Vaadin Push Client stuck if Push annotation is used in OpenLiberty with Turkish Localization

Description of the bug

When I set push annotation @Push(value = PushMode.AUTOMATIC, transport = Transport.LONG_POLLING) as Long Polling or WEBSOCKET, in the browser FlowClient sends request infinitely.

Even though it is set to LONG_POLLING, Flow client is using Atmosphere library to send request.

Also in the Javascript console FlowClient logs re-opening push connection infinitely.

Expected behavior

It should send request with an interval. Should not stuck at infinite loop. Maybe do not use the atmosphere library if transport method is set to LONG_POLLING.

Minimal reproducible example

See https://github.com/abdullahtellioglu/openliberty-push-example and run mvn clean install liberty:dev to create a reproducible example. Open the url http://localhost:9080/push/ and open the network tab in development tool.

Versions

• Vaadin / Flow version: 23.1.2
• Java version: 11
• OS version: MacOS Monterey 12.4
• Browser version (if applicable):
• Application Server (if applicable): OpenLiberty 22.0.0.7, also OpenLiberty 19.0.0.12
• IDE (if applicable):

[Artur-]

Turkish locale issues are most often caused by using toLowerCase without specifying an English locale to convert an I to i and you end up with a Turkish i instead. When matching for fields/methods/headers/cookies it then fails at some point because the expected key is not found

[abdullahtellioglu]

The problem is happening if locale is set Turkish in JVM options. If JVM property is set -Duser.language=tr and create a js bundle, this bug is happening.