I have done a new and fresh install of the forge server using the installer on my ubuntu 18.04 server. I just used the installer with the -installServer argument.
It installed everything but whenever i run the server i get these exceptions
daniele@daniele:~/forge$ java -Xmx1024M -Xms1024M -jar forge-1.14.4-28.0.45.jar nogui
[19:56:10.658] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 28.0.45, --fml.mcpVersion, 20190719.225934, --fml.mcVersion, 1.14.4, --fml.forgeGroup, net.minecraftforge, nogui]
[19:56:10.662] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 3.2.0+60+b86c1d4 starting: java version 11.0.4 by Ubuntu
[19:56:10.881] [main/INFO] [ne.mi.fm.lo.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[19:56:10.921] [main/WARN] [ne.mi.fm.lo.FMLConfig/CORE]: Configuration file /home/daniele/forge/config/fml.toml is not correct. Correcting
[19:56:10.925] [main/WARN] [ne.mi.fm.lo.FMLConfig/CORE]: Incorrect key [defaultConfigPath] was corrected from null to defaultconfigs
[19:56:11.209] [main/INFO] [STDERR/]: [jdk.nashorn.api.scripting.NashornScriptEngine:<init>:143]: Warning: Nashorn engine is planned to be removed from a future JDK release
[19:56:11.603] [main/INFO] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlserver' with arguments [--gameDir, ., nogui]
Exception in thread "main" [19:56:11.693] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: java.lang.RuntimeException: java.lang.UnsupportedOperationException
[19:56:11.694] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
[19:56:11.694] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:50)
[19:56:11.694] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:68)
[19:56:11.695] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:80)
[19:56:11.695] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
[19:56:11.695] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63)
[19:56:11.696] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60)
[19:56:11.696] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1050]: at net.minecraftforge.server.ServerMain.main(ServerMain.java:57)
[19:56:11.697] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: Caused by: java.lang.UnsupportedOperationException
[19:56:11.697] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassVisitor.visitNestMemberExperimental(ClassVisitor.java:248)
[19:56:11.697] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:651)
[19:56:11.698] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
[19:56:11.698] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:83)
[19:56:11.698] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.access$100(TransformerClassWriter.java:35)
[19:56:11.699] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter$SuperCollectingVisitor.visit(TransformerClassWriter.java:129)
[19:56:11.699] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:525)
[19:56:11.700] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
[19:56:11.700] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:83)
[19:56:11.700] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.access$100(TransformerClassWriter.java:35)
[19:56:11.701] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter$SuperCollectingVisitor.visit(TransformerClassWriter.java:129)
[19:56:11.701] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:525)
[19:56:11.701] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
[19:56:11.701] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:83)
[19:56:11.702] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.access$100(TransformerClassWriter.java:35)
[19:56:11.702] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter$SuperCollectingVisitor.visit(TransformerClassWriter.java:129)
[19:56:11.702] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:525)
[19:56:11.703] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
[19:56:11.703] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.computeHierarchy(TransformerClassWriter.java:83)
[19:56:11.703] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.getSupers(TransformerClassWriter.java:54)
[19:56:11.704] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformerClassWriter.getCommonSuperClass(TransformerClassWriter.java:99)
[19:56:11.704] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.SymbolTable.addMergedType(SymbolTable.java:1209)
[19:56:11.704] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.Frame.merge(Frame.java:1293)
[19:56:11.704] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.Frame.merge(Frame.java:1175)
[19:56:11.705] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.MethodWriter.computeAllFrames(MethodWriter.java:1604)
[19:56:11.705] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.MethodWriter.visitMaxs(MethodWriter.java:1540)
[19:56:11.705] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:807)
[19:56:11.706] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:687)
[19:56:11.706] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:436)
[19:56:11.706] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
[19:56:11.706] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:236)
[19:56:11.707] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:127)
[19:56:11.707] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:97)
[19:56:11.707] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
[19:56:11.708] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at java.base/java.lang.Class.forName0(Native Method)
[19:56:11.708] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at java.base/java.lang.Class.forName(Class.java:398)
[19:56:11.708] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:50)
[19:56:11.708] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[19:56:11.709] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1059]: ... 7 more
My java version is more or less up to date
java -version
openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3)
OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3, mixed mode, sharing)
as the normal vanilla server and many other java applications run without any problems. I've tried to re-install forge many times, or used already pre-packaged modpacks but nothing seems to work.
Also bear in mind i have not installed any plugins or mods just a fresh forge server install. Even the vanilla server that comes with forge starts and prompts me for the eula. but the forge server just keeps crashing. Even after eula acceptance.