Question

我一直试图在Windows 7 64bit上安装apache cassandra，我遵循了planetcassandra虚拟培训的视频教程。当我尝试在终端上执行时操作中心打开的 nodetool status 会给我以下错误：

C:\Program Files\DataStax Community\apache-cassandra\bin>nodetool status
Starting NodeTool
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/ca
ssandra/tools/NodeCmd : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(Unknown Source)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$000(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: org.apache.cassandra.tools.NodeCmd.  Program will exit.

可能是什么问题？是不是我在opscenter中看不到任何活动节点？提前谢谢

Answer 1

     java -version
     javac -version

两个版本应该相同。

在Windows 7上安装apache cassandra的问题

1 个答案: