Alexander Kasper created AVRO-1865:
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Summary: GenericData.Array class missing no arg constructor for
Kryo serialization
Key: AVRO-1865
URL: https://issues.apache.org/jira/browse/AVRO-1865
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.8.1
Reporter: Alexander Kasper
Attachments: add-no-arg-ctor-genericdata-array.diff
When trying to serialize Java classes generated by Avro that contain a field as
follows:
`array<MyClass> myclasses = []`
serialization fails with the following error message
`com.esotericsoftware.kryo.KryoException: Class cannot be created (missing
no-arg constructor)`
This is a common enough issue with Kryo that they have a dedicated section on
their website on it:
http://docs.datatorrent.com/troubleshooting/#application-throwing-following-kryo-exception
The attached patch adds a no args constructor for the inner class Array of
GenericData with zero entries and a dummy schema. My personal tests for
serialization with Kryo were successful when using it. Since I do not have
complete insight into Avro I'd like to know if this could be a breaking change
and how to test it if so.
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