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java.lang.IllegalStateException: Repository [default]
cannot be renamed as [testLog].	at org.apache.log4j.Hierarchy.setName(Hierarchy.java:262)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:205)	at org.apache.log4j.config.PropertySetter.setProperty(PropertySetter.java:156)	at org.apache.log4j.joran.action.ParamAction.begin(ParamAction.java:63)	at org.apache.log4j.joran.spi.Interpreter.callBeginAction(Interpreter.java:239)	at org.apache.log4j.joran.spi.Interpreter.startElement(Interpreter.java:131)	at org.apache.log4j.joran.spi.JoranDocument$StartElementEvent.replay(JoranDocument.java:225)	at org.apache.log4j.joran.spi.JoranDocument.replay(JoranDocument.java:113)	at org.apache.log4j.joran.JoranConfigurator.doConfigure(JoranConfigurator.java:170)	at org.apache.log4j.joran.JoranConfigurator.doConfigure(JoranConfigurator.java:89)	at org.apache.log4j.chainsaw.LogUI.loadConfigurationUsingPluginClassLoader(LogUI.java:1892)	at org.apache.log4j.chainsaw.LogUI.createChainsawGUI(LogUI.java:325)	at org.apache.log4j.chainsaw.LogUI.main(LogUI.java:256)