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https://issues.apache.org/jira/browse/SPARK-55152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fangchen Li updated SPARK-55152:
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Description:
The current Kryo serialization depends on Twitter's chill library, which has no
Scala 3 support and is unmaintained (last release: June 2021).
We have a few options here:
# Fork chill and take on its maintenance. This requires the least change in
Spark, but adds extra responsibility and maintenance burden. Update: I forked
chill and did a full update. The link:
[https://github.com/forge-labs-dev/chill]. I'm not sure what to do with this
fork yet. I'll try to get in touch with someone in X and have it merged back.
# Switch to
[scala-kryo-serialization|https://github.com/altoo-ag/scala-kryo-serialization],
which supports Scala 3 but requires Kryo 5.
# Consider adding [Apache Fory|https://github.com/apache/fory] as an
alternative serializer. It's much better maintained and much faster than Kryo.
But we probably still need to keep Kryo for backward compatibility.
was:
The current Kryo serialization depends on Twitter's chill library, which has no
Scala 3 support and is unmaintained (last release: June 2021).
We have a few options here:
# Fork chill and take on its maintenance. This requires the least change in
Spark, but adds extra responsibility and maintenance burden. Update: I forked
chill and did a full update. The link:
[https://github.com/forge-labs-dev/chill]. I'm not sure what to do with this
fork yet. I'll try to get in touch with X and have it merged back.
# Switch to
[scala-kryo-serialization|https://github.com/altoo-ag/scala-kryo-serialization],
which supports Scala 3 but requires Kryo 5.
# Consider adding [Apache Fory|https://github.com/apache/fory] as an
alternative serializer. It's much better maintained and much faster than Kryo.
But we probably still need to keep Kryo for backward compatibility.
> Evaluate serialization strategy for Scala 3 support
> ---------------------------------------------------
>
> Key: SPARK-55152
> URL: https://issues.apache.org/jira/browse/SPARK-55152
> Project: Spark
> Issue Type: Sub-task
> Components: Spark Core
> Affects Versions: 4.2.0
> Reporter: Fangchen Li
> Priority: Major
>
> The current Kryo serialization depends on Twitter's chill library, which has
> no Scala 3 support and is unmaintained (last release: June 2021).
>
> We have a few options here:
> # Fork chill and take on its maintenance. This requires the least change in
> Spark, but adds extra responsibility and maintenance burden. Update: I forked
> chill and did a full update. The link:
> [https://github.com/forge-labs-dev/chill]. I'm not sure what to do with this
> fork yet. I'll try to get in touch with someone in X and have it merged back.
> # Switch to
> [scala-kryo-serialization|https://github.com/altoo-ag/scala-kryo-serialization],
> which supports Scala 3 but requires Kryo 5.
> # Consider adding [Apache Fory|https://github.com/apache/fory] as an
> alternative serializer. It's much better maintained and much faster than
> Kryo. But we probably still need to keep Kryo for backward compatibility.
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