Problem with cglib enhancer, HashMap$Entry not found

[Lars Egar]

I am getting an exception "java.lang.NoClassDefFoundError: [Ljava/util/
HashMap$Entry;". I am using cglib to enhance a HashMap so I can
intercept method calls on the HashMap.

The line of code that throws the exception is:

Enhancer.create(HashMap.class, new SomeInterceptor());

I am using the latest plugin for eclipse (3.7). I am using cglib
version 2.2 (cglib-nodep-2.2.jar)

The stack trace is:

java.lang.NoClassDefFoundError: [Ljava/util/HashMap$Entry;
at
com.google.appengine.runtime.Request.process-02796318ce7d3a7b(Request.java)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2444)
at java.lang.Class.getDeclaredMethod(Class.java:229)
at net.sf.cglib.proxy.Enhancer.getCallbacksSetter(Enhancer.java:630)
at net.sf.cglib.proxy.Enhancer.setCallbacksHelper(Enhancer.java:618)
at net.sf.cglib.proxy.Enhancer.setThreadCallbacks(Enhancer.java:612)
at net.sf.cglib.proxy.Enhancer.createUsingReflection(Enhancer.java:
634)
at net.sf.cglib.proxy.Enhancer.firstInstance(Enhancer.java:538)
at
net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:
225)
at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:285)
at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:663)
at com.enhancetest.EnhanceTestServlet.doGet(EnhanceTestServlet.java:
30)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1166)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
388)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
182)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
418)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
542)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.tracing.TraceContext
$TraceContextRunnable.runInContext(TraceContext.java:449)
at com.google.tracing.TraceContext$TraceContextRunnable
$1.run(TraceContext.java:455)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:
695)
at com.google.tracing.TraceContext
$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:
333)
at com.google.tracing.TraceContext
$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:
325)
at com.google.tracing.TraceContext
$TraceContextRunnable.run(TraceContext.java:453)
at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.ClassNotFoundException: java.util.HashMap$Entry
... 35 more