[
https://issues.apache.org/jira/browse/FLINK-3333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15139668#comment-15139668
]
Greg Hogan commented on FLINK-3333:
-----------------------------------
I can think of four return values from a user defined {{reduce()}}: left,
right, new object, or a long-lived local object. The long-lived user object can
be later modified by the user, but storing and later modifying the left or
right input objects is unsafe. That is what I consider an edge case, an action
that no user is expected to perform, and that cannot be prevented without
impacting performance (a.k.a. disabling object reuse).
> Documentation about object reuse should be improved
> ---------------------------------------------------
>
> Key: FLINK-3333
> URL: https://issues.apache.org/jira/browse/FLINK-3333
> Project: Flink
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 1.0.0
> Reporter: Gabor Gevay
> Assignee: Gabor Gevay
> Priority: Blocker
> Fix For: 1.0.0
>
>
> The documentation about object reuse \[1\] has several problems, see \[2\].
> \[1\]
> https://ci.apache.org/projects/flink/flink-docs-master/apis/batch/index.html#object-reuse-behavior
> \[2\]
> https://docs.google.com/document/d/1cgkuttvmj4jUonG7E2RdFVjKlfQDm_hE6gvFcgAfzXg/edit
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
