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gessnerfl / fake-smtp-server

A simple SMTP Server for Testing purposes. Emails are stored in an in-memory database and rendered in a Web UI
Apache License 2.0
432 stars 90 forks source link

Minimum java version on #376

Closed amirAtWork closed 9 months ago

amirAtWork commented 9 months ago

On main page it reads "Note: You need Java 17 installed to run Fake SMTP Server." but I can't start with a later version.

[root@server system]# /opt/jdk-20.0.1/bin/java -XX:MaxRAMPercentage=90.0 -jar /opt/fake-smtp-server/fake-smtp-server-2.2.0.jar Exception in thread "main" java.lang.UnsupportedClassVersionError: de/gessnerfl/fakesmtp/Application has been compiled by a more recent version of the Java Runtime (class file version 65.0), this version of the Java Runtime only recognizes class file versions up to 64.0 at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1013) at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427) at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421) at java.base/java.security.AccessController.doPrivileged(AccessController.java:714) at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588) at org.springframework.boot.loader.net.protocol.jar.JarUrlClassLoader.loadClass(JarUrlClassLoader.java:104) at org.springframework.boot.loader.launch.LaunchedClassLoader.loadClass(LaunchedClassLoader.java:91) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:496) at java.base/java.lang.Class.forName(Class.java:475) at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:88) at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:53) at org.springframework.boot.loader.launch.JarLauncher.main(JarLauncher.java:58)

[root@server system]# /opt/jdk-20.0.1/bin/java -version openjdk version "20.0.1" 2023-04-18 OpenJDK Runtime Environment (build 20.0.1+9-29) OpenJDK 64-Bit Server VM (build 20.0.1+9-29, mixed mode, sharing)

gessnerfl commented 9 months ago

@amirAtWork indeed I missed to update the required Java version with the recent release 2.2.0. Starting with this release Java 21 is required. The README is now updated accordingly.