Communication error: Invalid JSON from server: 1|X

[tomas.klems (Tomáš Klemš)]

I have the same problem.
It happens only in PROD on AWS EC2 instance… So there is a proxy 8080:5000, it might be related.

See this for details:

More than one Servlet Mapping defined || Storing non-serializable bean

@gorelov @krivopustov Hello guys, I dont think that it is harmless. It is OK in DEV. No problem ever. But in PROD on AWS EC2 AL2023 instance the problems begun… At the same monment: UI: Communication problem Pay attention to any unsaved data, and click here to continue. Invalid JSON from server: 1|X WebDeveloper Tools Console in Edge: vaadinPush.js?v=8.14.3-4-jmix:1 Websocket closed, reason: Connection was closed abnormally (that is, with no close frame being …

IMHO it is all related:

1. Invalid JSON from server: 1|X
2. Websocket closed, reason: Connection was closed abnormally (that is, with no close frame being sent). - wasClean: false
3. org.atmosphere.util.IOUtils : More than one Servlet Mapping defined. WebSocket may not work org.apache.catalina.core.ApplicationServletRegistration

I think they should not suppress the warning in GitHub issue .

Thank you.
T