Unsupported Class Version Error in Talend Project on Production Server

nf8888 — Fri, 04 Apr 2025 09:58:13 GMT

Hello,

I am facing an issue when executing my Talend Studio project on our production server. It works fine locally, but on the server, I get the following error:

java.lang.UnsupportedClassVersionError: base/Val/VALUES has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0

It seems that the project was compiled with a newer version of Java than what is installed on the server. Unfortunately, I cannot upgrade the server to Java 17.

Could you please help me resolve this issue? Are there any solutions or configurations I can try to make the project work on the current server?

Thank you in advance for your assistance!

Re: Unsupported Class Version Error in Talend Project on Production Server

Denis_Segard — Thu, 17 Apr 2025 14:26:39 GMT

Hello,

If the Talend Studio patch level is >= R2025-02, the classes generated by the Studio have the "level" Java 17

https://community.qlik.com/t5/Official-Support-Articles/Qlik-Talend-Products-Java-17-Migration-Guide/ta-p/2439908

Qlik Talend Products: Java 17 Migration Guide

kind regards

Denis

topic Re: Unsupported Class Version Error in Talend Project on Production Server in Talend Studio

Unsupported Class Version Error in Talend Project on Production Server

Re: Unsupported Class Version Error in Talend Project on Production Server

Qlik Talend Products: Java 17 Migration Guidekind regards

Qlik Talend Products: Java 17 Migration Guide

kind regards