Is there any way to limit jersey-server-managed-async-executor thread pool size in helidon mp

[crmouli]

Need a way to limit jersey-server-managed-async-executor thread pool size in helidon mp

Environment Details

• Helidon Version:1.4.1
• Helidon MP
• JDK version: 1.8
• OS: ubuntu
• Docker version (if applicable):

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Problem Description

We are using AsyncResponse with helidon-mp and want to see if there is any performance improvement if we use same shared thread pool across the app. So want to know if there is a way to replace this jersey async thread pool.

Steps to reproduce

Start helidon-mp server and make any get request and see the thread count by connecting jvisualvm

[tomas-langer]

Related to #1540

[tomas-langer]

There seems to be one case where Jersey uses its own executor service that is not wrapped by a Helidon one, so we lose track of Context.

[tomas-langer]

The PR (one for master will follow shortly) adds support to configure the managed async executor service.
You can configure both the default and async executor services through the usual configuration mechanisms, example using META-INF/microprofile-config.properties:

# configure custom prefix for Jersey executor service (server)
server.executor-service.thread-name-prefix=jersey-
# configure custom prefix for Jersey async executor service (server)
server.jersey.async-executor-service.thread-name-prefix=jersey-async

For all configurable options see: https://helidon.io/docs/latest/apidocs/index.html?overview-summary.html