Github user rmetzger commented on the issue:
https://github.com/apache/flink/pull/2623
This change adds Kryo-shaded to our dependency tree:
```
[INFO] | +- com.twitter:chill_2.10:jar:0.8.1:compile
[INFO] | | +- com.twitter:chill-java:jar:0.8.1:compile
[INFO] | | \- com.esotericsoftware:kryo-shaded:jar:3.0.3:compile
[INFO] | | \- com.esotericsoftware:minlog:jar:1.3.0:compile
```
I suspect that maven is not recognizing this because chill seems to depend
on `kryo-shaded`.
Apparently, `kryo-shaded` has a shaded ASM version included, but it is not
relocating the regular Kryo classes. So we'll end up having two Kryo versions
in our classpath.
So if we want to upgrade Kryo, we need to do it explicitly, to avoid having
two Kryo versions in our classpath.
Another issue we need to consider is the serialization compatibility.
Savepoints in Flink could potentially contain data serialized with Kryo 2.24.
If we want to provide savepoint compatibility between Flink 1.1 and 1.2, we
need to consider that.
According to the Kryo documentation, 2.24 to 3.0.0 is serialization
compatible (I hope the same holds true for chill):
https://github.com/EsotericSoftware/kryo/blob/master/CHANGES.md#2240---300-2014-10-04
I would like to hear @StephanEwen and @uce's opinion on this.
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