I am trying to get Cassandra to work on OS X. When I run bin/cassandra, I get the following error:
~/apache-cassandra-incubating-0.4.1-src > bin/cassandra -f
Listening for transport dt_socket at address: 8888
Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
From what I could determine by searching, this error is related to incompatible versions of Java. However, as far as I can tell, I have the latest version of Java:
~/apache-cassandra-incubating-0.4.1-src > java -version
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03-211)
Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02-83, mixed mode)
~/apache-cassandra-incubating-0.4.1-src > javac -version
javac 1.6.0_13
~/Downloads/apache-cassandra-incubating-0.4.1-src > echo $JAVA_HOME
/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home
Any ideas on what I’m doing wrong?
The bad version number is almost always because you’ve compiled your java file to a class file with one version and are trying to run it with an earlier version.
You need to be certain the this “cassandra” is using the Java version you think it is. It’s not necessarily using the same one you get when running java from the command prompt.