This mailing list is for discussion of the development of Cassandra - since your mail discusses building a system using Cassandra, it is better suited for the Users mailing list.
That error indicates that you've built the system using JDK 8 (the minimum Java version supported on the 3.x series) but are running it on a lower version of the Java runtime. I'd suggest double-checking the version of Java used on your test system. If you have any followup questions, please start a new thread on the Users mailing list. On Tue, May 10, 2016 at 12:07 PM, Ben Vogan <b...@shopkick.com> wrote: > Hi all, > > I am trying to use Cassandra (v3.5) from spark (v1.6.0 - CDH 5.7) via the > datastax connector (1.6.0-M2) in scala (2.10.5). My initial test runs fine > locally, but when I try to deploy it to a test machine I am getting the > following exception: > > 16/05/09 23:04:25 WARN Lost task 0.0 in stage 1.0 (TID 8, > hcompute005.internal.shopkick.com): > java.lang.UnsupportedClassVersionError: > org/apache/cassandra/utils/UUIDGen : 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 java.lang.ClassLoader.loadClass(ClassLoader.java:358) > > at > > sandbox.ben.cassandra.UserActivityTransformLoader.extractUserActivity(UserActivityTransformLoader.scala:121) > > > > The line of code that is failing is just: > > UUIDGen.getTimeUUID(timestamp).toString > > > > The java version in this environment is: > > $ java -version > > java version "1.8.0_91" > > Java(TM) SE Runtime Environment (build 1.8.0_91-b14) > > Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode) > > > > Any advice on how to proceed here? > > Thanks, > > --Ben > -- <http://www.datastax.com/> Joel Knighton Cassandra Developer | joel.knigh...@datastax.com <https://www.linkedin.com/company/datastax> <https://www.facebook.com/datastax> <https://twitter.com/datastax> <https://plus.google.com/+Datastax/about> <http://feeds.feedburner.com/datastax> <https://github.com/datastax/> <http://cassandrasummit.org/Email_Signature>