cxhttt233 opened a new issue, #8248: URL: https://github.com/apache/hop/issues/8248
### Apache Hop version? 2.20.0-SNAPSHOT-20260903 ### Java version? 21 ### Operating system Docker ### What happened? This error was encountered during normal Hop Web use. The code analysis below was assisted by Codex and the suspected cause still needs confirmation. On Hop Web "2.20.0-SNAPSHOT-20260903", the server log repeatedly shows: ERROR: Error calling extension point 'GetFieldsExtension' java.lang.NullPointerException: Cannot invoke "org.eclipse.rap.rwt.service.UISession.getAttribute(String)" because "uiSession" is null "TestingGuiPlugin.getCurrentUnitTest()" currently uses "Display.getCurrent() == null" as a guard before accessing GUI state. However, in RAP, "Display.getCurrent()" itself resolves the session display and can reach "uiSession.getAttribute(...)". If a service context exists without a valid "UISession", the guard itself may throw this NPE. This looks like a remaining Hop Web/RAP edge case related to #7896 / #7897. Observed on "apache/hop-web:2.20.0-SNAPSHOT-20260903", Java 21, Docker/Linux ARM64. Related: #7896, #7897 ### Issue Priority Priority: 3 ### Issue Component Component: Hop Web -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
