"Cannot create EnumSet for unknown element type" [DATACMNS-1598]

**[wilds](https://jira.spring.io/secure/ViewProfile.jspa?name=wilds)** opened **[DATACMNS-1598](https://jira.spring.io/browse/DATACMNS-1598?redirect=false)** and commented

When you try to apply a projecton to an entity with some EnumSet field, it fails with "Cannot create EnumSet for unknown element type"

Problem related to: spring-projects/spring-boot#15539

 


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**Affects:** 2.1.11 (Lovelace SR11)

**Attachments:**
- [enumset_projection_issue.zip](https://jira.spring.io/secure/attachment/27495/enumset_projection_issue.zip) (_6.75 kB_)

**Referenced from:** pull request https://github.com/spring-projects/spring-data-commons/pull/409, and commits https://github.com/spring-projects/spring-data-commons/commit/cace881a131935e7653fc07374fd2db7043f0530, https://github.com/spring-projects/spring-data-commons/commit/36b95d39cea9f3560a6d989241d14c2c3352c764, https://github.com/spring-projects/spring-data-commons/commit/796baa3db2ccc6703c00200a5d9ccbcafc8b95e3, https://github.com/spring-projects/spring-data-commons/commit/52469e544ac9424fe51abf0ddd79caf1febc4b8a, https://github.com/spring-projects/spring-data-commons/commit/8d219a53cda0ab278e6afd2459577aef857d15a5, https://github.com/spring-projects/spring-data-commons/commit/882cd9597b9a991c33cd35afb2042a3829032cde

**Backported to:** [2.2.1 (Moore SR1)](https://github.com/spring-projects/spring-data-commons/milestone/167?closed=1), [2.1.12 (Lovelace SR12)](https://github.com/spring-projects/spring-data-commons/milestone/166?closed=1)


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"Cannot create EnumSet for unknown element type" [DATACMNS-1598] #2029

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"Cannot create EnumSet for unknown element type" [DATACMNS-1598] #2029

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