我的持续集成服务器运行环境是CruiseControl 2.8.3 + svn 1.6.9 + ant 1.7
config.xml如下所示
<cruisecontrol>
<project name="TestCruiseControl">
<listeners>
<currentbuildstatuslistener file="logs/${project.name}/status.txt"/>
</listeners>
<bootstrappers>
<svnbootstrapper localWorkingCopy="projects/${project.name}" />
</bootstrappers>
<modificationset quietperiod="0">
<svn LocalWorkingCopy="projects/${project.name}" />
</modificationset>
<schedule interval="30">
<ant anthome="apache-ant-1.7.0" buildfile="projects/${project.name}/build.xml" target="all" />
</schedule>
<log>
<merge dir="projects/${project.name}/target/test-results"/>
</log>
<publishers>
</publishers>
</project>
</cruisecontrol>
当执行cruisecontrol.bat时，输出如下内容：
[cc]April-02 15:08:14 Project - Project TestCruiseControl: in build queue
[cc]April-02 15:08:14 jectController- TestCruiseControl Controller: build progress event: in build queue
[cc]April-02 15:08:14 BuildQueue - now adding to the thread queue: TestCruiseControl
[cc]April-02 15:08:14 Project - Project TestCruiseControl: bootstrapping
[cc]April-02 15:08:14 jectController- TestCruiseControl Controller: build progress event: bootstrapping
[cc]April-02 15:08:15 VNBootstrapper- U src\Main.java
[cc]April-02 15:08:15 VNBootstrapper- Updated to revision 77.
[cc]April-02 15:08:15 Project - Project TestCruiseControl: checking for modifications
[cc]April-02 15:08:15 jectController- TestCruiseControl Controller: build progress event: checking for modifications
[cc]April-02 15:08:18 Project - Project TestCruiseControl: No modifications found, build not necessary.
[cc]April-02 15:08:18 Project - Project TestCruiseControl: idle
[cc]April-02 15:08:18 jectController- TestCruiseControl Controller: build progress event: idle
[cc]April-02 15:08:18 Project - Project TestCruiseControl: next build in 30 seconds
[cc]April-02 15:08:18 Project - Project TestCruiseControl: waiting for next time to build
[cc]April-02 15:08:18 jectController- TestCruiseControl Controller: build progress event: waiting for next time to build
如上所示，SVN服务器上已经有内容更新，而且持续集成服务器上的<svnbootstrapper>已经把更新的内容取下来了，但是<modificationset> 和 <schedule> 却报出 "no modifications found and build not necessary"，这是为什么呢？
请高手指点
