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https://issues.apache.org/jira/browse/NIFI-1132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005676#comment-15005676
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Tony Kurc commented on NIFI-1132:
---------------------------------
I'll merge this patch in.
> FlowFile and Provenance Events hold an unbounded number of "lineage
> identifiers" which causes OutOfMemoryError when merging many objects
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-1132
> URL: https://issues.apache.org/jira/browse/NIFI-1132
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Critical
> Fix For: 0.4.0
>
> Attachments:
> 0001-NIFI-1132-Limited-number-of-Lineage-Identifiers-held.patch
>
>
> Currently, FlowFile and Provenance Event hold a collection of "lineage
> identifiers." I.e., the UUID of every FlowFile that was used to make up
> 'this' FlowFile. However, this is not really used and is currently unbounded.
> Since we already have this information via the Provenance JOIN Events, we
> should get rid of these methods all together. This cannot happen until the
> next Major Release, though, in order to maintain backward compatibility. For
> the time being, will limit number of UUID's stored and deprecate the methods.
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