[jira] [Created] (CASSANDRA-6189) Usability: Unable to start cassandra server & unable to join mailing list.(Documentation Fix)

["Deepak Kumar V (JIRA)" <ji...@apache.org>]

Deepak Kumar V created CASSANDRA-6189:
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             Summary: Usability: Unable to start cassandra server & unable to join mailing list.(Documentation Fix)
                 Key: CASSANDRA-6189
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6189
             Project: Cassandra
          Issue Type: Bug
         Environment: apache-cassandra-2.0.1
java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)
Linux ubuntu 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
            Reporter: Deepak Kumar V


I am new user of Cassandra, starting today.

1) I am unable to join cassandra user mailing list.
   a)I did not get any response from user-subscribe@cassandra.apache.org
   b)  Does it take really long to get subscribed ?
2) I was not able to run Cassandra server on environment described above.
Exception:
 bin/cassandra -f 
xss =  -ea -javaagent:bin/../lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms2932M -Xmx2932M -Xmn600M -XX:+HeapDumpOnOutOfMemoryError -Xss256k
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/cassandra/service/CassandraDaemon : Unsupported major.minor version 51.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
	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)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
Could not find the main class: org.apache.cassandra.service.CassandraDaemon.  Program will exit.


I was not able to find any solution for this in user mail archives.  

User documentation(Getting started) can be updated (FAQ) with solution of above common error.

If this is not the right place, please re-direct. 



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