[GitHub] StefanRRichter opened a new pull request #6467: [FLINK-9887] Ensure serializer upgrades work with timer service remake

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

StefanRRichter opened a new pull request #6467: [FLINK-9887] Ensure serializer upgrades work with timer service remake
URL: https://github.com/apache/flink/pull/6467
 
 
   ## Brief change log
   
   This PR sits on top of #6438, so review only needs to consider commits starting from a9978de.
   
   Adds checks for serializer compatibility and ensures that the new serializer if propagated to the meta-data in all places where priority-queue state is created.
   
   ## Verifying this change
   
   Mainly by a test case added to `StateBackendTestBase`.
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (no)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
     - The serializers: (yes)
     - The runtime per-record code paths (performance sensitive): (no)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
     - If yes, how is the feature documented? (not applicable)
   

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