public boolean unmarkStopped(List<ReplicaId> replicaIds) {
    return clusterParticipant.setReplicaStoppedState(replicaIds, false);
  }
Sets a list of replicaIds to started status
@param replicaIds a list of replicas whose status would be set to started.
@return {@code true} if replica is successfully unmarked and becomes started. {@code false} if not.
ambry-api/src/main/java/com/github/ambry/clustermap/ReplicaStatusDelegate.java