WebSocket 1000 Normal Closure vs 1005 No Status Received
Both WebSocket 1000 (Normal Closure) and 1005 (No Status Received) belong to the WebSocket Close Codes category. 1000 indicates that the connection has been closed cleanly, meaning the purpose for which it was established has been fulfilled. Both endpoints agree the session is complete. Meanwhile, 1005 means that a reserved value that indicates no status code was present in the Close frame. This code must not be set by an endpoint when sending a Close frame.
Descripción
The connection has been closed cleanly, meaning the purpose for which it was established has been fulfilled. Both endpoints agree the session is complete.
Cuándo lo verás
The WebSocket connection closed gracefully after both sides finished exchanging data. This is the expected close code for a successful session.
Cómo solucionarlo
No fix needed — this indicates everything worked as intended. If you did not expect the connection to close, check your application logic for premature close() calls.
Descripción
A reserved value that indicates no status code was present in the Close frame. This code must not be set by an endpoint when sending a Close frame.
Cuándo lo verás
The peer closed the connection with a Close frame that contained no status code payload. Your WebSocket library surfaces 1005 as a sentinel to indicate the absence of a code.
Cómo solucionarlo
This is an internal indicator, not a wire protocol value. If you see it frequently, the remote peer may have a bug where it sends empty Close frames — check the peer's implementation.
Diferencias clave
WebSocket 1000: The connection has been closed cleanly, meaning the purpose for which it was established has been fulfilled. Both endpoints agree the session is complete.
WebSocket 1005: A reserved value that indicates no status code was present in the Close frame. This code must not be set by an endpoint when sending a Close frame.
You encounter 1000 when the WebSocket connection closed gracefully after both sides finished exchanging data. This is the expected close code for a successful session.
You encounter 1005 when the peer closed the connection with a Close frame that contained no status code payload. Your WebSocket library surfaces 1005 as a sentinel to indicate the absence of a code.
Cuándo usar cada uno
For 1000 (Normal Closure): No fix needed — this indicates everything worked as intended. If you did not expect the connection to close, check your application logic for premature close() calls. For 1005 (No Status Received): This is an internal indicator, not a wire protocol value. If you see it frequently, the remote peer may have a bug where it sends empty Close frames — check the peer's implementation.