Just a quick fix to a problem I ran into, putting it out there just in case it helps someone. Ignore this post if you haven't run into this exception.

While configuring logback in order to filter out a bunch of redis.actors.RedisClientActor messages (tangential note: rediscala WTF?) I ran into the following error:

Failed to instantiate [ch.qos.logback.classic.LoggerContext]
Reported exception:
java.lang.NoClassDefFoundError: org/codehaus/janino/ScriptEvaluator
        at ch.qos.logback.core.boolex.JaninoEventEvaluatorBase.start(JaninoEventEvaluatorBase.java:57)
        at ch.qos.logback.core.joran.action.NestedComplexPropertyIA.end(NestedComplexPropertyIA.java:167)

        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.ClassNotFoundException: org.codehaus.janino.ScriptEvaluator
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)

Turns out that to use the ch.qos.logback.core.filter.EvaluatorFilter (which allows you to filter log messages by regex), you need to include the following dependency in addition to logback:

"org.codehaus.janino" % "janino" % "2.6.1"


(Take your pick whether you prefer sbt or maven.)

You can also suppress rediscala log messages by putting:

rediscala {
  loglevel = "ERROR"

into your application.conf.

Just putting this on the interwebs in the hope someone finds it useful.

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