问题是如何为sqoop导入运行java程序？
我使用的是sqoop版本1.4.7和hadoop版本2.7.2，我正在尝试在net beans ide 8.1上运行以下代码：

package sqoop5;
 import java.io.File;
 import java.io.FileInputStream;
 import java.util.Properties;
 import com.cloudera.sqoop.SqoopOptions;
 import com.cloudera.sqoop.tool.BaseSqoopTool;
 import com.cloudera.sqoop.tool.ImportTool;
 import java.io.BufferedReader;
 import java.io.InputStreamReader;

 public class Sqoop5 {

    public static void main(String[] args) throws Exception  {
      String driver = "org.postgresql.Driver";
      Class.forName(driver).newInstance();
      SqoopOptions options = new SqoopOptions();
      options.setConnectString(("jdbc:postgresql://
      127.0.0.1:5432/postgres"));
      options.setTableName(("new"));
      options.setUsername(("postgres"));
      options.setPassword(("********"));
      options.setNumMappers(1);
      options.setTargetDir(("hdfs://  
      127.0.0.1:9000/usr/new11"));     
      options.setFileLayout(com.cloudera.sqoop.
      SqoopOptions.FileLayout.AvroD ataFile);
      new ImportTool().run((com.cloudera.sqoop.SqoopOptions) 
      options);
    }    
 }

错误消息如下：

cause:org.apache.hadoop.ipc.RemoteException: Server IPC 
         version 9 
         cannot communicate with client version 4
         Aug 05, 2019 10:46:29 AM org.apache.sqoop.tool.ImportTool run
         SEVERE: Encountered IOException running import job: 
         org.apache.hadoop.ipc.RemoteException: Server IPC version 9 
         cannot 
         communicate with client version 4
         at org.apache.hadoop.ipc.Client.call(Client.java:1113)
         at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
         at com.sun.proxy.$Proxy6.getProtocolVersion(Unknown Source)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod)