I am migrating my Server from Tomcat-6 to Tomcat-9. My website is designed for the protocol of HTTP/1.1 . The server.xml file contains the Connector Protocol of org.apache.coyote.http11.Http11NioProtocol . The server starts up normally without generating any errors. However, when I try to access my website using localhost, I get the following error :-
INFO [https-nio-8445-exec-3] org.apache.tomcat.util.http.parser.Cookie.logInvalidHeader A cookie header was received [ 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 21, 22, 23]; userId=53136] that contained an invalid cookie. That cookie will be ignored.Note: further occurrences of this error will be logged at DEBUG level.
Can anyone please tell me the reason for this error? What causes an invalid cookie? Can this error be avoided if I use a different connector?