Using Hippo Jackrabbit 2.16.2-h1 now requires one specific change in org.hippoecm.repository.jackrabbit.HippoLockManager for CMS < v13: the constructor super() call to the Jackrabbit LockManagerImpl it extends should pass in a null value for the ScheduledExecutorService parameter.
Based on this parameter being passed in as null or the actual value, the patched LockManagerImpl will conditionally retain the earlier 'just-in-time' cleanup of expired locks (CMS < v13), or restore the original Jackrabbit LockManagerImpl behavior (CMS v13+) using a scheduled TimeoutHandler to do the cleanup.
This change and conditional behavior is needed as result of
REPO-1900 which removed the 'just-in-time' custom behavior for CMS v13.
See for more details the patch commited for