UndeclaredThrowableException on any command

[greatvovan]

Trying to use the tool on a Databricks cluster (driver machine). Getting

# java -jar jmxterm-1.0.4-uber.jar -v verbose
Delete /root/.jmxterm_history if you encounter error right after launching me.
Welcome to JMX terminal. Type "help" for available commands.
$>jvms
java.lang.reflect.UndeclaredThrowableException
        at jdk.proxy2/jdk.proxy2.$Proxy6.getAllVirtualMachines(Unknown Source)
        at org.cyclopsgroup.jmxterm.jdk6.Jdk6JavaProcessManager.list(Jdk6JavaProcessManager.java:44)
        at org.cyclopsgroup.jmxterm.cmd.JvmsCommand.execute(JvmsCommand.java:24)
        at org.cyclopsgroup.jmxterm.cc.CommandCenter.doExecute(CommandCenter.java:161)
        at org.cyclopsgroup.jmxterm.cc.CommandCenter.doExecute(CommandCenter.java:134)
        at org.cyclopsgroup.jmxterm.cc.CommandCenter.execute(CommandCenter.java:176)
        at org.cyclopsgroup.jmxterm.boot.CliMain.execute(CliMain.java:149)
        at org.cyclopsgroup.jmxterm.boot.CliMain.main(CliMain.java:41)
Caused by: java.lang.IllegalAccessException: class org.cyclopsgroup.jmxterm.utils.WeakCastUtils$2 cannot access class sun.tools.jconsole.LocalVirtualMachine (in module jdk.jconsole) because module jdk.jconsole does not export sun.tools.jconsole to unnamed module @24e72f73
        at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:392)
        at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:674)
        at java.base/java.lang.reflect.Method.invoke(Method.java:561)
        at org.cyclopsgroup.jmxterm.utils.WeakCastUtils$2.invoke(WeakCastUtils.java:136)
        ... 8 more
$>

on any command except help.

Ubuntu 24.04.3 LTS 5.15.0-1091-azure
openjdk 17.0.16 2025-07-15 LTS
OpenJDK Runtime Environment Zulu17.60+17-CA (build 17.0.16+8-LTS)
OpenJDK 64-Bit Server VM Zulu17.60+17-CA (build 17.0.16+8-LTS, mixed mode, sharing)

Any advice is appreciated.

[nyg]

I don't have access to a computer right now but this looks like a bug that was fixed recently in the main branch.

[greatvovan]

Thanks for the info. I'll be able to test once there's a release.

[nyg]

If you want, there is a more active fork with more recent releases: https://github.com/LeMyst/jmxterm.