Administration guide > Troubleshoot > Messages > SESN: Messages for the WebSphere eXtreme Scale HTTP Session manager
SESN0066E
SessionContext.responseAlreadyCommitted=SESN0066E: The response is already committed to the client. The session cookie cannot be set.
Explanation
The response is already committed to client so the session cookie cannot be sent to client.
User response
Correct the application to access the HTTP session before writing anything to the response.
Parent topic:
SESN: WebSphere eXtreme Scale messages for the WebSphere eXtreme Scale HTTP Session manager