On 28/04/2020 07:02, Markus Fömpe wrote:
> Hi,
>
> With Tomcat 9.0.34 the JDT compiler was updated to 4.15.
> Since then, there is an error when Tomcat compiles the JSP at runtime when
> this construct is used in a JSP:
Not good news but thanks for bring this up.
We skipped 4.14 because there was a compilation error with the Tomcat
source code. I hope this isn't another issue with JDT.
I'll start looking into this.
> <%@ page import="java.util.List"%>
> <%@ page import="java.util.ArrayList"%>
> <%
> class InnerClass {
> // some class members
> }
>
> List<InnerClass> list = new ArrayList<>();
>
> for(InnerClass elements : list) {
> // do sth
> }
> %>
>
>
> This is root cause:
>
> java.lang.ClassCastException: class
> org.eclipse.jdt.internal.compiler.lookup.PlainPackageBinding cannot be cast
> to class org.eclipse.jdt.internal.compiler.lookup.TypeBinding
> (org.eclipse.jdt.internal.compiler.lookup.PlainPackageBinding and
> org.eclipse.jdt.internal.compiler.lookup.TypeBinding are in unnamed module of
> loader java.net.URLClassLoader @20398b7c)
Which Java version are you using here?
<snip/>
> If the JSP is precompiled using an ant task and the JDT compiler, the error
> doesn’t occur:
<snip/>
> I know that the error is within the JDT Stacktrace, but because this error
> doesn’t occur when using the JDT for compiling the generated Java file, I
> assume that this problem is related to a Tomcat configuration.
That seems like a reasonable conclusion.
> I use the docker image tomcat:9.0.34.
Just to note that the ASF doesn't provide Docker images. It seems
unlikely but if we can't reproduce this with a clean install of Apache
Tomcat as provided by the ASF, you might need to take this up with the
provider of that image.
> If required I can also provide the Java source generated from the JSP.
Thanks. I don't need it yet. I'll ping this thread if that changes.
Mark
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