Re: Java 21 and virtual threads

[Felix Schumacher]

Am 04.05.23 um 14:37 schrieb Mark Thomas:

Hi all,



I think we have the following options:







I am currently leaning towards 3 but could live with 2.

The latest Java 21 EA build has moved virtual threads (from project Loom) out of preview. How do we want to handle this in Tomcat 11? Recall that Jakarta EE 11 has set Java 21 as the minimum version. 1. Stick with Java 17 as the minimum version and don't provide virtual thread functionality. 2. Stick with Java 17 as the minimum version and provide virtual thread functionality via the JreCompat module. 3. Increase minimum Java version to Java 21 for Tomcat 11 and provide virtual thread functionality.

Felix

+1 for option 3, as I think the possibility to try virtual threads outweighs the chances, that users willing to use Java 17 are note willing to use Java 21.

Thoughts? Other options?

Mark





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PS Option 3 will require updates to the CI systems - I am happy to take care of those. PPS I don't think all of the current Loom module will make it into Tomcat 11. I am currently thinking to pull in the Executor and then provide a boolean option for the existing endpoints to switch the internal executor to Loom.

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