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**Isomorphic** · 27 Apr 2010, 10:01

Make sure your includes are correct in your moduleName.get.XML file. The correct includes are discussed in the FAQ.

**cliff.newton** · 7 Oct 2010, 06:49

Using SmartGWT Pro 2.3
GWT 2.0.4
Google Chrome 6.0.472.63
Mozilla Firefox 3.6.10

Server specs:
Ubuntu 8.04.4 LTS
JBoss Web 2.1.1.CR3

I'm getting the same error while trying to deploy an app to our test server. The app throws a ServletException from DataSourceLoader as soon as it is loaded (Chrome says DataSourceLoader line 1). I used chrome dev tools and looked in the resources tab and the DataSourceLoader has the following output.

Code:

<BR>BaseServlet Global Exception<BR>

<PRE>

javax.servlet.ServletException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.Map
    at com.isomorphic.datasource.BasicDataSource.buildFieldData(BasicDataSource.java:315)
    at com.isomorphic.datasource.BasicDataSource.init(BasicDataSource.java:167)
    at com.isomorphic.sql.SQLDataSource.init(SQLDataSource.java:145)
    at com.isomorphic.datasource.BasicDataSource.fromConfig(BasicDataSource.java:134)
    at com.isomorphic.datasource.DataSource.fromConfig(DataSource.java:164)
    at com.isomorphic.datasource.FileSystemDSRepo.loadDS(FileSystemDSRepo.java:110)
    at com.isomorphic.datasource.DataSource.forName(DataSource.java:147)
    at com.isomorphic.datasource.DataSource.forName(DataSource.java:144)
    at com.isomorphic.datasource.DataSource.forName(DataSource.java:141)
    at com.isomorphic.datasource.PoolableDataSourceFactory.makeUnpooledObject(PoolableDataSourceFactory.java:89)
    at com.isomorphic.datasource.PoolableDataSourceFactory.makeObject(PoolableDataSourceFactory.java:96)
    at com.isomorphic.pool.PoolManager.borrowObject(PoolManager.java:76)
    at com.isomorphic.datasource.DataSourceManager.getDataSource(DataSourceManager.java:56)
    at com.isomorphic.servlet.DataSourceLoader.processRequest(DataSourceLoader.java:80)
    at com.isomorphic.servlet.DataSourceLoader.doGet(DataSourceLoader.java:64)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:183)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:451)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:325)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Thread.java:619)


    at com.isomorphic.servlet.DataSourceLoader.processRequest(DataSourceLoader.java:88)

    at com.isomorphic.servlet.DataSourceLoader.doGet(DataSourceLoader.java:64)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)

    at com.isomorphic.servlet.BaseServlet.service(BaseServlet.java:152)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:183)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

    at org.jboss.web.rewrite.RewriteValve.invoke(RewriteValve.java:451)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:325)

    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)

    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)

    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

    at java.lang.Thread.run(Thread.java:619)

</PRE>

Firefox gives me the same error. I have gone through the FAQ and followed all instructions here http://forums.smartclient.com/showth...t=8159#aDSLoad and I still get the error. I don't have any sample code to post since I'm not actually trying to load a datasource. This error occurs as soon as the page is loaded... before I try to access any data.

My inherits

Code:

  <inherits name="com.smartgwt.tools.SmartGwtTools"/>
  <inherits name="com.smartgwtpro.SmartGwtPro"/>
  <inherits name="com.smartgwtpro.tools.Tools"/>

**Isomorphic** · 7 Oct 2010, 06:54

See previous response - your <inherits> tags are wrong in your .gwt.xml file. You need to be importing com.smartgwtpro.* modules not com.smartgwt.* modules. Correct imports are in the FAQ (and QuickStart Guide, and installation instructions).

**cliff.newton** · 7 Oct 2010, 06:56

My inherits are just as the FAQ describes.

**cliff.newton** · 7 Oct 2010, 07:04

if it helps, here is my full gwt.xml file

Code:

<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='certwebportal'>
  <!-- Inherit the core Web Toolkit stuff.                        -->
  <inherits name='com.google.gwt.user.User'/>

  <!-- Inherit the default GWT style sheet.  You can change       -->
  <!-- the theme of your GWT application by uncommenting          -->
  <!-- any one of the following lines.                            -->
  <inherits name='com.google.gwt.user.theme.standard.Standard'/>
  <!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/> -->
  <!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/>     -->

  <!-- Other module inherits                                      -->
  <inherits name="com.smartgwt.tools.SmartGwtTools"/>
  <inherits name="com.smartgwtpro.SmartGwtPro"/>
  <inherits name="com.smartgwtpro.tools.Tools"/>

  <!-- Specify the app entry point class.                         -->
  <entry-point class='com.co.cert.client.certwebportal'/>

  <!-- Specify the paths for translatable code                    -->
  <source path='client'/>
  <source path='shared'/>

</module>

**Isomorphic** · 7 Oct 2010, 07:09

Then you have an Eclipse staleness issue - your import of smartgwtpro should be causing system/schema/*.ds.xml files to be deployed as part of your application, but they're missing.

You can typically fix Eclipse by doing an explicit GWT compile, or, if all else fails, switching to a different JDK and switching back (yes really. This is a reliably way of getting Eclipse to clean up corrupt internal state).

Unrelated, but get rid of the GWT Standard theme import.

**hopey_dishwasher** · 15 Aug 2011, 04:47

I realise this is an old thread, but I've just had this exact problem, and discovered that I had an incorrect value for gwtModuleName in server.properties.

So that might help someone else out in future.

Perhaps there could be an error message somewhere if the specified gwt module does not exist?

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ClassCastException: java.util.ArrayList cannot be cast to java.util.Map

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