1） 我们正在尝试使用s3distcp jar(http://docs.aws.amazon.com/elasticmapreduce/latest/developerguide/usingemr_s3distcp.html#emr-s3distcp verisons），用于将hdfs文件从aws china hadoop master示例复制到aws china s3 bucket。
2） 我们正在执行来自aws中国hadoop大师的命令

hadoop jar /usr/share/aws/emr/s3-dist-cp/lib/s3-dist-cp.jar --src hdfs://${HDFS_DIR} --dest s3n://${S3_BUCKETNAME}/${Folder_Name}/ --s3Endpoint=s3.cn-north-1.amazonaws.com.cn

3） 当我们运行这个“s3distcp”命令时，抛出以下异常

16/02/22 08:39:52 INFO s3distcp.S3DistCp: Using output path 'hdfs:/tmp/f6a864f8-d70d-426f-b05f-08f7d0097fd9/output'
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/gson/internal/Pair
    at com.amazon.elasticmapreduce.s3distcp.S3DistCp.getSrcPrefixes(S3DistCp.java:468)
    at com.amazon.elasticmapreduce.s3distcp.S3DistCp.createInputFileList(S3DistCp.java:521)
    at com.amazon.elasticmapreduce.s3distcp.S3DistCp.run(S3DistCp.java:850)
    at com.amazon.elasticmapreduce.s3distcp.S3DistCp.run(S3DistCp.java:720)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.amazon.elasticmapreduce.s3distcp.Main.main(Main.java:22)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: com.google.gson.internal.Pair
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 13 more

4） 另外，您是否可以让我们知道，如果有任何其他替代方案，然后使用“s3 dist cp”从aws中国hadoop主示例复制hdfs文件到aws中国s3 bucket？
谢谢和问候，
阿密特