NPE fix for SyncStorageEngine read authority am: a962d9eba7 am: 339c4f2b05 am: 58048c1f17 am: eec587edf1 am: 6fc321a66d am: 5e4e02b009 am: 242bdb6d5b am: 4aa78554df am: 20339172bd
am: 20c518816a

* commit '20c518816a0946dff67a3b99b929bc30c9b0ad6c':
  NPE fix for SyncStorageEngine read authority