ItemStateException on concurrently committing transactions of versioning operations

see tests in JCR-335

org.apache.jackrabbit.core.state.ItemStateException: Unable to resolve path for item: 69d80165-7ef5-4b6b-8aa9-be9c9be1f994
at org.apache.jackrabbit.core.observation.EventStateCollection.getPath(EventStateCollection.java:525)
at org.apache.jackrabbit.core.observation.EventStateCollection.createEventStates(EventStateCollection.java:377)
at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.begin(SharedItemStateManager.java:547)
at org.apache.jackrabbit.core.state.SharedItemStateManager.beginUpdate(SharedItemStateManager.java:668)
at org.apache.jackrabbit.core.state.XAItemStateManager.prepare(XAItemStateManager.java:151)
at org.apache.jackrabbit.core.version.XAVersionManager.prepare(XAVersionManager.java:431)
at org.apache.jackrabbit.core.TransactionContext.prepare(TransactionContext.java:129)
at org.apache.jackrabbit.core.XASessionImpl.prepare(XASessionImpl.java:309)
at test.JCRUserTransaction.commit(JCRUserTransaction.java:74)
at org.apache.jackrabbit.JRTestDeadlock.run(JRTestDeadlock.java:110)
Caused by: javax.jcr.ItemNotFoundException: failed to build path of 69d80165-7ef5-4b6b-8aa9-be9c9be1f994: a0ecd4b0-a442-4b1e-a2f6-51441f40d452 has no child entry for 69d80165-7ef5-4b6b-8aa9-be9c9be1f994
at org.apache.jackrabbit.core.HierarchyManagerImpl.buildPath(HierarchyManagerImpl.java:308)
at org.apache.jackrabbit.core.HierarchyManagerImpl.getPath(HierarchyManagerImpl.java:357)
at org.apache.jackrabbit.core.observation.EventStateCollection.getPath(EventStateCollection.java:520)
... 9 more