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https://issues.apache.org/jira/browse/OAK-5238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15751084#comment-15751084
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Marcel Reutegger commented on OAK-5238:
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We can, but I prefer we first release the fix in 1.5.16 and wait for additional
feedback before we merge it into a stable branch.
> IndexCopier causes concurrent update on NodeBuilder
> ---------------------------------------------------
>
> Key: OAK-5238
> URL: https://issues.apache.org/jira/browse/OAK-5238
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: lucene
> Affects Versions: 1.2.3, 1.0.15, 1.4.0
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Labels: candidate_oak_1_4
> Fix For: 1.5.16, 1.6
>
> Attachments: OAK-5238-1.patch, OAK-5238-2.patch, OAK-5238.patch
>
>
> OAK-2247 introduced the copy-on-write feature for lucene index in Oak. This
> feature may result in a NodeBuilder updated by multiple threads concurrently.
> New index files are first stored on the local filesystem and then copied
> asynchronously into the repository. At the same time the async index update
> thread manipulates the node builders as well.
> With MongoMK this results in unexpected conflicts and failed async index
> updates.
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