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Posted to issues@flink.apache.org by "Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org> on 2017/06/08 15:35:18 UTC

[jira] [Comment Edited] (FLINK-6857) Add global default Kryo serializer configuration to StreamExecutionEnvironment

    [ https://issues.apache.org/jira/browse/FLINK-6857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16042864#comment-16042864 ] 

Tzu-Li (Gordon) Tai edited comment on FLINK-6857 at 6/8/17 3:34 PM:
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[~StephanEwen] no, the current {{addDefaultKryoSerializer}} methods are defaults tied to specific classes, and correspond to the {{addDefaultSerializer(Class, Serializer)}} methods in Kryo.

This JIRA is meant to add a {{setDefaultSerializer}} configuration, which allows overriding the hard default (i.e., when no registered default serializers for a class can be found), which in Kryo is the {{FieldSerializer}}. This would correspond to Kryo's {{setDefaultSerializer(Serializer)}} API.


was (Author: tzulitai):
[~StephanEwen] no, the current {{addDefaultKryoSerializer}} methods are defaults tied to specific classes, and correspond to the {{addDefaultSerializer(Class, Serializer)}} methods in Kryo.

This JIRA is meant to add a {{setDefaultSerializer}} configuration, which allows overriding the hard default (i.e., when no registered defaults for a class can be found), which in Kryo is the {{FieldSerializer}}. This would correspond to Kryo's {{setDefaultSerializer(Serializer)}} API.

> Add global default Kryo serializer configuration to StreamExecutionEnvironment
> ------------------------------------------------------------------------------
>
>                 Key: FLINK-6857
>                 URL: https://issues.apache.org/jira/browse/FLINK-6857
>             Project: Flink
>          Issue Type: Improvement
>          Components: Configuration, Type Serialization System
>            Reporter: Tzu-Li (Gordon) Tai
>
> See ML for original discussion: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/KryoException-Encountered-unregistered-class-ID-td13476.html.
> We should have an additional {{setDefaultKryoSerializer}} method that allows overriding the global default serializer that is not tied to specific classes (out-of-the-box Kryo uses the {{FieldSerializer}} if no matches for default serializer settings can be found for a class). Internally in Flink's {{KryoSerializer}}, this would only be a matter of proxying that configured global default serializer for Kryo by calling {{Kryo.setDefaultSerializer(...)}} on the created Kryo instance.



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