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[FLINK-24858][core] Prevent version mismatches in TypeSerializers #17755

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merged 1 commit into from
Nov 24, 2021

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@fapaul fapaul commented Nov 10, 2021

What is the purpose of the change

Before this commit, some serializers handled the version information
incorrectly in the corresponding serializer snapshot which could lead
during eager instantiation that the wrong version of the serializer
was used to deserialize the data.

Brief change log

  • Reenable serializer upgrade tests to always test serialization and restoration
  • Update all serializers that were handling the version incorrectly

Verifying this change

  • Updated tests are all passing

Does this pull request potentially affect one of the following parts:

  • Dependencies (does it add or upgrade a dependency): (yes / no)
  • The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)
  • The serializers: (yes / no / don't know)
  • The runtime per-record code paths (performance sensitive): (yes / no / don't know)
  • Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
  • The S3 file system connector: (yes / no / don't know)

Documentation

  • Does this pull request introduce a new feature? (yes / no)
  • If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

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throws IOException {
if (readOuterSnapshotVersion <= LAST_VERSION_WITHOUT_ROW_KIND) {
supportsRowKind = false;
} else if (readOuterSnapshotVersion == LAST_VERSION_WITHOUT_ROW_KIND + 1) {
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I think adding another new flag instead of LAST_VERSION_WITHOUT_ROW_KIND + 1 would be better to understand.

}

@Override
protected OuterSchemaCompatibility resolveOuterSchemaCompatibility(
RowSerializer newSerializer) {
if (readVersion <= LAST_VERSION_WITHOUT_ROW_KIND) {
if (supportsRowKind == newSerializer.legacyModeEnabled) {
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I think we should better to add description to describe the relationship between supportsRowKind with legacyModeEnabled.

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fapaul commented Nov 11, 2021

@Myasuka thanks for your review I reworked the RowSerializer to only use supportsRowKind to align it with other serializers. It simplifies the logic, thanks for the hint 👍

@dawidwys dawidwys self-assigned this Nov 16, 2021
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LGTM

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Could you add an additional note in release notes of 1.14 to upgrade directly to 1.14.1 when migrating from 1.13?

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I tried to come up with a different solution and ended up exactly like this. So gj :)

Before this commit some serializers handled the version information
incorrectly in the corresponding serializer snapshot which could lead
during eagerly instantiation that the wrong version of the serializer
was used to deserialize the data.
@fapaul fapaul merged commit 601ef3b into apache:master Nov 24, 2021
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6 participants