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"Could not find or load main class @user_jvm_args.txt" when launching forge server.


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  • OS: Ubuntu 20.04
  • Java: openjdk-17-jre
  • Error message: Could not find or load main class @user_jvm_args.txt


Hey, my forge server wont launch anymore through the run.sh script after a sudden rootserver outage and reboot.

I tried force-reinstalling the openjdk but that didn't seem to solve the issue. Any suggestions on how to get the forge server back running?

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3 minutes ago, diesieben07 said:

That error message is indicate of a wrong Java version. Java 17 is needed for 1.18.

Just to clear that up, the forge server was running fine for days until that outage happend.

Printing java -version outputs:

openjdk version "1.8.0_312"
OpenJDK Runtime Environment (build 1.8.0_312-8u312-b07-0ubuntu1~20.04-b07)
OpenJDK 64-Bit Server VM (build 25.312-b07, mixed mode)


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6 minutes ago, diesieben07 said:

Well, Java 17 is required for 1.18.

Not the type of help i expected but installing the oracle-java17-installer and oracle-java17-set-default packages solved the issue. Still doesn't explain why it worked before with the openjdk.

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  • 5 months later...

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