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https://issues.apache.org/jira/browse/FLINK-36903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910074#comment-17910074
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Zhanghao Chen commented on FLINK-36903:
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Adding a switch turned out to be difficult: the type extractor class is a
static utils class, which means we can only set a static vaiable to
parameterize its behavior, but this may also break when the same JVM is reused
to submit multiple jobs. Therefore, it's better to just break
state-comaptiblity as it is, and rely on the state migration tool to do the
work. Closing this issue.
> Flink 2.0: Add switch for built-in serialization support for common
> collection types
> ------------------------------------------------------------------------------------
>
> Key: FLINK-36903
> URL: https://issues.apache.org/jira/browse/FLINK-36903
> Project: Flink
> Issue Type: Sub-task
> Components: API / Type Serialization System
> Affects Versions: 2.0.0
> Reporter: Zhanghao Chen
> Priority: Major
>
> Built-in serialization support for common collection types will break
> state-comaptiblity, adding a switch for it can help migrating from an older
> version.
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