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https://issues.apache.org/jira/browse/OOZIE-865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414200#comment-13414200
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Robert Kanter commented on OOZIE-865:
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That's good; verifying unequal fork/join pairs would probably get really
complicated.
(just to clarify: the patch I uploaded does not allow unequal fork/join pairs)
> ForkJoin validator checks total lengths of forks vs. joins instead of actual
> paths
> ----------------------------------------------------------------------------------
>
> Key: OOZIE-865
> URL: https://issues.apache.org/jira/browse/OOZIE-865
> Project: Oozie
> Issue Type: Bug
> Affects Versions: 3.2.0
> Reporter: Harsh J
> Assignee: Robert Kanter
> Attachments: OOZIE-865.patch, workflow.xml
>
>
> Consider a WF that has four fork paths, each to a decision node, and each of
> these eventually in their further paths end at a single join node (thereby
> resulting in a valid DAG).
> When such a WF is passed to Oozie and fork join validator is enabled, the
> validation fails cause the numForks(4) > numJoins(1). This naive way appears
> to be wrong to compare, and we should ideally only compare true path based
> forks->joins lists, if possible.
> This causes a regression if the fork join validation is left enabled.
> Workaround for such workflows currently is to disable fork join validation
> via {{oozie.validate.ForkJoin}} set to {{false}} at the server.
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