private void resetLastOpInfo() {
    setLastOpStartTime(-1);
    setLastOpLastUpdateTime(-1);
    setLastOpEndTime(-1);
  }
The {@link AlertDefinitionCommandTransition} is used to capture the
transition from {@link State#INSTALLING} to {@link State#INSTALLED} so that
the host affected will have new {@link AlertDefinitionCommand}s pushed to
it.
ambari-server/src/main/java/org/apache/ambari/server/state/svccomphost/ServiceComponentHostImpl.java