Mac homebrew 1.2.0 "Unsupported major.minor version 51.0"

[AndreiRailean]

After updating elasticsearch with homebrew to 1.2.0 ES doesn't work. Doesn't look like a homebrew error. When switching back to 1.1.1 everything works fine.

elasticsearch --config=/usr/local/opt/elasticsearch/config/elasticsearch.yml
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/elasticsearch/bootstrap/Elasticsearch : 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)
    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)

[javanna]

Hi @AndreiRailean,
from 1.2 on we are not supporting Java 1.6 anymore. Looks like you just need to upgrade Java on your system. Also I'm not familiar with homebrew, not sure whether the java version requirement can somehow be specified somewhere.

[AndreiRailean]

At the time the error happened, I was running Version 7 Update 55.

[dadoonet]

I might be wrong, but I think you were using JAVA 1.6 before even if 1.7 was installed on your mac.
I mean that your path or Java home was not set correctly.

Installing a new version of Java actually fixed that.

Closing as you solved it.

[dadoonet]

Did you remove your comment where you wrote

Upgrading to Version 7 Update 60 fixed the problem

[AndreiRailean]

Upgrading to JRE 7.6 didn't do much. Had to get the JDK 7.6. Only with the new JDK could I start 1.2.0

[AndreiRailean]

Get JDK 7 update 60 here http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html

[uzbekjon]

Rather than installing JDK, it seem that you can simply define $JAVA_HOME variable and point it to your installation of Java 7. How and why I explained in the other issue comment.

[rianrainey]

@uzbekjon 👍

[murnieza]

@uzbekjon 👍

[macool]

@uzbekjon 👍