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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:393) at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:141) at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:153) at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:415) at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:384) at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:790) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:673) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:616) at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:602) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:460) at org.apache.log4j.LogManager.<clinit>(LogManager.java:113) at org.apache.log4j.Logger.getLogger(Logger.java:94) at se.anatom.ejbca.ca.store.certificateprofiles.CertificateProfile.<clinit>(CertificateProfile.java:34)