Usama Umar ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=630df75... ) *commented* on HHH-15968 ( https://hibernate.atlassian.net/browse/HHH-15968?atlOrigin=eyJpIjoiMGM5OT... ) Re: Sporadic ClassCastException when querying for Set<Enum>. ( https://hibernate.atlassian.net/browse/HHH-15968?atlOrigin=eyJpIjoiMGM5OT... ) For now, at least with the Spring Data JPA, you can make that problem disappear using spEL {{((:# {#filterByRole == null} = true) OR role IN (:filterByRole))}} ( https://hibernate.atlassian.net/browse/HHH-15968#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-15968#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100219- sha1:ac3e918 )