More detail from Java 8 Update 60 console:
security: Expected Main URL: http://<server_name>/XMII/Classes/illum8.zip
basic: Plugin2ClassLoader.addURL parent called for http://<server_name>/XMII/Classes/illum8.zip
Missing Permissions manifest attribute in main jar: http://<server_name>/XMII/Classes/illum8.zip
security: Missing Codebase manifest attribute for: http://<server_name>/XMII/Classes/illum8.zip
security: Missing Application-Library-Allowable-Codebase manifest attribute for: http://<server_name>/XMII/Classes/illum8.zip