This problem will be fixed in the next release. It was indeed an issue with AccessController.doPrivileged as Marc had hypothesized below.
Thanks, Marc! On Thu, Jan 7, 2010 at 4:43 AM, Ftaylor <finbarrtay...@googlemail.com>wrote: > This problem still exists. > > On Dec 16 2009, 9:42 pm, polyurethan <vette...@googlemail.com> wrote: > > Hey there, > > > > I still get this ClassCastException. When will the JVM be fixed? > > It's Dec and the issue was raised in Jul. Is there any progress? > > > > Thanks, > > Alexander > > > > On Oct 22, 10:13 am, Marc Guillemot <mguille...@yahoo.fr> wrote: > > > > > > > > > Don, > > > > > I've tried to produce a unit test to open an issue for Jasper... and > failed. > > > > > I'm now quite sure that this is a bug in the JVM used for GAE. > > > > > The JavaDoc of AccessController.doPrivileged (which is a native method) > > > says that it propagates unchecked exceptions and throws a > > > PrivilegedActionException only if a *checked* exception was thrown. > > > Therefore Jasper code is correct not to await a RuntimeException as a > > > PrivilegedActionException can't contain a NullPointerException and > GAE's > > > JVM is buggy here. > > > > > Cheers, > > > Marc. > > > > > Don Schwarz a écrit :> Ah, you're right actually. I hadn't looked > closely enough at that bug. > > > > > > We'll have to get the Jasper guys to fix that and then upgrade. > > > > > > Thanks, > > > > Don > > > > > > On Mon, Oct 19, 2009 at 10:39 AM, Marc Guillemot < > mguille...@yahoo.fr > > > > <mailto:mguille...@yahoo.fr>> wrote: > > > > > > This seems to be a really old issue that relates to something > > > > different... or do you mean that GAE uses a 5 years old version > of > > > > Jasper? > > > > > > I've just look at the current sources of PageContextImpl > > > > > http://svn.apache.org/repos/asf/tomcat/trunk/java/org/apache/jasper/r... > > > > and it seems to me that the problem still exists there. > > > > > > Cheers, > > > > Marc. > > > > > > Don Schwarz a écrit : > > > > > Yes, this is: > > > > > > >https://issues.apache.org/bugzilla/show_bug.cgi?id=31171 > > > > > > > We need to bundle a later version of Jasper with the App > Engine > > > > SDK to > > > > > fix this. > > > > > > > On Mon, Oct 19, 2009 at 10:24 AM, Marc Guillemot > > > > <mguille...@yahoo.fr <mailto:mguille...@yahoo.fr> > > > > > <mailto:mguille...@yahoo.fr <mailto:mguille...@yahoo.fr>>> > wrote: > > > > > > > Hi, > > > > > > > any progress on this issue? > > > > > > > Is it possible that it comes from a bug in Jasper, not > able > > > > to recognize > > > > > RuntimeException occurring in a PrivilegedExceptionAction? > > > > > > > // org.apache.jasper.runtime.PageContextImpl > > > > > > > public void handlePageException(final Throwable t) throws > > > > IOException, > > > > > ServletException { > > > > > if (t == null) > > > > > throw new NullPointerException("null Throwable"); > > > > > > > if (SecurityUtil.isPackageProtectionEnabled()) { > > > > > try { > > > > > AccessController.doPrivileged( > > > > > new PrivilegedExceptionAction<Void>() { > > > > > public Void run() throws Exception { > > > > > doHandlePageException(t); > > > > > return null; > > > > > } > > > > > }); > > > > > } catch (PrivilegedActionException e) { > > > > > Exception ex = e.getException(); > > > > > if (ex instanceof IOException) { > > > > > throw (IOException) ex; > > > > > } else { > > > > > throw (ServletException) ex; <------ here? > > > > > } > > > > > } > > > > > } else { > > > > > doHandlePageException(t); > > > > > } > > > > > > > } > > > > > > > Cheers, > > > > > Marc. > > > > > > > Toby Reyelts a écrit : > > > > > > There's an outstanding issue in the version of Jasper > App > > > > Engine is > > > > > > currently using that can cause exceptions escaping a > JSP to be > > > > > > incorrectly cast to ServletException. As a temporary > > > > workaround, > > > > > you can > > > > > > wrap the body of your JSP in a try-catch block to get > the > > > > actual > > > > > exception. > > > > > > > > On Thu, Jul 30, 2009 at 1:13 PM, Blessed Geek > > > > > <blessedg...@gmail.com <mailto:blessedg...@gmail.com> > > > > <mailto:blessedg...@gmail.com <mailto:blessedg...@gmail.com>> > > > > > > <mailto:blessedg...@gmail.com > > > > <mailto:blessedg...@gmail.com> <mailto:blessedg...@gmail.com > > > > <mailto:blessedg...@gmail.com>>>> wrote: > > > > > > http://cuckooberra.blessed-are-the-geek.com/TableMgr/TableMgr.jsp > > > > > > > > Any idea what this error log means? LoggedIn.jsp is > a > > > > rather > > > > > simple > > > > > > jsp, getting a temp authtoken and exchanging it for > a > > > > > permanent one. > > > > > > My app runs fine on local eclipse plugin, but on > > > > deployment > > > > > this error > > > > > > resulted. > > > > > > > > 07-30 07:30AM 49.848 > > > > > > /TableMgr/LoggedIn.jsp > > > > > > java.lang.ClassCastException: > > > > java.lang.NullPointerException > > > > > cannot be > > > > > > cast to javax.servlet.ServletException > > > > > > at > > > > > > org.apache.jasper.runtime.PageContextImpl.handlePageException > > > > > > (PageContextImpl.java:754) > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > >--
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