public Map<String, ReplicationStatus> getWalGroupsReplicationStatus() {
    Map<String, ReplicationStatus> walGroupsReplicationStatus = new TreeMap<>();
    if (!this.isOnline()) {
      return walGroupsReplicationStatus;
    }
    List<ReplicationSourceInterface> allSources = new ArrayList<>();
    allSources.addAll(replicationSourceHandler.getReplicationManager().getSources());
    allSources.addAll(replicationSourceHandler.getReplicationManager().getOldSources());
    for (ReplicationSourceInterface source : allSources) {
      walGroupsReplicationStatus.putAll(source.getWalGroupStatus());
    }
    return walGroupsReplicationStatus;
  }
Load the replication executorService objects, if any
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java