**[Phil Webb](https://jira.spring.io/secure/ViewProfile.jspa?name=pwebb)** opened **[SPR-11720](https://jira.spring.io/browse/SPR-11720?redirect=false)** and commented The `calculateShift` method contains a bug which means that the maximum concurrency level is not respected. --- **Affects:** 4.0.3 **Issue Links:** - #21532 ConcurrentReferenceHashMap does not enforce visibility of cached EntrySet **Backported to:** [3.2.9](https://github.com/spring-projects/spring-framework/milestone/97?closed=1)