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java.lang.ClassCastException: org.dom4j.DocumentFactory cannot be cast to org.dom4j.DocumentFactory	at org.dom4j.DocumentFactory.getInstance(DocumentFactory.java:97)	at org.dom4j.io.SAXReader.getDocumentFactory(SAXReader.java:645)	at org.dom4j.io.SAXReader.createContentHandler(SAXReader.java:969)	at org.dom4j.io.SAXReader.read(SAXReader.java:449)	at org.dom4j.io.SAXReader.read(SAXReader.java:484)	at org.dom4j.io.SAXReader.read(SAXReader.java:365)	at edu.umd.cs.findbugs.PluginLoader.getPluginDescriptor(PluginLoader.java:1120)	at edu.umd.cs.findbugs.PluginLoader.getPluginDescriptor(PluginLoader.java:1122)	at edu.umd.cs.findbugs.PluginLoader.init(PluginLoader.java:611)	at edu.umd.cs.findbugs.PluginLoader.(PluginLoader.java:357)	at edu.umd.cs.findbugs.PluginLoader.loadCorePlugin(PluginLoader.java:1419)