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https://issues.apache.org/jira/browse/OFBIZ-6747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17616204#comment-17616204
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Ben Manes commented on OFBIZ-6747:
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I see that comment in your {{ldap/build.gradle}} file, but now that you changed 
the "consumer" to 11 it should allow you to upgrade?

> Replace ConcurrentLinkedHashMap by Caffeine
> -------------------------------------------
>
>                 Key: OFBIZ-6747
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-6747
>             Project: OFBiz
>          Issue Type: Task
>          Components: ALL COMPONENTS
>            Reporter: Ben Manes
>            Assignee: Jacques Le Roux
>            Priority: Minor
>
> Similar to OFBIZ-3779, please consider upgrading the library used by 
> [UtilCache|https://github.com/apache/ofbiz/blob/trunk/framework/base/src/main/java/org/apache/ofbiz/base/util/cache/UtilCache.java]
>  (v1.2). The current version is 1.4.2 and is the last major release planned.
> The preferable alternative would be to upgrade to 
> [Caffeine|https://github.com/ben-manes/caffeine]. This is a Java 8 rewrite 
> based on what I've learned since developing CLHM and Guava's cache. As 
> expected it provides [superior 
> performance|https://github.com/ben-manes/caffeine/wiki/Benchmarks]. It also 
> provides a [near 
> optimal|https://github.com/ben-manes/caffeine/wiki/Efficiency] eviction 
> policy.



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