TIBCO DataSynapse GridServer 7.1.0 HF-08 supports  Oracle Java 21.0.6 per the readme file. Hence, we also support Azul JDK 21.0.6 with GS 7.1.0 HF-08.

As per the GS 7.1.0 HF-08 readme file, the same changes are required to be done on the Engine & Driver side : 
For Engine, the customer can create an Azul Java 21.0.6 grid library similar to Oracle JDK shipped with HF-08 and deploy it to the Director UI > Services > Grid Libraries.

To run the engine on Azul Java 21, perform the following steps:
1. Add the JVM parameter under Grid components -> Engine -> Engine Configurations. Select the engine configuration file based on the operating system.
2. Update 'Command-line Arguments' with '--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED' under 'Engine JVM'.
Note: The above 'Command-line Arguments' parameter is only necessary for Java version 17 and above, and it should not be added for lower Java versions, such as Java 8 and Java 11.
 
For Driver :
To run the Java driver using Azul Java 21, add the following parameter as a JVM argument:
'--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED'
 
For reference, check the adder service example at GridServerSDK-Windows\examples\service\adderunJava.bat.

TIBCO DataSynapse GridServer 7.1.0 HF-08 supports Azul JDK 21.0.6.

https://support.tibco.com/external/article/138440/gridserver-710-hotfix08-has-been-release.html