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https://issues.apache.org/jira/browse/FLINK-8522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16343580#comment-16343580
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Stefan Richter commented on FLINK-8522:
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Option 1 looks good for me.
> DefaultOperatorStateBackend writes data in checkpoint that is never read.
> -------------------------------------------------------------------------
>
> Key: FLINK-8522
> URL: https://issues.apache.org/jira/browse/FLINK-8522
> Project: Flink
> Issue Type: Bug
> Components: State Backends, Checkpointing
> Affects Versions: 1.4.0
> Reporter: Kostas Kloudas
> Assignee: Kostas Kloudas
> Priority: Major
> Fix For: 1.4.1
>
>
> In the DefaultOperatorStateBackend at line 283 we write in the checkpoint an
> int declaring the number of the operator states that we include in the
> checkpoint.
> This number is never read when restoring and this can lead to confusion and
> problems with backwards compatibility and/or extension of the types of state
> we support (e.g. broadcast state).
> There are two easy solutions, either remove the line and do not write the
> size, or make sure that we also read this number when restoring and simply
> ignore it.
> I would go for the first one, i.e. remove the line. What do you think
> [~richtesn] and [~tzulitai] ?
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