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via GitHub by SebastianFinkel
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org/apache/spark/launcher/Main : Unsupported major.minor version 51.0
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net/lightbody/bmp/proxy/Main : Unsupported major.minor version 51.0
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controllers/routes : Unsupported major.minor version 51.0
java.lang.UnsupportedClassVersionError: org/apache/spark/launcher/Main : Unsupported major.minor version 51.0	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)	at java.lang.ClassLoader.defineClass(ClassLoader.java:621)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)	at java.net.URLClassLoader.access$000(URLClassLoader.java:58)