windows/linux Minecraft (Automatic Java Version - Multiple Mods)

[Joey Misfit]

@Dennis Is there a way I could set the column to not show from the code? If so could I pay you for a revision for it?

[Joey Misfit]

Hey @Dennis , 
With the latest version of modded minecraft I'm noticing this error;

C:\TCAFiles\Users\frankj\5585>java\jre8\bin\java.exe -Xmx5120M -Xms128M -jar paper-1.17.1-112.jar nogui 
Minecraft 1.17 requires running the server with Java 16 or above. Download Java 16 (or above) from https://adoptopenjdk.net/

The game config that you made is pointing to jre8 instead of jre16 and doesn't want to load the service, I've also tried installing jre16 locally on that machine without any luck. If you could please assist with this issue I'd greatly appreciate it.

[Dennis]

@Joey Misfit there should be a button called "Select Java Version" which allows you to specify which Java version you want the server to run with.
The new config downloads Java 8 and 16 and places them locally on the game service.

[Joey Misfit]

@DennisWhere would I find the option to select the java version on the panel, as now we are using the default theme and I don't see an option anywhere for that.

[Dennis]

Ah, I see that it's not included in the config I've uploaded here. Download the latest version.

What's New in Version 1.2.2  

This update might break things. Please test fully before using in production.
This will be the last update before I release a rewritten version of this config.

• Added ability to select Java version manually
• Java versions are now updated automatically using scheduled tasks
  • Clients can not manage these scheduled tasks
• Minor changes to how TCAdmin decides the version of Java to use

[Dennis]

What's New in Version 2.0.0  

Read before upgrading from version 1.x to 2.x!
This config has been more or less rewritten. Java is no longer required to be installed on the server as pre-built OpenJDK binaries will be downloaded directly to the service folder.
All modpacks have been removed from the "Mod manager" interface. This is done because we have expanded the Custom Mods module to include modpacks from FTB and CurseForge.

If you want to take advantage of the new Custom Mods module, please uninstall the module first (if your current TCAdmin version is older than 2.0.169.4). After the module has been uninstalled, perform a manual upgrade to 2.0.169.4 (this version has the module included by default): https://help.tcadmin.com/Updating#Manual_Update
Please note that 2.0.169.4 is a development build and might cause some issues. Use it at your own risk.

 

• [Added] Custom background images
• [Added] Reintroduced 'server-name' to show server name in TCAdmin
• [Added] Java 11 binaries
• [Improved] Automatic Java version detection.
  • TCAdmin will try to detect the required version of Java based on different things
    • If TCAdmin is unable to decide the correct version, it will default to Java 11
  • If OpenJDK doesn't exist in the service folder, it will fall back to environment variables (JAVA8, JAVA11 and JAVA16)*
  • If the environment variables doesn't exist, it will fall back to using the regular 'java' command
• [Added] Automatic OpenJDK update if OpenJDK binaries are installed locally
• [Added] Purpur Mod
• [Added] Tuinity Mod
• [Removed] All modpacks

Please note that things are not expected to work perfectly. It's a challenge to be able to detect the required Java version for all existing jars.
If you encounter any issues, please post them in the thread.

[Dennis]

What's New in Version 2.0.1  

• [New] TCAdmin now asks for Xmx and Xms values during setup
• [Fixed] Script for generating executable file
• [Improvement] Various bug fixes and improvements to scripts

[Dennis]

What's New in Version 2.0.2  

• [Fixed] Error when creating service

[HelixServices]

This is great. Although I have 1 issue. The openjdk is a RAM hog. Is there anyway to not use this or atleast make the ram usage minimal?

[Dennis]

You're able to use whatever variant of Java you'd like (read the section " Use system-installed Java versions instead of bundling Java with the game service ").

The issue is most likely not OpenJDK, though. I tested with multiple variants of Java and versions of Minecraft, and OpenJDK would often be the most efficient. The issue is rather that Minecraft 1.17 and newer uses a lot more RAM than previous versions did.

[HelixServices]

On 9/4/2021 at 12:38 PM, Dennis said:

You're able to use whatever variant of Java you'd like (read the section " Use system-installed Java versions instead of bundling Java with the game service ").

The issue is most likely not OpenJDK, though. I tested with multiple variants of Java and versions of Minecraft, and OpenJDK would often be the most efficient. The issue is rather that Minecraft 1.17 and newer uses a lot more RAM than previous versions did.

Oh interesting. Good info to know. 

[Ultrahost]

@DennisMate i get this error: Unknown column 'rcon_commands' in 'field list'

How can i fix it :)?

[Dennis]

@Ultrahost update TCAdmin.

You can also open the .xml file with Notepad and remove the following:

<rcon_commands>["whitelist on","whitelist off","seed"]</rcon_commands>

[Blizi]

Hello, I have the Problem that on my Windows Server the "Updates" Tab not available. When i for example install Paper (in the Mod Manager Tab) then comes the Message "Latest Paper version has been installed. To select a specific version, please go to "Updates".". But the Updates Tab is not existing. And when I get in the GameConfig, the Updates Tab is completely empty. Can anyone help me?

[Dennis]

Is that Linux or Windows?

Try importing the config again. You can choose to only import updates.

[kev60fps]

Hi, I've come across an issue with the RAM usage. Tried even with a fresh install of Minecraft Server and when starting server up it gets to 4GB or more.

My Xms is 1024M for the startup and maximum of XmX8192, any ideas? 
 

Regards, Kev

[Dennis]

@kev60fps what's the issue? You allow it to use 8GB of RAM, and it's using 4GB.

[kev60fps]

@Dennis Well the issue is that its starting with 1gb of ram and going to 5gb very fast. With no mods or players.

Edited September 18, 2021 by kev60fps

[Dennis]

That's not an issue with the config. That's just how Java and Minecraft works.

Newer versions of Minecraft uses a lot more RAM than older versions did.

 

The more RAM you assign to a program, the more RAM it will consume generally.
You can try starting the server outside of TCAdmin to verify that RAM usage is the same.

[Adam]

This is a good explination on how JVM works: https://plumbr.io/blog/memory-leaks/why-does-my-java-process-consume-more-memory-than-xmx

[kev60fps]

Alright, Thank you for your help!

[kev60fps]

@DennisI just gotta say after some testing and debugging i finally found it!

As you can see i lowered the Xmx and Xms to 512 and boom it worked. Server now runs from 512Mb and when players connect to it and server have to work at the same time ram goes up. Works like intended. And also you need to set the Memory Limit for each service since something is wrong with the config file of Minecraft. But this will doo for now. Just one question, Is it possible to remove the % so users dont get mind blown... 

 

Thanks!

[kev60fps]

And here is another server of mine that i implented the fix(Xmx and Xms is 512 ) and Ram Limit is 8Gb

 

[Dennis]

It doesn't matter what you set the RAM limit to in TCAdmin - unless you also set a value for virtual memory. If no value for virtual memory is set, the process will keep using virtual memory (page file).

TCAdmin will not be able to control the real memory usage of a Java application any better than you can control it outside of TCAdmin. It's just not possible due to the way heap size works.

[kev60fps]

Oh okay, Tested the commandlines on my local PC and it works with Xmx and Xms, so something must be wrong. Local MC server using less then 2GB but on TCAdmin is uses over 3GB or more.

These are the commandlines for both Local and TCAdmin: java -Xmx8192M -Xms1024M -jar server.jar

 

Local Setup: 

 

 

TCAdmin Setup: 

 

 

Server idle, no players or mods:

 

 

The task manager shows the exact same usage of Ram on the minecraft server.