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https://issues.apache.org/jira/browse/CAY-2866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17873188#comment-17873188
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Nikita Timofeev commented on CAY-2866:
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*5.0*:
https://github.com/apache/cayenne/commit/1ce7e8b7fd72b0a54ac8286fa2a6ad87a99b1410
> DefaultDataDomainFlushAction breaks on circular relationship update
> -------------------------------------------------------------------
>
> Key: CAY-2866
> URL: https://issues.apache.org/jira/browse/CAY-2866
> Project: Cayenne
> Issue Type: Bug
> Components: Core Library
> Affects Versions: 4.2, 4.2.1
> Reporter: Nikita Timofeev
> Assignee: Nikita Timofeev
> Priority: Critical
> Fix For: 4.2.2, 5.0-M1
>
>
> {{DefaultDataDomainFlushAction}} spawns DB row change operation for each side
> of the relationship. It is later discarded if there's nothing to change in
> the DB at the query stage. But that additional operation could lead to a
> faulty cycle detection in the sorting stage.
> One example of this - simple update of a self circular dependency in the
> entity, see https://lists.apache.org/thread/kgrmzyb4z6py6rrvsr6dfvgj4km4rfz1
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