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https://issues.apache.org/jira/browse/OAK-10526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17781824#comment-17781824
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Stefan Egli commented on OAK-10526:
-----------------------------------
* test case to reproduced added in PR :
https://github.com/apache/jackrabbit-oak/pull/1184
> split doc can contain still referenced revisions without _sdMaxRevTime
> indicating so
> ------------------------------------------------------------------------------------
>
> Key: OAK-10526
> URL: https://issues.apache.org/jira/browse/OAK-10526
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: documentmk
> Affects Versions: 1.58.0
> Reporter: Stefan Egli
> Priority: Major
>
> When a document grows too large, part of it is split into previous documents.
> Those also called split documents are marked with _sdMaxRevTime reflecting
> the newest (max) revision timestamp the document contains. GC later can
> delete split documents where _sdMaxRevTime is older than 24h or any existing
> checkpoint. This is based on the assumption that _sdMaxRevTime can be
> compared to "older than 24h or any existing checkpoint" - while _sdMaxRevTime
> only indicates the newest revision contained within. There can thus be a
> situation when a split document contains a revision that is still referenced
> by a current (not older than 24h) head revision or a checkpoint - but it
> _sdMaxRevTime is old enough for GC to remove it.
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