Hi all,
First off, I am a new user and have built a very simple application.
It works fine under hosted mode. It compiles with no errors. When I
deploy it to the web server and point a browser at it, it throws a
ClassNotFoundException. I suspect this is a really simple problem
(probably caused by a really stupid error). This is driving me crazy
and I would really appreciate ANY help or suggestions anyone could
throw my way.
I have included a lot of error logs, copies of web.xml, directory
structures etc. below.
Trying to work through this is a learning experience, but I am
stumped. The fact that the server is able to sort out the URL sent
from the client enough to know the name of the object is
ca.KeithFuller.server.CorpusServiceImpl suggests to me that the server
is finding the web.xml file, which suggests that it should be able to
find the object since I believe that WEB-INF/classes is always on the
search path. The file CorpusServiceImpl.class is in WEB-INF/classes,
and the corresponding java file starts with:
package ca.KeithFuller.server;
import java.util.*; // for Scanner
import java.io.*; // for println
import ca.KeithFuller.client.CorpusSearchReturns;
import ca.KeithFuller.client.CorpusSearchService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
public class CorpusServiceImpl extends RemoteServiceServlet
implements CorpusSearchService
{
...
A whole pile of details follow:
I use GWT 1.4.61
I use Eclipse 3.2.2
My webserver uses Linux, Tomcat and Apache.
I use FireFox 3.0.1 and the URL is
http://www.keithfuller.ca:9108/CorpusSearch/CorpusSearch.html
The client code contains:
...
// Create the proxy object
final CorpusSearchServiceAsync serviceProxy =
(CorpusSearchServiceAsync)
GWT.create(CorpusSearchService.class);
// Cast the proxy object to ServiceDefTarget
String serviceUrl = GWT.getModuleBaseURL() + "corpus-search";
// if (GWT.isScript()){
// serviceUrl = "/corpus-search";
// }
((ServiceDefTarget)serviceProxy).setServiceEntryPoint(serviceUrl);
...
The localhost.2008-09-18.log file contains:
Sep 18, 2008 10:21:04 AM org.apache.catalina.core.ApplicationContext
log
INFO: Marking servlet corpus-search as unavailable
Sep 18, 2008 10:21:04 AM org.apache.catalina.core.ApplicationContext
log
SEVERE: Error loading WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
[EMAIL PROTECTED]
ca.KeithFuller.server.CorpusServiceImpl
java.lang.ClassNotFoundException:
ca.KeithFuller.server.CorpusServiceImpl
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:
1362)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:
1208)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:
1068)
at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:
791)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
127)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:
174)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:
127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:
117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:
874)
at org.apache.coyote.http11.Http11BaseProtocol
$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:
665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:
528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:
81)
at org.apache.tomcat.util.threads.ThreadPool
$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)
Sep 18, 2008 10:21:04 AM org.apache.catalina.core.StandardWrapperValve
invoke
SEVERE: Allocate exception for servlet corpus-search
java.lang.ClassNotFoundException:
ca.KeithFuller.server.CorpusServiceImpl
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:
1362)
at
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:
1208)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:
1068)
at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:
791)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
127)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:
174)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:
127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:
117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:
874)
at org.apache.coyote.http11.Http11BaseProtocol
$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:
665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:
528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:
81)
at org.apache.tomcat.util.threads.ThreadPool
$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:595)
The web server has the directory structure:
apache-tomcat-5.5.25/webapps
CorpusSearch
... a pile of html, rpc, js, html, css, and...
web.xml
WEB-INF
classes
CorpusSearch.class
CorpusSearchReturns.class
CorpusSearchServiceAsync.class
CorpusSearchData.class
CorpusSearchService.class
CorpusServiceImpl.class
web.xml
lib
gwt-servlet.jar
web.xml
The dev machine directory structure is:
Eclipse Workspace
.metadata
SearchProject
...
src
ca
KeithFuller
CorpusSearch.gwt.xml
client
CorpusSearch.java
CorpusSearchReturns.java
CorpusSearchServiceAsync.java
CorpusSearchData.java
CorpusSearchService.java
server
CorpusServiceImpl.java
public
CorpusSearch.html
SearchProject.css
The Eclipse Package Explorer shows:
SearchProject
src
ca.KeithFuller
client (a package)
CorpusSearch.java
CorpusSearchReturns.java
CorpusSearchServiceAsync.java
CorpusSearchData.java
CorpusSearchService.java
server (a package)
CorpusServiceImpl.java
public (a folder)
CorpusSearch.html
CorpusSearch.gwt.xml
CorpusSearch.gwt.xml contains:
<module>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User'/>
<!-- Specify the app entry point class. -->
<entry-point class='ca.KeithFuller.client.CorpusSearch'/>
<servlet path="/corpus-search"
class="ca.KeithFuller.server.CorpusServiceImpl"/>
<stylesheet src="SearchProject.css"/>
</module>
web.xml (all of them!) contain:
<?xml version="1.0" encoding="UTF-8"?>
<web-app>
<servlet>
<servlet-name>corpus-search</servlet-name>
<servlet-class>ca.KeithFuller.server.CorpusServiceImpl</servlet-
class>
</servlet>
<servlet-mapping>
<servlet-name>corpus-search</servlet-name>
<!-- <url-pattern>/CorpusSearch</url-pattern>
-->
<url-pattern>/corpus-search</url-pattern>
</servlet-mapping>
</web-app>
If you got this far and have any ideas, then please let me know.
Thanks
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