'java.lang.IllegalArgumentException Group passed to HibernateGroupManager must be of type DefaultHibernateGroup' when Deleting a Group
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Symptoms
Deleting a group fails with an error like the following:
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java.lang.IllegalArgumentException: Group passed to HibernateGroupManager must be of type 'DefaultHibernateGroup'
at com.atlassian.user.impl.hibernate.HibernateGroupManager.getMemberNames(HibernateGroupManager.java:180)
Stack Trace:
java.lang.IllegalArgumentException: Group passed to HibernateGroupManager must be of type 'DefaultHibernateGroup'
at com.atlassian.user.impl.hibernate.HibernateGroupManager.getMemberNames(HibernateGroupManager.java:180)
at com.atlassian.user.impl.cache.CachingGroupManager.getMemberNames(CachingGroupManager.java:205)
at com.atlassian.user.impl.cache.CachingGroupManager.removeGroup(CachingGroupManager.java:146)
Cause
When performing a migration, there are duplicate groups in the LDAP and local hibernate repositories.
Resolution
Rename or delete the duplicate group in LDAP.
Repopulate the Confluence cache (restart or go to
Administration >> Cache Statistics >> Flush Cache >> Advanced >> Flush All).
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