嗨，我正在尝试在集群中运行sparkr。当我使用yarn客户端运行sparkr时，我得到了一个错误。

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/hadoop/fs/FSDataInputStream : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at org.apache.spark.deploy.SparkSubmitDriverBootstrapper$.main(SparkSubmitDriverBootstrapper.scala:71)
at org.apache.spark.deploy.SparkSubmitDriverBootstrapper.main(SparkSubmitDriverBootstrapper.scala)

我尝试了以下查询。

/SparkR-pkg/lib/SparkR/sparkR-submit --master yarn-client /home/user/examples/pi.R yarn-client 4

任何帮助都将不胜感激。