Quick test in EC2 before running on VM at home

Other Devices & Integrations Voice Assistants
#1

Running on CentOS7 ec2 instance

java version “1.7.0_131”
OpenJDK Runtime Environment (rhel-2.6.9.0.el7_3-x86_64 u131-b00)
OpenJDK 64-Bit Server VM (build 24.131-b00, mixed mode)

[ec2-user@ip-xxxxxx ~]$ java -jar ConciergeServer.jar
Exception in thread “main” java.lang.UnsupportedClassVersionError: com/rtsservic es/conciergeserver/ConciergeServer : 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:14 2)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:442)
at java.net.URLClassLoader.access$100(URLClassLoader.java:64)
at java.net.URLClassLoader$1.run(URLClassLoader.java:354)
at java.net.URLClassLoader$1.run(URLClassLoader.java:348)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:347)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

Selection Command

*+ 1 java-1.7.0-openjdk.x86_64 (/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.131-2.6.9.0.el7_3.x86_64/jre/bin/java)

Is there a specific Java version we should be running?
Runtime or SDK?

Thanks
Nick

#2

I think i got it working:
There are 2 programs which provide ‘java’.

Selection Command

*+ 1 java-1.7.0-openjdk.x86_64 (/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.131-2.6.9.0.el7_3.x86_64/jre/bin/java)
2 /usr/java/jre1.8.0_60/bin/java

Enter to keep the current selection[+], or type selection number: 2
[root@ip-xxx habridge]# sudo update-alternatives --config java

There are 2 programs which provide ‘java’.

Selection Command

  • 1 java-1.7.0-openjdk.x86_64 (/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.131-2.6.9.0.el7_3.x86_64/jre/bin/java)
  • 2 /usr/java/jre1.8.0_60/bin/java

Enter to keep the current selection[+], or type selection number:
[root@ip-xxxxx habridge]# java -jar /home/ec2-user/ConciergeServer.jar
May 4, 2017 9:56:28 AM V:InstallManager:OS:Linux

Just now need to test it on a VM at home.

#3

Yes, this needs Java 1.8 … I updated the Documentation yesterday morning.