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When I try to run the script, I get this error. This is a Python script. Does anyone have this problem? 

[cloudera-scm@ivana-namenode2 /opt/MapReduce/wordcount]$ pydoop script wc.py   /user/cloudera-scm/MapReduce/wordcount/data/text /user/cloudera-scm/MapReduce/wordcount/output
Exception in thread "main" java.lang.UnsupportedClassVersionError: it/crs4/pydoop/mapreduce/pipes/Submitter : 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)
ERROR - RunCmdError:  command exited with 1 status
Daniel
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Ivana Isailovic
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    Welcome to Stack Overflow! Please take the [tour] and visit the [help] to get the most out of this site. – CJ Dennis Aug 10 '18 at 11:42

1 Answers1

1

When you turn to this existing question you find the explanation for the error message: you have some java class that was compiled for Java8.

But the JVM asked to execute that class is older than Java8.

In other words: you have an inconsistent setup. Some part of your environment wants to use something build for Java8, but that part that executes things is running an older version of Java.

So, the answer here is that you have to understand better what your setup is composed of, to either use an "older" version of the underlying library/tool, or to make sure that a Java8 JVM is available to run classes.

GhostCat
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