ItemNotFoundException logged on multiple user login attempts

javax.jcr.ItemNotFoundException: 69119af5-7253-42db-92e3-c5dd61851191
at org.apache.jackrabbit.core.ItemManager.getItemData(ItemManager.java:384)
at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:328)
at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:622)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl$FetchNext.perform(NodeIteratorImpl.java:197)
at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:216)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.fetchNext(NodeIteratorImpl.java:183)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.initialize(NodeIteratorImpl.java:214)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.hasNext(NodeIteratorImpl.java:163)
at org.hippoecm.repository.security.group.AbstractGroupManager.getMembershipIds(AbstractGroupManager.java:316)
at org.hippoecm.repository.security.group.AbstractGroupManager.getMembershipIds(AbstractGroupManager.java:309)
at org.hippoecm.repository.security.SecurityManager.getMemberships(SecurityManager.java:366)
at org.hippoecm.repository.security.SecurityManager.assignGroupPrincipals(SecurityManager.java:592)
at org.hippoecm.repository.security.SecurityManager.assignPrincipals(SecurityManager.java:576)
at org.hippoecm.repository.security.HippoLoginModule.login(HippoLoginModule.java:141)
at org.apache.jackrabbit.core.security.authentication.LocalAuthContext.login(LocalAuthContext.java:86)
at org.apache.jackrabbit.core.RepositoryImpl.login(RepositoryImpl.java:1498)
at org.hippoecm.repository.impl.RepositoryDecorator.login(RepositoryDecorator.java:65)
at org.hippoecm.repository.HippoRepositoryImpl.login(HippoRepositoryImpl.java:106)
at org.hippoecm.repository.HippoRepositoryImpl.login(HippoRepositoryImpl.java:118)
...skipping...
at org.apache.jackrabbit.core.ItemManager.getItem(ItemManager.java:622)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl$FetchNext.perform(NodeIteratorImpl.java:197)
at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:216)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.fetchNext(NodeIteratorImpl.java:183)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.initialize(NodeIteratorImpl.java:214)
at org.apache.jackrabbit.core.query.lucene.NodeIteratorImpl.hasNext(NodeIteratorImpl.java:163)
at org.hippoecm.repository.security.group.AbstractGroupManager.getMembershipIds(AbstractGroupManager.java:316)
at org.hippoecm.repository.security.group.AbstractGroupManager.getMembershipIds(AbstractGroupManager.java:309)
at org.hippoecm.repository.security.SecurityManager.getMemberships(SecurityManager.java:366)
at org.hippoecm.repository.security.SecurityManager.assignGroupPrincipals(SecurityManager.java:592)
at org.hippoecm.repository.security.SecurityManager.assignPrincipals(SecurityManager.java:576)
at org.hippoecm.repository.security.HippoLoginModule.login(HippoLoginModule.java:141)
at org.apache.jackrabbit.core.security.authentication.LocalAuthContext.login(LocalAuthContext.java:86)
at org.apache.jackrabbit.core.RepositoryImpl.login(RepositoryImpl.java:1498)
at org.hippoecm.repository.impl.RepositoryDecorator.login(RepositoryDecorator.java:65)
at org.hippoecm.repository.HippoRepositoryImpl.login(HippoRepositoryImpl.java:106)
at org.hippoecm.repository.HippoRepositoryImpl.login(HippoRepositoryImpl.java:118)
at org.hippoecm.hst.core.jcr.pool.JcrHippoRepository.login(JcrHippoRepository.java:205)
at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository$SessionFactory.makeObject(BasicPoolingRepository.java:1115)
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1148)
at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository.login(BasicPoolingRepository.java:337)
at org.hippoecm.hst.core.jcr.pool.BasicPoolingRepository.login(BasicPoolingRepository.java:365)
at org.hippoecm.hst.core.jcr.pool.LazyMultipleRepositoryImpl.login(LazyMultipleRepositoryImpl.java:189)
at org.hippoecm.hst.core.jcr.pool.MultipleRepositoryImpl.login(MultipleRepositoryImpl.java:173)
at org.hippoecm.hst.core.jcr.EventListenersContainerImpl.doInit(EventListenersContainerImpl.java:164)
at org.hippoecm.hst.core.jcr.EventListenersContainerImpl$EventListenersContainerSessionChecker.run(EventListenersContainerImpl.java:406)

visiting site.war and cms.war, configuser and null each get the exception.