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org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException at org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:558) at org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:355) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:409) at org.apache.commons.digester.Digester.<init>(Digester.java:304) at net.sf.jasperreports.engine.xml.JRXmlDigester.<init>(JRXmlDigester.java:62) at net.sf.jasperreports.engine.xml.JRXmlDigesterFactory.createDigester(JRXmlDigesterFactory.java:975) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:203) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:168) at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:152) at net.sf.jasperreports.engine.JasperCompileManager.compileReportToFile(JasperCompileManager.java:90) at pdf.Application.main(Application.java:15)Caused by: java.lang.NullPointerException at org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:543) ... 10 more