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https://issues.apache.org/jira/browse/OAK-1666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella closed OAK-1666.
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Bulk closing for 1.1.8
> FileDataStore inUse map causes contention in concurrent env
> -----------------------------------------------------------
>
> Key: OAK-1666
> URL: https://issues.apache.org/jira/browse/OAK-1666
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Priority: Minor
> Labels: concurrency
> Fix For: 1.1.8
>
>
> JR2 FileDataStore#inUseMap [1] is currently a synchronized map and that at
> times causes contention concurrent env. This map is used for supporting the
> Blob GC logic for JR2.
> With Oak this map content is not used. As a fix we can either
> # Set inUseMap to a Guava Cache Map which has weak keys and value
> # Set inUseMap to a no op map where all put calls are ignored
> # Modify FDS to disable use of inUseMap or make {{usesIdentifier}} protected
> #3 would be a proper fix and #2 can be used as temp workaround untill FDS
> gets fixed
> [1]
> https://github.com/apache/jackrabbit/blob/trunk/jackrabbit-data/src/main/java/org/apache/jackrabbit/core/data/FileDataStore.java#L118
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