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java.lang.IllegalStateException: Repository [default]
 cannot be renamed as [testLog].	at org.apache.log4j.Hierarchy.setName(	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(	at sun.reflect.DelegatingMethodAccessorImpl.invoke(	at java.lang.reflect.Method.invoke(	at org.apache.log4j.config.PropertySetter.setProperty(	at org.apache.log4j.config.PropertySetter.setProperty(	at org.apache.log4j.joran.action.ParamAction.begin(	at org.apache.log4j.joran.spi.Interpreter.callBeginAction(	at org.apache.log4j.joran.spi.Interpreter.startElement(	at org.apache.log4j.joran.spi.JoranDocument$StartElementEvent.replay(	at org.apache.log4j.joran.spi.JoranDocument.replay(	at org.apache.log4j.joran.JoranConfigurator.doConfigure(	at org.apache.log4j.joran.JoranConfigurator.doConfigure(	at org.apache.log4j.chainsaw.LogUI.loadConfigurationUsingPluginClassLoader(	at org.apache.log4j.chainsaw.LogUI.access$17(	at org.apache.log4j.chainsaw.LogUI$39$	at