when trying to extract the output type from the mapper, but I
> wouldnt actually care about that because I am providing my custom type
> implementation for this Either type.
> The error:
> org.apache.flink.client.program.ProgramInvocationException: The main method
> caused an error.
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:512)
> at
> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:395)
> at org.apache.flink.client.program.Client.runBlocking(Client.java:250)
> at
> org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:669)
> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:320)
> at
> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:971)
> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1021)
> Caused by: java.lang.ArrayIndexOutOfBoundsException: -1
> at java.util.ArrayList.elementData(ArrayList.java:418)
> at java.util.ArrayList.get(ArrayList.java:431)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.createTypeInfoFromInputs(TypeExtractor.java:599)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.createTypeInfoWithTypeHierarchy(TypeExtractor.java:493)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.analyzePojo(TypeExtractor.java:1392)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.privateGetForClass(TypeExtractor.java:1273)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.createTypeInfoWithTypeHierarchy(TypeExtractor.java:560)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.privateCreateTypeInfo(TypeExtractor.java:389)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.getUnaryOperatorReturnType(TypeExtractor.java:273)
> at
> org.apache.flink.api.java.typeutils.TypeExtractor.getMapReturnTypes(TypeExtractor.java:110)
> at
> org.apache.flink.streaming.api.datastream.DataStream.map(DataStream.java:550)
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