sqlwbconsole.cmd: java.lang.NoClassDefFoundError: sun/misc/SignalHandler #103

schuchmann commented 2026年02月05日 10:26:03 +01:00

Hi,
I downloaded SQLWorkbenchJ 132 under Windows.
Executed download_jre.cmd and tried to run

c:\Workbench-Build132>sqlwbconsole.cmd
Fehler: Hauptklasse workbench.console.SQLConsole konnte nicht gefunden oder geladen werden
Ursache: java.lang.NoClassDefFoundError: sun/misc/SignalHandler

Java Version is:

c:\Workbench-Build132>.\jre\bin\java.exe --version
openjdk 21.0.6 2025年01月21日 LTS
OpenJDK Runtime Environment Temurin-21.0.6+7 (build 21.0.6+7-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.6+7 (build 21.0.6+7-LTS, mixed mode)

Anyone an idea?

(The GUI Version works)

Hi, I downloaded SQLWorkbenchJ 132 under Windows. Executed download_jre.cmd and tried to run ``` c:\Workbench-Build132>sqlwbconsole.cmd Fehler: Hauptklasse workbench.console.SQLConsole konnte nicht gefunden oder geladen werden Ursache: java.lang.NoClassDefFoundError: sun/misc/SignalHandler ``` Java Version is: ``` c:\Workbench-Build132>.\jre\bin\java.exe --version openjdk 21.0.6 2025年01月21日 LTS OpenJDK Runtime Environment Temurin-21.0.6+7 (build 21.0.6+7-LTS) OpenJDK 64-Bit Server VM Temurin-21.0.6+7 (build 21.0.6+7-LTS, mixed mode) ``` Anyone an idea? (The GUI Version works)

sql-workbench commented 2026年02月05日 15:16:28 +01:00

I do have an idea :)

This is a customized JRE, and when building it, I simply forgot to include the modules that are needed for the console version.

I will upload a new Windows JRE soon, until then I can only suggest the workaround to download a JRE manually from e.g.

https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.9%2B10/OpenJDK21U-jre_x64_windows_hotspot_21.0.9_10.zip

I do have an idea :) This is a customized JRE, and when building it, I simply forgot to include the modules that are needed for the console version. I will upload a new Windows JRE soon, until then I can only suggest the workaround to download a JRE manually from e.g. https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.9%2B10/OpenJDK21U-jre_x64_windows_hotspot_21.0.9_10.zip

schuchmann commented 2026年02月06日 11:18:47 +01:00

Thanks, with OpenJDK21U-jre_x64_windows_hotspot_21.0.9_10.zip it works!

Thanks, with [OpenJDK21U-jre_x64_windows_hotspot_21.0.9_10.zip](https://github.com/adoptium/temurin21-binaries/releases/download/jdk-21.0.9%2B10/OpenJDK21U-jre_x64_windows_hotspot_21.0.9_10.zip) it works!