Fix : WebSocketServer crashes when overridden methods throw Exceptions #1481

[marktech0813]

I found where the server invokes your overridden callbacks and added guards so exceptions from onOpen, onClose, and onError cannot crash the selector thread. I also wrapped onStart similarly. Lints are clean.

What I changed

• Guarded callback invocations in src/main/java/org/java_websocket/server/WebSocketServer.java:

• Wrap onOpen, onClose, onError, and onStart in try/catch.
• Log the exception and attempt to call onError(...); if onError itself throws, swallow and log to prevent propagation.

• Outcome: Exceptions thrown by your overrides no longer bubble up to the server’s run loop; the server continues accepting connections even if a “bad” client triggers user code exceptions.