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Server Install Problem - java Unsupported Class Version Error

leitnickleitnick Member Posts: 2 Learner III
edited July 2019 in Help

Tried to run the 'rapidminer-server-installer' on node but came up with following error and would not open...(note: java -version is "1.7.0_75")

 

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/rapidminer/server/installer/Starter : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
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)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

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Best Answer

  • phellingerphellinger Employee-RapidMiner, Member Posts: 103 RM Engineering
    Solution Accepted

    Hi,

     

    you need Java 8 to run Server.

    This is the typical Java error message reporting that Java 8 (referred here as "major version" 52) is required.

     

    Best,

    Peter

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