public static void rollMasterKey(
      AbstractDelegationTokenSecretManager<? extends AbstractDelegationTokenIdentifier> mgr)
      throws IOException {
    mgr.rollMasterKey();
  }
Workaround for serialization of {@link DelegationTokenInformation} through package access.
Future version of Hadoop should add this to DelegationTokenInformation itself.
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/security/token/delegation/MetastoreDelegationTokenSupport.java