Installing Spring Boot Applications

Question

I installed the spring Boot Application as described in https://docs.spring.io/spring-boot/docs/current/reference/html/deployment-install.html

After installation,

service {myApp} start

does not work at all.

> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org / springframework / boot / loader / JarLauncher: Unsupported
> major.minor version 52.0

In making this exception, I checked all the environment variables and confirmed that everything was normal. The spring application registered as a service did not work and

/etc/init.d/{myApp} start

found a normal operation while searching for other methods. I do not know at all whether I can not run as a service because I do not have enough points. Please let me know if you know anyone.

I have the similar issue, If I use `service {myApp} start`, I got the same error message, but If I use `/etc/init.d/{myApp} start`, then it's ok. — Donghua Liu, Nov 14 '19 at 01:42

score 1 · Answer 1 · answered Dec 11 '18 at 13:20

1

You compiled your application with java 8 so you need to run it using at least a java 8 version (major.minor version 52.0) , but you are using a previous JVM version.

You can check the actual version with the command:

java -version

And here are the references to all versions:

Java SE 10 = 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java SE 6.0 = 50
Java SE 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45

answered Dec 11 '18 at 13:20

Davide Lorenzo MARINO

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It was not a problem with java version, but the problem was that JDK was not installed in the global. After JAVA PATH is installed globally, it works normally. – 원일준 Nov 15 '19 at 02:07

Installing Spring Boot Applications

1 Answers1