Installation error on Fedora

Technical Support & Bugs
1

I am getting the following error when I try to install VASSAL 3.6.19 on Fedora 38. The full text is:

Exception: java.lang.NoClassDefFoundError thrown from the UncaughtExceptionHandler in thread "main"

Running “java --version” in the terminal produces:

openjdk 17.0.7 2023-04-18
OpenJDK Runtime Environment (Red_Hat-17.0.7.0.7-4.fc38) (build 17.0.7+7)
OpenJDK 64-Bit Server VM (Red_Hat-17.0.7.0.7-4.fc38) (build 17.0.7+7, mixed mode, sharing)

Running “rpm -qa | grep openjdk” in the terminal produces:

java-17-openjdk-headless-17.0.7.0.7-5.fc38.x86_64
java-1.8.0-openjdk-headless-1.8.0.362.b09-2.fc38.x86_64
java-1.8.0-openjdk-1.8.0.362.b09-2.fc38.x86_64

I also have tried adding this to VASSAL.sh:

INSTALL_DIR=$(cd “$(dirname “$0”)”; pwd)

Thanks for any suggestions.

UPDATE: I also found this in the errorLog-3.6.19 file in ~/.VASSAL:

2023-07-01 01:08:16,610 [121906-main] ERROR VASSAL.tools.ErrorDialog - 
java.lang.UnsatisfiedLinkError: Can't load library: /usr/lib/jvm/java-17-openjdk-17.0.7.0.7-5.fc38.x86_64/lib/libawt_xawt.so

There is a libawt_headless.so and a libawt.so in that directory, but not a libawt_xawt.so.

2

You need to install the full version of the Java 11 (or later) JRE; it looks like you currently have the full version of Java 8 (which is too old for VASSAL later than 3.2.x) and a headless version of Java 17 (which lacks any ability to use graphics). I don’t know the details of using RPM packages, so I’ll leave that for you to figure out (I use Kubuntu, personally), or someone else might be able to help.

3

dnf install java-latest-openjdk will give you a full (headed) build of the current version of Java.

If you’d like Java 17 specifically, run dnf install java-17-openjdk instead.

(You might also need to run alternatives --config java after installing java, in order to select the version you just installed as the default.)

4

Works perfectly. Thanks!

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