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https://issues.apache.org/jira/browse/OAK-2663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella closed OAK-2663.
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Bulk Close for 1.3.0
> Unique property index can trigger OOM during upgrade of large repository
> ------------------------------------------------------------------------
>
> Key: OAK-2663
> URL: https://issues.apache.org/jira/browse/OAK-2663
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: upgrade
> Reporter: Chetan Mehrotra
> Assignee: Thomas Mueller
> Labels: performance, resilience
> Fix For: 1.3.0, 1.2.3, 1.0.15
>
> Attachments: OAK-2663.patch
>
>
> {{PropertyIndexEditor}} when configured for unique index maintains an in
> memory state of indexed property in {{keysToCheckForUniqueness}}. This set
> would accumulate all the unique values being indexed.
> In case of upgrade where the complete upgrade is performed in single commit
> this state can become very large. Further later while exiting the editor
> validates that all such values are actually unique by iterating over all such
> values.
> We should look into other possible ways to enforce uniqueness constraint
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