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https://issues.apache.org/jira/browse/OAK-2681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14380222#comment-14380222
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Stefan Egli commented on OAK-2681:
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Related to OAK-2682 which would like to introduce a WARN if the clock in a
cluster is off by too much.
> Update lease without holding lock
> ---------------------------------
>
> Key: OAK-2681
> URL: https://issues.apache.org/jira/browse/OAK-2681
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, mongomk
> Reporter: Marcel Reutegger
> Fix For: 1.1.8
>
>
> A lease update of the DocumentNodeStore on MongoDB will acquire a lock in
> MongoDocumentStore to perform the changes. The locking is only necessary for
> changes in the 'nodes' collection, because only those documents are cached
> and the locking makes sure the cache is consistent. The MongoDocumentStore
> must be changed to only acquire a lock when changes are done in the 'nodes'
> collection.
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