[jira] [Updated] (FLINK-23035) Add explicit method to StateChangelogWriter to write metadata

["Roman Khachatryan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-23035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Khachatryan updated FLINK-23035:
--------------------------------------
        Parent:     (was: FLINK-21352)
    Issue Type: Technical Debt  (was: Sub-task)

> Add explicit method to StateChangelogWriter to write metadata
> -------------------------------------------------------------
>
>                 Key: FLINK-23035
>                 URL: https://issues.apache.org/jira/browse/FLINK-23035
>             Project: Flink
>          Issue Type: Technical Debt
>          Components: Runtime / State Backends
>            Reporter: Roman Khachatryan
>            Priority: Minor
>             Fix For: 1.15.0
>
>
> Currently, metadata is written to the state changelog using the same StateChangelogWriter.append() method as data.
> However, it doesn't belong to a specific group, and should be read first on recovery. Because of that, -1 is used.
> An explicit append() without keygroup would be less fragile (probably still using -1 under the hood).



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