[GitHub] [beam] kennknowles opened a new issue, #18059: StateNamespaces.window() potentially unstable / stable encodings for windows

[GitBox <gi...@apache.org>]

kennknowles opened a new issue, #18059:
URL: https://github.com/apache/beam/issues/18059

   WindowNamespace#stringKey includes a base64 encoding of the window as encoded by the windowCoder. This makes the key unpredictable if we support features such as reloading a pipeline with a new SDK or bugfixed pipeline. The encoding should be stable and documented.
   
   And even if the SDK's window types are stable and documented, users can define their own windows with coders and these may be less stable / requiring bugfixes. This ticket is to track the issue and any new ideas.
   
   [1] https://github.com/apache/incubator-beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/util/state/StateNamespaces.java#L113
   
   Imported from Jira [BEAM-652](https://issues.apache.org/jira/browse/BEAM-652). Original Jira may contain additional context.
   Reported by: kenn.


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