Error when launching forge server (1.12.2)

[AdamThePig]

I've been trying to start up a forge server unsuccessfully. I'm using a Mac, and I've watched countless videos and read tutorials and followed their instructions, but forge doesn't seem to work. 

Strangely enough, the normal Minecraft server file works fine. But if I double-click the forge-universal.jar file nothing happens for ~10 seconds, then I get a message saying "The Java Jar File could not be launched. Check the console for errors."

I checked the console running the filter "jar", and every time I ran the forge file I received a notification in the console at the exactly when the error message popped up on my screen, roughly 10 seconds after I opened the file. The console notification:

"17:07:54.006305 -0700    Jar Launcher    LSExceptions shared instance invalidated for timeout."

I currently have no mods installed.

There is no log to upload!

Thanks for your time,

Adam

Edited March 18, 2018 by AdamThePig
Adding information

[Cadiboo]

I believe you have to create a start.command file with "java -Xmx1024M -Xms1024M -jar minecraft_server.jar" in it

Or you can also paste this into terminal.

java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui

 

minecraft_server.jar refers to the location of your server.jar file - you'll probably have to change this

if your using terminal you can type in java -Xmx1024M -Xms1024M -jar and then drag your server file into the terminal window

 

https://minecraft.gamepedia.com/Tutorials/Setting_up_a_Minecraft_Forge_server

 

You could also have incorrect java (minecraft & minecraft server require java)

 

Edited March 18, 2018 by Cadiboo

[larsgerrits]

13 hours ago, Cadiboo said:

I believe you have to create a start.command file with "java -Xmx1024M -Xms1024M -jar minecraft_server.jar" in it

That'll launch a vanilla Minecraft server. You need to launch the Forge JAR instead of the Minecraft server JAR.

[AdamThePig]

20 hours ago, Cadiboo said:

I believe you have to create a start.command file with "java -Xmx1024M -Xms1024M -jar minecraft_server.jar" in it

Or you can also paste this into terminal.

java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui

 

minecraft_server.jar refers to the location of your server.jar file - you'll probably have to change this

if your using terminal you can type in java -Xmx1024M -Xms1024M -jar and then drag your server file into the terminal window

 

https://minecraft.gamepedia.com/Tutorials/Setting_up_a_Minecraft_Forge_server

 

You could also have incorrect java (minecraft & minecraft server require java)

 

Unfortunately this didn't work. I've been able to get minecraft_server.jar to launch, both by opening the file and by using a start.command. The command I have previously used is:

#!/bin/bash
cd "$(dirname "$0")"
exec java -Xms1G -Xmx1G -jar minecraft_server.jar

The above command worked for the minecraft_server.jar but not for forge. I tried using your command but it didn't work for either normal or forge. I also tried using the command you advised in terminal, and that didn't work.

Edited March 18, 2018 by AdamThePig

[Cadiboo]

are you sure that your .jar file is called "minecraft_server.jar"?

 

What Java are you using?

[Cadiboo]

18 hours ago, larsgerrits said:

That'll launch a vanilla Minecraft server. You need to launch the Forge JAR instead of the Minecraft server JAR.

this will attempt to launch a file called minecraft_server.jar, you are able to rename files

and honestly you should not have both vanilla server & forge server in the same folder because they will attempt to access the same files, resulting in broken worlds etc.

Edited March 19, 2018 by Cadiboo

[TastyCake]

@Cadiboo Forge needs the vanilla server there aswell

Edited March 19, 2018 by TastyCake

[AdamThePig]

On 3/18/2018 at 2:47 PM, diesieben07 said:

Please clarify "didn't work".

Terminal said "Unable to access jar file minecraft_server.1.12.2.jar" when I either used the start.command file recommended by Cadiboo or when I pasted the code he/she suggested into terminal. At first I thought this was a naming error, but I checked several times and the file is still named "minecraft_server.1.12.2.jar". I'm a noob when it comes to coding servers, but I think at this point is was just an error in the code. I found other code online that worked with the normal server file but not the forge file, and the code Cadiboo gave me didn't work for either.

The code that worked for the normal server but not forge was:

#!/bin/bash
cd "$(dirname "$0")"
exec java -Xms1G -Xmx1G -jar minecraft_server.1.12.2.jar nogui

17 hours ago, Cadiboo said:

What Java are you using?

I'm using the latest version of Java (JDK) downloaded from Oracle, Java SE V9.0.4

17 hours ago, Cadiboo said:

this will attempt to launch a file called minecraft_server.jar, you are able to rename files

and honestly you should not have both vanilla server & forge server in the same folder because they will attempt to access the same files, resulting in broken worlds etc.

I changed the code so that it said "minecraft_server.1.12.2.jar", which is the name of my file.

As for the files being in the same place, I cannot find a single tutorial in which they put the two files in different places.

Edited March 20, 2018 by AdamThePig

[Cadiboo]

15 hours ago, diesieben07 said:

No, you are not. You should not touch the files created by the installer, they are named like they are for a reason.

The only file you may rename is the forge-universal jar.

you are unable to rename files in your file system? forge-universal.jar was the file I was (trying to be) talking about

 

 

Edited March 20, 2018 by Cadiboo

[Cadiboo]

14 hours ago, TastyCake said:

@Cadiboo Forge needs the vanilla server there aswell

Didn't know that, sorry for the salt

[Cadiboo]

@diesieben07 Would I be wrong to tell him to downgrade java to java 8?

[grievousdrop]

Did anyone get this error resolved? 

[Cedistic]

Still doesn't work. Anyone have a solution?

[DaemonUmbra]

Don't necro old threads, if you have an issue please make your own.