I'm migrating from log4j to slf4j/logback but I'm facing a problem running on Google App Engine. Locally it works fine but on Google infra I get: 2013-04-08 20:35:49.900 [s~myapp/0-1.366534131644586896].<stderr>: Failed to instantiate [ch.qos.logback.classic.LoggerContext] W 2013-04-08 20:35:49.902 [s~myapp/0-1.366534131644586896].<stderr>: Reported exception: There isn't displayed any additional info unfortunately. I read about earlier problems with InetAddress, but this class is on whitelist of latest GAE SDK version which I'm using (1.7.6). I wonder if other people are abe to setup logback on GAE? It would be a real pity if I've to revert back to log4j... -- View this message in context: http://logback.10977.n7.nabble.com/Failed-to-instantiate-ch-qos-logback-clas... Sent from the Users mailing list archive at Nabble.com.