public static WALEdit createReplicationMarkerEdit(byte[] rowKey, long timestamp) {
    KeyValue kv =
      new KeyValue(rowKey, METAFAMILY, REPLICATION_MARKER, timestamp, KeyValue.Type.Put);
    return new WALEdit().add(kv);
  }
Creates a replication tracker edit with {@link #METAFAMILY} family and
{@link #REPLICATION_MARKER} qualifier and has null value.
@param rowKey    rowkey
@param timestamp timestamp
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALEdit.java