Prior to JDK 8u261, the JSSE framework passed an array of Strings of all keytypes in one call to the (delegate) javax.net.ssl.X509KeyManager.chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) implementation when client authentication is present in an application. Since JDK 8u261, the internal JDK libraries may call the delegate `javax.net.ssl.X509KeyManager.chooseClientAlias` method in multiple iterations while performing client authentication. One key type per call.