Problem serializing Java 16 records

[Stuart Sharpe]

Hi,

I'm using Kryo 5.1.1 on JDK 16.0.2.

I am struggling to serialize records whose fields are not of a concrete type.

Please find attached a simple example. It declares a record with a field of type java.lang.Number, and constructs an instance of this using an Integer. Attempting to serialize the record fails with "Class is not registered: java.lang.Number" (registering java.lang.Number obviously doesn't help).

It works fine if the record's field is declared as a concrete type such as int or Integer. A regular class with a field of type Number also works fine.

Note that I am seeing this behaviour with fields of any interface type - java.lang.Number is just an example. I first ran into this after converting an existing class to a record which has a field of type java.util.Set.

Am I missing something? Any help would be appreciated.

Thanks

Stu

[Thomas Heigl]

Hi Stuart,

Can you please create a GitHub issue for this?

Thanks,

Thomas

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[Stuart Sharpe]

Created https://github.com/EsotericSoftware/kryo/issues/847

Thanks

Stu