Do not input private or sensitive data. View Qlik Privacy & Cookie Policy.
Skip to main content
Announcements
Qlik Connect 2025! Join us in Orlando join us for 3 days of immersive learning: REGISTER TODAY

Qlik Talend Data Integration: ESB Job fails to start with an error 'ClassNotFoundException: jak' after upgrading to Talend Studio R2025–03

No ratings
cancel
Showing results for 
Search instead for 
Did you mean: 
wei_guo
Support
Support

Qlik Talend Data Integration: ESB Job fails to start with an error 'ClassNotFoundException: jak' after upgrading to Talend Studio R2025–03

Last Update:

May 8, 2025 10:48:56 PM

Updated By:

Shicong_Hong

Created date:

May 8, 2025 10:49:48 PM

After upgrading to Talend Studio R2025-03, an ESB Job incorporating the tRestRequest component fails to start. During the deployment and start process, the following error was observed:

java.lang.ClassNotFoundException: jak

 

Cause

The issue arose due to the Talend Runtime (ESB) environment continuing to operate with an old version, specifically R2024-05, which lacks full compatibility with the newer Talend Studio R2025-03. The missing class (jak) indicates a discrepancy in the runtime libraries between Talend Studio and Talend Runtime container.

 

Resolution

Upgrade Talend Runtime (ESB) to version R2025-03, aligning it with Talend Studio version currently in use.

 

Environment

Contributors
Version history
Last update:
Thursday
Updated by: