WebSocket
1009 Message Too Big
An endpoint is terminating the connection because it received a message that is too large for it to process.
When You See This Code
The message payload exceeded the server's configured maximum frame or message size limit. Common when uploading large files or sending huge JSON payloads over WebSocket.
How to Fix
Reduce the message size by chunking large payloads into smaller frames. Alternatively, increase the server's max message size configuration if the large payload is expected.