Eclipse Error while launching Katalon App

Web Testing
1

There was a Pending update for Katalon, which I executed and after that I am not able to even log into the application. I am getting this error pop-up when I try to launch the app :

image
image421Ă—165 6.53 KB

Check that folder path, I see this in the logs :

!SESSION 2025-12-17 16:59:01.033 -----------------------------------------------
eclipse.buildId=unknown
java.version=17.0.13
java.vendor=Eclipse Adoptium
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86_64

!ENTRY org.eclipse.osgi 4 0 2025-12-17 16:59:01.552
!MESSAGE Bundle reference:file:org.eclipse.equinox.simpleconfigurator_1.5.300.v20240424-1301.jar not found.

!ENTRY org.eclipse.osgi 4 0 2025-12-17 16:59:01.580
!MESSAGE Application error
!STACK 1
java.lang.IllegalStateException: Unable to acquire application service. Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini).
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:86)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:439)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:271)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:668)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:605)
at org.eclipse.equinox.launcher.Main.run(Main.java:1481)

Would someone be able to assist with this ASAP ? I tried downloading Eclipse but there was a 404 error trying to do that.

Thanks,

Sheela Ramji.

2 Likes
2

You’re experiencing a corrupted Katalon Studio installation after a pending update. The error logs show:

  • Missing Eclipse bundle: org.eclipse.equinox.simpleconfigurator_1.5.300.v20240424-1301.jar
  • Application startup failure: Unable to acquire application service

This indicates the update process corrupted critical configuration files, likely due to incomplete download or extraction.

Root Cause

Confirmed Issue: Update-related corruption of Katalon Studio’s Eclipse/OSGi configuration files. This is a known issue that occurs when:

  • The update download is interrupted or incomplete
  • Configuration metadata becomes corrupted during the update process
  • The .metadata folder contains broken references

Solutions

Solution 1: Clean Configuration Files (Recommended First Step)

Step-by-step instructions:

  1. Locate your Katalon installation folder (e.g., C:\Users\<username>\Katalon Studio Windows_64-X.X.X)

  2. Delete the corrupted metadata folder:

    • Navigate to: <Katalon Installation Folder>\config\.metadata
    • Delete the entire .metadata folder

  3. Delete the application properties file:

    • Navigate to: %userprofile%\.katalon (this is C:\Users\<username>\.katalon)
    • Delete the application.properties file

  4. Restart Katalon Studio by double-clicking katalon.exe

Source: Katalon Documentation - Unable to open the Katalon Studio application

Solution 2: Complete Reinstall (If Solution 1 Fails)

If cleaning the configuration files doesn’t work, perform a clean reinstall:

  1. Uninstall Katalon Studio completely:

    • Delete the entire Katalon installation folder
    • Delete %userprofile%\.katalon folder

  2. Download a fresh copy:

  3. Extract and install:

    • Extract the .zip file to C:\Users\<username> folder
    • Double-click katalon.exe to launch

Important Note: The in-app update function has known issues when upgrading between major versions (e.g., 8.x to 9.0.0). For major version upgrades, always download a fresh copy from the Katalon website rather than using the in-app updater.

Source: Katalon Documentation - Update Katalon Studio

Additional Notes

:warning: About the 404 Error on Eclipse Download: You don’t need to download Eclipse separately. Katalon Studio includes all necessary Eclipse components. The error you encountered was likely from an incorrect URL or a third-party source.

:white_check_mark: After Successful Launch: Once Katalon Studio opens, you’ll need to reactivate your Enterprise Trial license.

Try Solution 1 first - it resolves most post-update issues. If that doesn’t work, proceed with Solution 2 (complete reinstall). Let me know if you encounter any issues!

3

Install a fresh Katalon Studio in a new folder
Ensure you have full read/write permissions on the Katalon installation directory before updating

1 Like
4

Install the latest version of Katalon Studio and try again.

1 Like