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https://issues.apache.org/jira/browse/BEAM-8157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maximilian Michels updated BEAM-8157:
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Status: Open (was: Triage Needed)
> Key encoding for state requests is not consistent across SDKs
> -------------------------------------------------------------
>
> Key: BEAM-8157
> URL: https://issues.apache.org/jira/browse/BEAM-8157
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.13.0
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Priority: Critical
> Fix For: 2.17.0
>
> Time Spent: 6.5h
> Remaining Estimate: 0h
>
> The Flink runner requires the internal key to be encoded without a length
> prefix (OUTER context). The user state request handler exposes a serialized
> version of the key to the Runner. This key is encoded with the NESTED context
> which may add a length prefix. We need to convert it to OUTER context to
> match the Flink runner's key encoding.
> So far this has not caused the Flink Runner to behave incorrectly. However,
> with the upcoming support for Flink 1.9, the state backend will not accept
> requests for keys not part of any key group/partition of the operator. This
> is very likely to happen with the encoding not being consistent.
> **NOTE** This is only applicable to the Java SDK, as the Python SDK uses
> OUTER encoding for the key in state requests.
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