FULL PRODUCT VERSION : 1.7.0_06 1.7.0_07 ADDITIONAL OS VERSION INFORMATION : Windows Vista Windows 7 Windows 8 A DESCRIPTION OF THE PROBLEM : If there is a cached version of a requested jar file for an applet, the java plugin makes a request to the web server for a jar.pack.gz file, which will not exist in most cases. If the web server does not respond Status-not-found but Status-multiple-choices, the plugin does not start the java applet at all. REGRESSION. Last worked in version 6u31 STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : Please consider the following java applet for example: http://www.schulphysik.de/java/physlet/applets/truckrace.html If one loads the java applet for the first time, everything works fine. And this is the network recording: HTTP:Request, GET /java/physlet/classes/Animator4_.jar HTTP:Response, HTTP/1.1, Status: Ok Now, the jar file is in the cache. Now, close the browser and try to open it again. Now, the applet does not start. This is the network recording: GET /java/physlet/classes/Animator4_.jar.pack.gz HTTP:Response, HTTP/1.1, Status: Multiple choices For some reason, the plugin now tries to request a jar.pack.gz file, which does not exist, instead of the jar file. Now, if the web server is configered not to respond with a Status-not-found but with a Status-multiple-choices, then the java plugin does neither load the correct jar file nor uses the cached version. If, however, the webserver would respond with a Status-not-found then the plugin uses the cached jar file. EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - If there is a cached version of a jar file, the java plugin should make a correct request to the web server to check if it is outdated. The java plugin should not change "example.jar" to "example.jar.pack.gz". Or if this is a standard behaviour, the plugin should handle Status-multiple-choices replies correctly. ACTUAL - The java plugin makes a request for "example.jar.pack.gz" instead of "example.jar" and does not handle the web server response "Status-multiple-choices" correctly. ERROR MESSAGES/STACK TRACES THAT OCCUR : * SecurityException: Illegal URL redirect * ClassFormatError: Incompatible magic value 1008813135 in class... (this is the beginning of the multiple-choice response <!DO ...) * ClassNotFoundException: ... REPRODUCIBILITY : This bug can be reproduced always. ---------- BEGIN SOURCE ---------- http://www.schulphysik.de/java/physlet/applets/truckrace.html ---------- END SOURCE ---------- CUSTOMER SUBMITTED WORKAROUND : If you clear the java cache, then the applet will start correctly for one time. (The next time the applet is in the cache again, ...)
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