Same error, syncing the JARs has not helped. :(
It appears to me there's still hiding one incompatible (Jasper?)
library somewhere.

I guess I just have bad luck. Every time I upgrade GAE/GWT Eclipse
plugin or SDK I end up doing clean install of Eclipse. :(

On Dec 5, 7:36 pm, Rajeev Dayal <[email protected]> wrote:
> Hi,
>
> If you navigate to Project Properties -> Google -> Web Application, do you
> have the option "Launch and deploy from this directory" checked? If so, when
> you switched SDKs on your project, the Google Plugin for Eclipse should have
> copied over the new libraries from the SDK over to your war/WEB-INF/lib
> directory.
>
> Have you manually copied/modified/removed any of the App Engine-related
> libraries in the war/WEB-INF/lib folder? If so, then the Google Plugin for
> Eclipse will not overwrite those changes on an SDK switch. What will happen
> is that when switching SDKs, a warning will appear in the problems view,
> indicating that there is a mismatch between the SDK jars and those in your
> war/WEB-INF/lib folder. By selecting the warning and hitting CTRL-1, you'll
> be given the option to synchronize the jars in the new SDK with the jars in
> war/WEB-INF/lib.
>
> Rajeev
>
>
>
>
>
>
>
> On Fri, Dec 3, 2010 at 9:30 PM, GoSharp Lite <[email protected]> wrote:
> > I have just upgraded Eclipse Galileo with AppEngine version 1.4.0.
> > There seems to be a mismatch of Tomcat versions between pre-
> > compilation and execution.
>
> > Does anyone have a solution with jsp compilation issue?
>
> > Local server shows below logs with SDK 1.4.0 -
> > HTTP ERROR 500
>
> > Problem accessing /. Reason:
> > Unable to compile class for JSP:
>
> > An error occurred at line: -1 in the generated java file
> >    [javac] D:\Profiles\LOCALS~1\Temp\Jetty_0_0_0_0_8888_war____masbuh
> > \jsp\org\apache\jsp\GoChildWeb_jsp.java:8:
> > org.apache.jsp.GoChildWeb_jsp is not abstract and does not override
> > abstract method getDependants() in
> > org.apache.jasper.runtime.JspSourceDependent
> >    [javac] public final class GoChildWeb_jsp extends
> > org.apache.jasper.runtime.HttpJspBase
> >    [javac]              ^
>
> > An error occurred at line: -1 in the generated java file
> >    [javac] D:\Profiles\LOCALS~1\Temp\Jetty_0_0_0_0_8888_war____masbuh
> > \jsp\org\apache\jsp\GoChildWeb_jsp.java:18: getDependants() in
> > org.apache.jsp.GoChildWeb_jsp cannot implement getDependants() in
> > org.apache.jasper.runtime.JspSourceDependent; attempting to use
> > incompatible return type
> >    [javac] found   : java.lang.Object
> >    [javac] required: java.util.List
> >    [javac]   public Object getDependants() {
> >    [javac]                 ^
>
> > An error occurred at line: -1 in the generated java file
> >    [javac] D:\Profiles\LOCALS~1\Temp\Jetty_0_0_0_0_8888_war____masbuh
> > \jsp\org\apache\jsp\GoChildWeb_jsp.java:23: cannot find symbol
> >    [javac] symbol  : method
> > getJspApplicationContext(javax.servlet.ServletContext)
> >    [javac] location: class javax.servlet.jsp.JspFactory
> >    [javac]     _el_expressionfactory =
>
> > _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext( 
> > )).getExpressionFactory();
> >    [javac]                                         ^
> >    [javac] 3 errors
>
> > On Dec 4, 6:30 am, Alex Humesky <[email protected]> wrote:
> > > GPE's AppEngine SDK bundle version 1.4.0 is now up. Sorry for the
> > > delay.
>
> > > On Dec 3, 11:02 am, Don Schwarz <[email protected]> wrote:
>
> > > > My apologies.  We plan to have it up before the end of the day today.
>
> > > > On Fri, Dec 3, 2010 at 9:26 AM, Royce Fullerton <[email protected]>
> > wrote:
> > > > > When will the Eclipse plugin update site be updated?
>
> > > > > The plugin is now version 1.4, but the SDK is still version 1.3.8.
>
> > > > > On Dec 3, 2:59 am, "Ikai Lan (Google)" 
> > > > > <[email protected]<ikai.l%[email protected]>
>
> > > > > wrote:
> > > > >> Dance dance robot is a bit older and the API may have changed
> > slightly (not
> > > > >> sure, I have not done a visual check), but it's a good example of
> > how to use
> > > > >> JSNI with the Channel API:
>
> > > > >>http://code.google.com/p/dance-dance-robot/
>
> > > > >> --
> > > > >> Ikai Lan
> > > > >> Developer Programs Engineer, Google App Engine
> > > > >> Blogger:http://googleappengine.blogspot.com
> > > > >> Reddit:http://www.reddit.com/r/appengine
> > > > >> Twitter:http://twitter.com/app_engine
>
> > > > >> On Thu, Dec 2, 2010 at 3:50 PM, emerix <[email protected]> wrote:
> > > > >> > Great release! Are there some libraries/docs for GWT and the
> > Channel
> > > > >> > API ?
>
> > > > >> > On Dec 2, 10:17 pm, "Ikai Lan (Google)" 
> > > > >> > <[email protected]<ikai.l%[email protected]>
> > <ikai.l%[email protected] <ikai.l%[email protected]>>
>
> > > > >> > wrote:
> > > > >> > > They're still rolling out:
>
> > > > >> > >http://code.google.com/appengine/docs/java/channel/
>
> > > > >> > > If you see an error, wait a bit and refresh.
