[
https://issues.apache.org/jira/browse/FLINK-16555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17062719#comment-17062719
]
Stephan Ewen commented on FLINK-16555:
--------------------------------------
[~qqibrow] Before assigning the issue to you, could you outline how you want to
approach this?
> Preflight check for known unstable hashCodes.
> ---------------------------------------------
>
> Key: FLINK-16555
> URL: https://issues.apache.org/jira/browse/FLINK-16555
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream, API / Type Serialization System
> Reporter: Stephan Ewen
> Priority: Critical
> Labels: usability
> Fix For: 1.11.0
>
>
> Data types can only be used as keys, if they have a stable hash code
> implementation that is deterministic across JVMs. Otherwise, the keyBy()
> operations will result in incorrect data routing.
> We should eagerly check the key type information for known cases types with
> unstable hash code, such as
> * arrays
> * enums
> * anything that does not override Object.hashCode
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
