JetSpeed2因dom4j包冲突导致PSML页面文件数据丢失

使用JetSpeed2进行二次开发时突然出现在保存Portlet配置信息时出现PSML页面文件数据丢失的情况，几经测试，最终发现是因为Portlet中的dom4j.jar与jetspeed应用中的dom4j包冲突导致的，删除Portlet应用中的dom4j.jar包后重启即可。

关键错误：

org.apache.jetspeed.page.PageNotFoundException: Could not unmarshal the file /home/deploy/zhbg/PortalServer/webapps/portal/../../pages/NPC/default-page.psml

Caused by: org.xml.sax.SAXParseException; Premature end of file.

详细错误：

[Fatal Error] :-1:-1: Premature end of file.
org.apache.jetspeed.page.PageNotFoundException: Could not unmarshal the file /home/deploy/zhbg/PortalServer/webapps/portal/../../pages/NPC/default-page.psml
    at org.apache.jetspeed.page.document.psml.CastorFileSystemDocumentHandler.unmarshallDocument(CastorFileSystemDocumentHandler.java:576)
    at org.apache.jetspeed.page.document.psml.CastorFileSystemDocumentHandler.getDocument(CastorFileSystemDocumentHandler.java:690)
    at org.apache.jetspeed.page.document.psml.CastorFileSystemDocumentHandler.refresh(CastorFileSystemDocumentHandler.java:744)
    at org.apache.jetspeed.cache.file.FileCache$1.notifyElementChanged(FileCache.java:209)
    at org.apache.jetspeed.cache.impl.EhCacheImpl$1.notifyElementUpdated(EhCacheImpl.java:146)
    at net.sf.ehcache.event.RegisteredEventListeners.notifyListener(RegisteredEventListeners.java:306)
    at net.sf.ehcache.event.RegisteredEventListeners.invokeListener(RegisteredEventListeners.java:284)
    at net.sf.ehcache.event.RegisteredEventListeners.internalNotifyElementUpdated(RegisteredEventListeners.java:180)
    at net.sf.ehcache.event.RegisteredEventListeners.notifyElementUpdated(RegisteredEventListeners.java:158)
    at net.sf.ehcache.Cache.notifyPutInternalListeners(Cache.java:1479)
    at net.sf.ehcache.Cache.putInternal(Cache.java:1456)
    at net.sf.ehcache.Cache.put(Cache.java:1383)
    at net.sf.ehcache.Cache.put(Cache.java:1348)
    at org.apache.jetspeed.cache.impl.EhCacheImpl.put(EhCacheImpl.java:74)
    at org.apache.jetspeed.cache.file.FileCache$FileCacheScanner.run(FileCache.java:348)
Caused by: Premature end of file.
    at org.exolab.castor.xml.Unmarshaller.convertSAXExceptionToMarshalException(Unmarshaller.java:775)
    at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:672)
    at org.apache.jetspeed.page.document.psml.CastorFileSystemDocumentHandler.unmarshallDocument(CastorFileSystemDocumentHandler.java:429)
    ... 14 more
Caused by: org.xml.sax.SAXParseException; Premature end of file.
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.jetspeed.page.document.psml.CastorFileSystemDocumentHandler$2.start(CastorFileSystemDocumentHandler.java:547)
    at org.exolab.castor.xml.Unmarshaller.unmarshal(Unmarshaller.java:669)
    ... 15 more