buildloop error

Hello, 
 
I'm new to cruisecontrol and already very impressed by it's efficacity. 
But I 
have some problem on it that you can maybe help me to resolve. 

1.
The first problem is that I have an error message showing in the console 
each 5 seconds (the message is shown later). 

My server environment is:
FreeBSD 6.3
Java 1.6.0.07.02 (Diablo Java)
CruiseControl 2.8.3


The error message:
===============================================================
2010-05-18 10:52:00.060::WARN:  /dashboard/buildloop/listener
com.thoughtworks.xstream.converters.ConversionException: Cannot construct 
net.sourceforge.cruisecontrol.BuildLoopInformation as it does not have a 
no-args constructor
---- Debugging information ----
message             : Cannot construct 
net.sourceforge.cruisecontrol.BuildLoopInformation as it does not have a 
no-args constructor
cause-exception     : 
com.thoughtworks.xstream.converters.reflection.ObjectAccessException
cause-message       : Cannot construct 
net.sourceforge.cruisecontrol.BuildLoopInformation as it does not have a 
no-args constructor
class               : net.sourceforge.cruisecontrol.BuildLoopInformation
required-type       : net.sourceforge.cruisecontrol.BuildLoopInformation
path                : /buildloop
line number         : 1
-------------------------------
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:63)
        at 
com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45)
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117)
        at 
com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:29)
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:846)
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:833)
        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:781)
        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:773)
        at 
net.sourceforge.cruisecontrol.util.BuildInformationHelper.toObject(BuildInformationHelper.java:32)
        at 
net.sourceforge.cruisecontrol.dashboard.web.BuildLoopController.handleRequestInternal(BuildLoopController.java:28)
        at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
        at 
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
        at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:858)
        at 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:792)
        at 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)
        at 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:441)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
        at 
org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
        at 
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
        at 
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:324)
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
        at 
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
        at 
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
        at 
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
        at 
org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: 
com.thoughtworks.xstream.converters.reflection.ObjectAccessException: 
Cannot construct net.sourceforge.cruisecontrol.BuildLoopInformation as it 
does not have a no-args constructor
        at 
com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.newInstance(PureJavaReflectionProvider.java:59)
        at 
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.instantiateNewInstance(AbstractReflectionConverter.java:257)
        at 
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:124)
        at 
com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
        ... 35 more

2.
Another problem is that how could I configure to make CruiseControl to 
trigger build each commit for svn.
I tried to use <modificationset> and <schedule> element and failed.

Here is my config.xml:
========================================================== 
<project name="MFO_JAPAN">
        <listeners>
            <currentbuildstatuslistener 
file="logs/${project.name}/status.txt"/>
        </listeners>

        <bootstrappers>
              <svnbootstrapper 
localWorkingCopy="/usr/home/build/ccproject/mfo/japan"/>
        </bootstrappers>

        <modificationset quietperiod="30">
            <svn localWorkingCopy="/usr/home/build/ccproject/mfo/japan" />
        </modificationset>

        <schedule interval="43200">
                <ant anthome="apache-ant-1.8.1" 
buildfile="/usr/home/build/ccproject/mfo/japan/build.xml"/>
        </schedule>

        <log>
            <merge dir="projects/${project.name}/target/test-results"/>
        </log>

        <publishers>
        </publishers>
</project>

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