Currently logback context selector only supports Joran (XML) configuration. When a groovy file is given an XML parser exception occurs. If the file ends in .groovy, the configuration should use the groovy interpreter instead of the XML Parser.

INFO | jvm 1 | 2010/08/12 15:27:56 | 15:27:56,063 |-ERROR in ch.qos.logback.core.joran.event.SaxEventRecorder@13eaab - Parsing fatal error on line 1 and column 1

Here's the relevant part of the stack trace.

org.xml.sax.SAXParseException: Content is not allowed in prolog.
...
INFO | jvm 1 | 2010/08/12 15:27:56 | at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:52)
INFO | jvm 1 | 2010/08/12 15:27:56 | at at ch.qos.logback.classic.selector.ContextJNDISelector.configureLoggerContextByURL(ContextJNDISelector.java:161)
INFO | jvm 1 | 2010/08/12 15:27:56 | at at ch.qos.logback.classic.selector.ContextJNDISelector.getLoggerContext(ContextJNDISelector.java:105)
INFO | jvm 1 | 2010/08/12 15:27:56 | at at org.slf4j.impl.StaticLoggerBinder.getLoggerFactory(StaticLoggerBinder.java:108)
INFO | jvm 1 | 2010/08/12 15:27:56 | at at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:273)
INFO | jvm 1 | 2010/08/12 15:27:56 | at at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241)