Compatible Java Environments

The following tables provide information on the recommended Java Environment to use with your Talend product from February 2025 and later. If you are using Talend 8.0 products that were not patched nor updated with the February 2025 updates or later ones, see Compatible Java Environment before February 2025.

The supported Java platforms are OpenJDK and Oracle JDK. The recommended distribution for OpenJDK is Zulu.

Important: All Talend products and associated third-party applications, such as the Hadoop cluster, should use compatible Java versions. For Big Data Jobs specifically, note that the Job is built with Java 8 compliance in Talend Studio but executes with the Java version running on the target cluster. Before you install or upgrade any associated third-party application, Qlik recommends that you check which Java versions they support, and ensure your Routines compliance level is compatible.

Tip: For more information about upgrading your modules and artifacts to use the latest supported Java version, see Using a more recent version of Java.

In the following documentation:

Recommended: designates an environment recommended by Qlik based on experience and customer usage.
Supported: designates a supported environment for use with the listed component or service.
Supported with limitations: designates an environment that is supported by Qlik but with certain conditions explained in notes.

Supported Java versions for launching Talend Studio

Java version (OpenJDK or Oracle JDK)	Support type
21	Supported
17	Recommended

Supported Java versions for launching Talend Server modules

Talend Server Module	Java version (OpenJDK or Oracle JDK)	Support type
Talend Administration Center ¹ Talend JobServer Talend Identity and Access Management Talend Dictionary Service Talend SAP RFC Server Talend Data Preparation Talend Data Stewardship	17	Supported
Talend ESB (Application Integration) / Talend Runtime	17	Supported
Talend ESB (Application Integration) / Microservices	21 17	Supported Recommended
Talend LogServer	11 8	Supported

¹ To use Talend Administration Center with Java 17, you need to open the <tac_installation_folder>/apache-tomcat/bin/setenv.sh file and add the following commands:

# export modules
export JAVA_OPTS="$JAVA_OPTS --add-opens=java.base/sun.security.x509=ALL-UNNAMED  --add-opens=java.base/sun.security.pkcs=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/sun.security.action=ALL-UNNAMED -Dorg.talend.remote.jobserver.client.old=false"

JDK_JAVA_OPTIONS="$JDK_JAVA_OPTIONS --add-opens=java.xml/com.sun.org.apache.xml.internal.serialize=ALL-UNNAMED"

Note: The recommended Java environments for Big Data Distributions are OpenJDK 8 and Oracle JDK 8.

Supported Java versions for running Routes, Data Integration Jobs, and Data Service Jobs

All artifacts require at least Java 17 to build and execute in Talend Studio:

Data integration Jobs and Routes are built with Java 17 compliance.
Big Data Jobs are built with Java 8 compliance and with the add-opens parameters automatically included. Therefore, they can be executed with Java 17 in Talend modules, and with Java 8 in a big data cluster. In other words, the Job is launched with Java 17, then deployed in the cluster that runs in Java 8.
Third-party libraries that use Java 21 are not supported.

The Compiler Compliance Level corresponds to the Java version used for the Job code generation. For more information, see Setting up the Java version for Routines in Talend Studio.

The following tables show in which Java environments the corresponding items can be executed.

Supported Java versions to execute Data Integration Jobs
Java version for execution	Support type
21	Supported in Talend Studio
17	Supported Note that Routines compliance can be set up to Java 8 or 17.

Supported Java versions to execute Routes and Data Service Jobs
Java version for execution	Support type
21	Supported in Talend Studio
17	Supported

Supported Java versions for running Big Data Jobs in Big Data clusters

Big Data Jobs are built with Java 8 compliance in Talend Studio. The built artifacts include add-opens parameters to ensure compatibility with Java 17 runtimes in Talend environments. However, when deployed to a big data cluster, the Job executes with the Java version running on that cluster, not with the build Java version.

This build-once, run-anywhere model allows you to compile a Job once in Talend Studio with Java 8 compliance and deploy it to clusters running different Java versions. However, you must ensure the target cluster Java version is compatible with your Job's Routines.

Routines compliance can be set up to Java 8 or 17. The Routines compliance level must be compatible with the cluster's Java version. For more information, see Setting up the Java version for Routines in Talend Studio.

The following table shows recommended distributions and the Java versions they support for running Big Data Jobs and Spark applications. Choose the cluster distribution and Java version that matches your environment and Routines compliance level.

Big Data distributions and supported Java versions for Job execution
Distribution	Java version in cluster	Recommended Routines compliance	Support status
Hadoop 3.x	8	Java 8	Supported
Hadoop 3.x	11	Java 8 or 11	Supported
Cloudera CDH 6.x	8	Java 8	Supported
Cloudera CDH 6.x	11	Java 8 or 11	Supported
Spark 3.x (standalone cluster)	8 or 11	Java 8 or 11	Supported
Spark Structured Streaming	17	Java 17	Supported Note that Spark Structured Streaming requires Java 17 in the cluster. Ensure your Routines are compiled with Java 17 compliance before deploying to these environments.

Big Data Jobs execution compatibility examples

The following table shows example scenarios of Big Data Job deployment to different cluster environments.

Big Data Job execution compatibility scenarios
Cluster distribution	Cluster Java version	Routines compliance	Can execute?
Hadoop 3.x	8	Java 8	Yes
Hadoop 3.x	11	Java 8	Yes
Cloudera CDH 6.x	11	Java 17	No – Cluster does not support Java 17
Spark Structured Streaming	17	Java 17	Yes
Spark Structured Streaming	17	Java 8	No – Routines not compatible with cluster Java 17

Important: Always verify that your target cluster's Java version supports your Job's Routines compliance level. Use the compatibility table above to confirm support before deployment.

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