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Posted to dev@flink.apache.org by "Truong Duc Kien (JIRA)" <ji...@apache.org> on 2018/03/22 04:23:00 UTC

[jira] [Created] (FLINK-9052) Flink complains when scala.Option is used inside POJO

Truong Duc Kien created FLINK-9052:
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             Summary: Flink complains when scala.Option is used inside POJO
                 Key: FLINK-9052
                 URL: https://issues.apache.org/jira/browse/FLINK-9052
             Project: Flink
          Issue Type: Bug
          Components: Type Serialization System
    Affects Versions: 1.4.2
            Reporter: Truong Duc Kien


According to the documentation, Flink has a specialized serializer for Option type. However, when an Option field is used inside a POJO, the following WARNING appears in TaskManagers' log.

 

{{No fields detected for class scala.Option. Cannot be used as a PojoType. Will be handled as GenericType}}



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