[
https://issues.apache.org/jira/browse/FLINK-5790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15865743#comment-15865743
]
ASF GitHub Bot commented on FLINK-5790:
---------------------------------------
Github user shixiaogang commented on the issue:
https://github.com/apache/flink/pull/3305
@StephanEwen Thanks a lot for your comments. I have updated the code as
suggested.
> Use list types when ListStateDescriptor extends StateDescriptor
> ---------------------------------------------------------------
>
> Key: FLINK-5790
> URL: https://issues.apache.org/jira/browse/FLINK-5790
> Project: Flink
> Issue Type: Improvement
> Reporter: Xiaogang Shi
> Assignee: Xiaogang Shi
>
> Flink keeps the state serializer in {{StateDescriptor}}, but it's the
> serializer of list elements that is put in {{ListStateDescriptor}}. The
> implementation is a little confusing. Some backends need to construct the
> state serializer with the element serializer by themselves.
> We should use an {{ArrayListSerializer}}, which is composed of the serializer
> of the element, in the {{ListStateDescriptor}}. It helps the backend to avoid
> constructing the state serializer.
> If a backend needs customized serialization of the state (e.g.
> {{RocksDBStateBackend}}), it still can obtain the element serializer from the
> {{ArrayListSerializer}}.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
