// Let's force a roll-over
rm.getRMContext().getContainerTokenSecretManager().rollMasterKey();
rm.getRMContext().getNMTokenSecretManager().rollMasterKey();
// Heartbeats after roll-over and before activation should be fine.
response = nm.nodeHeartbeat(true);
Assert.assertNotNull(containerToken +
"Heartbeats after roll-over and before activation should not err out.",
response.getContainerTokenMasterKey());
Assert.assertNotNull(nmToken +
"Heartbeats after roll-over and before activation should not err out.",