public boolean unseal(ReplicaId replicaId) {
    return clusterParticipant.setReplicaSealedState(replicaId, ReplicaSealStatus.NOT_SEALED);
  }
Sets replicaId to read-write status
@param replicaId the {@link ReplicaId} whose status would be set to read-write.
@return {@code true} if replica is successfully unsealed. {@code false} if not.
ambry-api/src/main/java/com/github/ambry/clustermap/ReplicaStatusDelegate.java