我正在尝试运行以下代码：

Cluster cluster = new Cluster();
cluster.add("localhost", port_number);
Client client = new Client(cluster);
RemoteHTable table = new RemoteHTable(client, "my_table");
Scan scan = new Scan();
scan.setStartRow(startKey);
scan.setStopRow(endKey);
scan.addFamily(columnFamily);
ResultScanner scanner = table.getScanner(scan);

但最后一行是：

Exception in thread "main" java.lang.UnsupportedOperationException: This is supposed to be overridden by subclasses.
    at com.google.protobuf.GeneratedMessage.getUnknownFields(GeneratedMessage.java:180)
    at org.apache.hadoop.hbase.rest.protobuf.generated.ScannerMessage$Scanner.getSerializedSize(ScannerMessage.java:274)
    at com.google.protobuf.AbstractMessageLite.toByteArray(AbstractMessageLite.java:62)
    at org.apache.hadoop.hbase.rest.model.ScannerModel.createProtobufOutput(ScannerModel.java:705)
    at org.apache.hadoop.hbase.rest.client.RemoteHTable$Scanner.(RemoteHTable.java:510)
    at org.apache.hadoop.hbase.rest.client.RemoteHTable.getScanner(RemoteHTable.java:620)
    at com.amazon.cq.banyan.hbase.example.HBaseRestClient.main(HBaseRestClient.java:55)

这是我的pom.xml：

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-common</artifactId>
    <version>2.6.0</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase</artifactId>
    <version>0.94.18</version>
</dependency>

这种情况也发生在尝试做看跌期权的时候。