Cyclic shared group names cause overflow.
A user reports that after upgrading from Openfire 4.4.2 to 4.4.3, hundreds of these messages are logged:
org.jivesoftware.openfire.group.GroupManager - Cyclic sharing groups found. Please remove the cycle of groups
This appears to be a problem caused by a scenario that employs group sharing, and has a cycling dependency (group A is shared with group B, which is shared with group A).
Openfire should properly detect and handle cyclic references in shared groups.
It is likely that this issue is introduced by the fix for OF-1904, which was solved by reverting to older code.