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Saturday, 15. August 2009
Jetty and the NoSuchMethodError
javatux, 00:30h
Jetty is a small servlet engine you can embed in your application. For my first experiment I started with a simple program to use it as HTML server:
I have created a simple HTML page which is located in the directory src/main/webapp. After running this little Runner class from Eclipse I could see the HTML page under http://localhost:4040/.
Now I want more - I want to use it as JSP engine. Before I did a small test to use it as servlet engine which was successful (I created only a small web.xml with an InitServlet). To use Jetty as JSP environment you must include some libraries which are listed in Embedding+Jetty (e.g. the Jasper libraries).
I put the needed libraries in my classpath, created a simple JSP and started Jetty again. When I access the JSP page I got a HTTP ERROR 500 and the following stacktrace:
to be continued...
public final class Runner { private final Server jetty; public Runner() { jetty = new Server(4040); } public void start() throws Exception { jetty.setHandler(new WebAppContext("src/main/webapp", "/")); jetty.start(); } public static void main(String[] args) throws Exception { ClasspathMonitor.addAsShutdownHook(); Runner runner = new Runner(); runner.start(); } }
I have created a simple HTML page which is located in the directory src/main/webapp. After running this little Runner class from Eclipse I could see the HTML page under http://localhost:4040/.
Now I want more - I want to use it as JSP engine. Before I did a small test to use it as servlet engine which was successful (I created only a small web.xml with an InitServlet). To use Jetty as JSP environment you must include some libraries which are listed in Embedding+Jetty (e.g. the Jasper libraries).
I put the needed libraries in my classpath, created a simple JSP and started Jetty again. When I access the JSP page I got a HTTP ERROR 500 and the following stacktrace:
org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer.(Lorg/eclipse/jdt/internal/compiler/env/IBinaryType;)V Caused by: java.lang.NoSuchMethodError: org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer.(Lorg/eclipse/jdt/internal/compiler/env/IBinaryType;)V at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:214) at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:183) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:119) at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:178) at org.eclipse.jdt.internal.compiler.lookup.Scope.getPackage(Scope.java:2149) ...What the hell is the problem here? My first suspicion was that it could be a classpath problem. But how can I confirm it?
to be continued...
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