WebSocket 1005 No Status Received vs 1011 Internal Error
Both WebSocket 1005 (No Status Received) and 1011 (Internal Error) belong to the WebSocket Close Codes category. 1005 indicates 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. Meanwhile, 1011 means that the server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request.
설명
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.
이 코드를 보게 되는 경우
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.
해결 방법
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.
설명
The server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request.
이 코드를 보게 되는 경우
The server hit an unhandled exception or crashed while processing a WebSocket message. This is the WebSocket equivalent of HTTP 500 Internal Server Error.
해결 방법
Check the server-side application logs for stack traces and exceptions. Fix the underlying bug that caused the crash and add proper error handling around message processing.
주요 차이점
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.
WebSocket 1011: The server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request.
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.
You encounter 1011 when the server hit an unhandled exception or crashed while processing a WebSocket message. This is the WebSocket equivalent of HTTP 500 Internal Server Error.
언제 어떤 것을 사용할지
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. For 1011 (Internal Error): Check the server-side application logs for stack traces and exceptions. Fix the underlying bug that caused the crash and add proper error handling around message processing.