Getting ClassNotFound Exception for StringEscapeUtils in GWT-Dev.jar 2.2.0

[Austin Dworaczyk Wiltshire]

Pretty much as the title says. I'm using GWT 2.2.0, and everything
compiles without errors in Eclipse.

However, as soon as I use my applications such that it makes a call to
StringEscapeUtils.escapeHTML(), I get a stack trace and a
ClassNotFound exception.

Here is my stack trace:

2011-03-03 18:52:48.615 java[1074:a07] Can't open input server /Users/
adub/Library/InputManagers/Edit in TextMate
2011-03-03 18:52:48.640 java[1074:a07] [Java CocoaComponent
compatibility mode]: Enabled
2011-03-03 18:52:48.640 java[1074:a07] [Java CocoaComponent
compatibility mode]: Setting timeout for SWT to 0.100000
Initializing AppEngine server
Logging to JettyLogger(null) via
com.google.apphosting.utils.jetty.JettyLogger
Successfully processed /Users/adub/Documents/eclipse_workspace/
307W11-3/war/WEB-INF/appengine-web.xml
Successfully processed /Users/adub/Documents/eclipse_workspace/
307W11-3/war/WEB-INF/web.xml
The server is running at http://localhost:8888/
[ERROR] javax.servlet.ServletContext log: Exception while dispatching
incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method
'public abstract java.lang.String
edu.calpoly.cpe307.team3.weblat.client.LabToXMLGeneratorService.convertToXML(org.web_ide.shared.lab.Lab)
throws edu.calpoly.cpe307.team3.weblat.shared.LTXGException' threw an
unexpected exception: java.lang.NoClassDefFoundError: org/apache/
commons/lang/StringEscapeUtils
at
com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:
385)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
588)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
208)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
58)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1157)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
122)
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
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:351)
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.content(HttpConnection.java:938)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
409)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:582)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/
StringEscapeUtils
at
edu.calpoly.cpe307.team3.weblat.server.LabToXMLGenerator.cleanseHTML(LabToXMLGenerator.java:
307)
at
edu.calpoly.cpe307.team3.weblat.server.LabToXMLGenerator.buildLabElement(LabToXMLGenerator.java:
261)
at
edu.calpoly.cpe307.team3.weblat.server.LabToXMLGenerator.buildStep(LabToXMLGenerator.java:
222)
at
edu.calpoly.cpe307.team3.weblat.server.LabToXMLGenerator.parseLab(LabToXMLGenerator.java:
184)
at
edu.calpoly.cpe307.team3.weblat.server.LabToXMLGenerator.convertToXML(LabToXMLGenerator.java:
46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:
100)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
569)
... 30 more
Caused by: java.lang.ClassNotFoundException:
org.apache.commons.lang.StringEscapeUtils
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at
com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:
176)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 41 more


However, I can drill down into the gwt-dev.jar file in Eclipse, and I
can see the class file for StringEscapeUtils.

GWT-Dev is added to my build path in Eclipse, so I'm stumped.

Any help would be appreciated.

[ecstasy2]

Hi.
Did you find any solution to this problem?

Thanks.

On 4 mar, 03:09, Austin Dworaczyk Wiltshire <adw.wiltsh...@gmail.com>
wrote:

> Pretty much as the title says. I'm using GWT 2.2.0, and everything
> compiles without errors in Eclipse.
>
> However, as soon as I use my applications such that it makes a call to
> StringEscapeUtils.escapeHTML(), I get a stack trace and a
> ClassNotFound exception.
>
> Here is my stack trace:
>
> 2011-03-03 18:52:48.615 java[1074:a07] Can't open input server /Users/
> adub/Library/InputManagers/Edit in TextMate
> 2011-03-03 18:52:48.640 java[1074:a07] [Java CocoaComponent
> compatibility mode]: Enabled
> 2011-03-03 18:52:48.640 java[1074:a07] [Java CocoaComponent
> compatibility mode]: Setting timeout for SWT to 0.100000
> Initializing AppEngine server
> Logging to JettyLogger(null) via
> com.google.apphosting.utils.jetty.JettyLogger
> Successfully processed /Users/adub/Documents/eclipse_workspace/
> 307W11-3/war/WEB-INF/appengine-web.xml
> Successfully processed /Users/adub/Documents/eclipse_workspace/
> 307W11-3/war/WEB-INF/web.xml

> The server is running athttp://localhost:8888/