With a default logback.xml containing this

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<contextName>Foo</contextName>
[..]
</configuration>

reloading the Logback configuration by means of

private static void initLogbackConfig(URL configUrl) {
ILoggerFactory loggerFactory = LoggerFactory.getILoggerFactory();
if(loggerFactory instanceof LoggerContext) {
LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
// reset previous configuration initially loaded from logback.xml
loggerContext.reset();
JoranConfigurator configurator = new JoranConfigurator();
configurator.setContext(loggerContext);
try

{ configurator.doConfigure(configUrl); StatusPrinter.print(loggerContext); }

catch(JoranException ex)

{ StatusPrinter.print(loggerContext); }

}
}

with a file containing

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<contextName>Foobar</contextName>
[..]
</configuration>

produces the following error:

12:21:28,919 |-ERROR in ch.qos.logback.classic.joran.action.ContextNameAction - Failed to rename context [Foo] as [Foobar] java.lang.IllegalStateException: Context has been already given a name
at java.lang.IllegalStateException: Context has been already given a name
at at ch.qos.logback.core.ContextBase.setName(ContextBase.java:128)
at at ch.qos.logback.classic.LoggerContext.setName(LoggerContext.java:107)
at at ch.qos.logback.classic.joran.action.ContextNameAction.body(ContextNameAction.java:31)
at at ch.qos.logback.core.joran.spi.Interpreter.callBodyAction(Interpreter.java:296)
at at ch.qos.logback.core.joran.spi.Interpreter.characters(Interpreter.java:176)
at at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:57)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:157)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:143)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:106)
at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:56)

Is this expected behavior? After all, loggerContext.reset() has been called and I'd assume that this would also reset the contextName. Feels like a bug.