I've installed Graylog using the instructions on the Graylog website:
$ sudo rpm -Uvh
https://packages.graylog2.org/repo/packages/graylog-2.0-repository_latest.rpm
$ sudo yum install graylog-server
I attempt to start the server with:
$ sudo service graylog-server start
This gives the error:
Exception in thread "main" java.lang.UnsupportedClassVersionError:
org/graylog2/bootstrap/Main : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
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$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at
sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
This error indicates that it requires a JRE 8.
The documents I can find indicate that Graylog 2 should work with Java 7.
* Is the documentation right, and this was a failure in the release process?
* Is there a Java 7 specific build I need to install?
* Is the documentation wrong, and does Graylog now require Java 8?
* Do I need to Graylog 2 from source using Java 7?
-jeff
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