public VcrClusterParticipant getVcrClusterParticipant() {
    return vcrClusterParticipant;
  }
This method is expected to be called in the exit path as long as the AmbryServer instance construction was
successful. This is expected to be called even if {@link #startup()} did not succeed.
ambry-vcr/src/main/java/com/github/ambry/vcr/VcrServer.java