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https://issues.apache.org/jira/browse/FLINK-9799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16540227#comment-16540227
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ASF GitHub Bot commented on FLINK-9799:
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GitHub user StefanRRichter opened a pull request:
https://github.com/apache/flink/pull/6308
[FLINK-9799] Generalize and unify state meta info snapshot
## What is the purpose of the change
This PR generalizes and unifies the de/serialization of state meta
information in backends. We replace the snapshots and reader/writers of the
individual state types with a general `StateMetaInfoSnapshot` and the
corresponding `StateMetaInfoSnapshotReadersWriters`. Backwards compatibility is
maintained.
## Verifying this change
This change is already covered by existing tests.
## 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: (no)
- 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)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StefanRRichter/flink
FLINK-9799-generalize-state-meta-pr
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/6308.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #6308
----
commit 5e44f759342793f4532e99f8df589c2416402176
Author: Stefan Richter <s.richter@...>
Date: 2018-07-11T09:11:11Z
[FLINK-9799][state] Generalize and unify state meta infos
----
> Generalize/unify state meta info
> --------------------------------
>
> Key: FLINK-9799
> URL: https://issues.apache.org/jira/browse/FLINK-9799
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Affects Versions: 1.5.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Labels: pull-request-available
>
> Flink currently has a couple of classes that describe the meta data of state
> (e.g. for keyed state, operator state, broadcast state, ...) and they
> typically come with their own serialization proxy and backwards compatibility
> story. However, the differences between those meta data classes are very
> small, like different option flags and a different set of serializers. Before
> introducing yet another meta data for timers, we should unify them in a
> general state meta data class.
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