>
> > > > >> > > --
> > > > >> > > Ikai Lan
> > > > >> > > Developer Programs Engineer, Google App Engine
> > > > >> > > Blogger:http://googleappengine.blogspot.com
> > > > >> > > Reddit:http://www.reddit.com/r/appengine
> > > > >> > > Twitter:http://twitter.com/app_engine
>
> > > > >> > > On Thu, Dec 2, 2010 at 1:10 PM, Ikai Lan (Google)
> > > > >> > > <[email protected] <ikai.l%[email protected]> <
> > ikai.l%[email protected] <ikai.l%[email protected]>><
> > > > >> > ikai.l%[email protected] <ikai.l%[email protected]> <
> > ikai.l%[email protected] <ikai.l%[email protected]>>>
>
> > > > >> > > > wrote:
> > > > >> > > > The docs aren't live yet. They'll be live later in the day.
>
> > > > >> > > > --
> > > > >> > > > Ikai Lan
> > > > >> > > > Developer Programs Engineer, Google App Engine
> > > > >> > > > Blogger:http://googleappengine.blogspot.com
> > > > >> > > > Reddit:http://www.reddit.com/r/appengine
> > > > >> > > > Twitter:http://twitter.com/app_engine
>
> > > > >> > > > On Thu, Dec 2, 2010 at 1:05 PM, Guillaume Laforge <
> > [email protected]
> > > > >> > >wrote:
>
> > > > >> > > >> I don't see any Java API in the javadocs about the Channel
> > API. Is it
> > > > >> > > >> normal??
>
> > > > >> > > >> On Thu, Dec 2, 2010 at 21:50, Guillaume Laforge <
> > [email protected]
> > > > >> > >wrote:
>
> > > > >> > > >>> Actually, one can download the SDK here at least:
> > > > >> > > >>>http://code.google.com/p/googleappengine/downloads/list
>
> > > > >> > > >>> On Thu, Dec 2, 2010 at 21:50, Guillaume Laforge <
> > [email protected]
> > > > >> > >wrote:
>
> > > > >> > > >>>> It's not yet on the download area either, nor the
> > documentation been
> > > > >> > > >>>> updated.
> > > > >> > > >>>> I guess the blog post was a bit in advance, and we'll see
> > the
> > > > >> > artifacts
> > > > >> > > >>>> shortly.
> > > > >> > > >>>> We're all too excited and impatient :-)
>
> > > > >> > > >>>> --
> > > > >> > > >>>> Guillaume
> > > > >> > > >>>>http://gaelyk.appspot.com
>
> > > > >> > > >>>> On Thu, Dec 2, 2010 at 21:45, Matt Farnell <
> > [email protected]>
> > > > >> > wrote:
>
> > > > >> > > >>>>> It seems 1.4 isn't yet available as on the eclipse plugin
> > url
> > > > >> > > >>>>>http://dl.google.com/eclipse/plugin/3.6
>
> > > > >> > > >>>>> Is this an error or do we have to wait for a few extra
> > days like
> > > > >> > last
> > > > >> > > >>>>> time?
>
> > > > >> > > >>>>> --
> > > > >> > > >>>>> 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
> > > > >> > > >>>>> [email protected].
> > > > >> > > >>>>> To unsubscribe from this group, send email to
> > > > >> > > >>>>> [email protected]<google-appengine-java%2B
> > > > >> > > >>>>>  [email protected]><google-appengine-java%2B
> > [email protected]><google-appengine-java%2B
> > > > >> > [email protected]>
> > > > >> > > >>>>> .
> > > > >> > > >>>>> For more options, visit this group at
> > > > >> > > >>>>>http://groups.google.com/group/google-appengine-java?hl=en
> > .
>
> > > > >> > > >>>> --
> > > > >> > > >>>> Guillaume Laforge
> > > > >> > > >>>> Groovy Project Manager
> > > > >> > > >>>> Head of Groovy Development at SpringSource
> > > > >> > > >>>>http://www.springsource.com/g2one
>
> > > > >> > > >>> --
> > > > >> > > >>> Guillaume Laforge
> > > > >> > > >>> Groovy Project Manager
> > > > >> > > >>> Head of Groovy Development at SpringSource
> > > > >> > > >>>http://www.springsource.com/g2one
>
> > > > >> > > >> --
> > > > >> > > >> Guillaume Laforge
> > > > >> > > >> Groovy Project Manager
> > > > >> > > >> Head of Groovy Development at SpringSource
> > > > >> > > >>http://www.springsource.com/g2one
>
> > > > >> > > >> --
> > > > >> > > >> 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
> > > > >> > > >> [email protected].
> > > > >> > > >> To unsubscribe from this group, send email to
> > > > >> > > >> [email protected]<google-appengine-java%2B
> > > > >> > > >>  [email protected]><google-appengine-java%2B
> > [email protected]><google-appengine-java%2B
> > > > >> > [email protected]>
> > > > >> > > >> .
> > > > >> > > >> For more options, visit this group at
> > > > >> > > >>http://groups.google.com/group/google-appengine-java?hl=en.
>
> > > > >> > --
> > > > >> > 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
> > > > >> > [email protected].
> > > > >> > To unsubscribe from this group, send email to
> > > > >> > [email protected]<google-appengine-java%2B
> > > > >> >  [email protected]><google-appengine-java%2B
> > [email protected]>
> > > > >> > .
> > > > >> > For more options, visit this group at
> > > > >> >http://groups.google.com/group/google-appengine-java?hl=en.
>
> > > > > --
> > > > > 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
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>
> ...
>
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