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https://issues.apache.org/jira/browse/FLINK-10828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16686302#comment-16686302
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Stefan Richter commented on FLINK-10828:
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Interesting sidenode, it seems like the problem is going even further. I think
there is even a problem related to serializer duplication in the beam runner
for Flink:
https://issues.apache.org/jira/browse/BEAM-6055
> Enforce that all TypeSerializers are tested through SerializerTestBase
> ----------------------------------------------------------------------
>
> Key: FLINK-10828
> URL: https://issues.apache.org/jira/browse/FLINK-10828
> Project: Flink
> Issue Type: Test
> Components: Tests
> Reporter: Stefan Richter
> Priority: Major
> Fix For: 1.8.0
>
>
> As pointed out in FLINK-10827, type serializers are a common source of bugs
> and we should try to enforce that every type serializer (that is not
> exclusive to tests) is tested at least through a test that extends the
> {{SerializerTestBase}}. We should also check that the tests of composite
> serializers use inner serializers that are stateful and require proper
> duplication, or else the tests can pass even if inner serializers are not
> properly duplicated.
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