我得到这个错误

Mar 22, 2011 12:36:01 AM org.apache.catalina.loader.WebappClassLoader findResourceInternal
INFO: Illegal access: this web application instance has been stopped already.  Could not load META-INF/services/javax.xml.parsers.DocumentBuilderFactory.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
Mar 22, 2011 12:36:01 AM org.apache.catalina.loader.WebappClassLoader loadClass
INFO: Illegal access: this web application instance has been stopped already.  Could not load com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1562)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
    at javax.xml.parsers.FactoryFinder.getProviderClass(Unknown Source)
    at javax.xml.parsers.FactoryFinder.newInstance(Unknown Source)
    at javax.xml.parsers.FactoryFinder.find(Unknown Source)
    at javax.xml.parsers.DocumentBuilderFactory.newInstance(Unknown Source)
    at com.xmlparser.XmlParser.parseXmlFile(XmlParser.java:33)
    at com.xmlparser.XmlParser.<init>(XmlParser.java:25)
    at com.jobs.SendRoutineMessagesJob.execute(SendRoutineMessagesJob.java:29)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)

有没有人能告诉我，我在这里犯了什么错误。我不知道我是否需要粘贴源代码。