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https://issues.apache.org/jira/browse/FLINK-21138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17272393#comment-17272393
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Maciej Prochniak commented on FLINK-21138:
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Hi [~trohrmann], thanks for quick response.
I attach smallest case I could come up with, and stack trace that is thrown.
I think the problem is relatively straightforward and user classloader just
needs to be passed down to KvStateEntry. I think I can prepare a PR, but I'm
not quite sure what kind of test would be suitable - as the problem involves
custom classloaders etc.
> KvStateServerHandler is not invoked with user code classloader
> --------------------------------------------------------------
>
> Key: FLINK-21138
> URL: https://issues.apache.org/jira/browse/FLINK-21138
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Queryable State
> Affects Versions: 1.11.2
> Reporter: Maciej Prochniak
> Priority: Major
> Attachments: TestJob.java, stacktrace
>
>
> When using e.g. custom Kryo serializers user code classloader has to be set
> as context classloader during invocation of methods such as
> TypeSerializer.duplicat()
> KvStateServerHandler does not do this, which leads to exceptions like
> ClassNotFound etc.
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