Hi Pedro, logback returns a SubstituteLoggerFactory <http://www.slf4j.org/api/org/slf4j/helpers/SubstituteLoggerFactory.html> when a LoggerFactory is requested before the logging system is loaded completely (see also: http://www.slf4j.org/codes.html#substituteLogger). Casting this to a LoggerContext fails. If you are assigning the returned LoggerFactory to a val it might already help, if you used a lazy val instead.
HTH Volker On Wednesday, June 4, 2014 11:00:06 AM UTC+2, Pedro Ferreira de Almeida wrote: > > Hi, fellow hAkkers! > > > I'm quite a newcomer to the whole Akka (as well as Scala) scene so I'm not > completely familiarized with some techniques. > > I have built a very, very simple Logging trait using SLF4J and Logback. By > now I'm able to save logs on MongoDB, using ReactiveMongo driver (which is > built on Akka, curiously). > It works quite well with non-actor entities. However, with actors, it > semi-works... basically, if I have, say, a Consumer and a Producer, I can't > get a logger working for Consumer but it works for Producer... =/ > > SLF4J just throws me this exception in the face : > > [ERROR] [06/04/2014 09:51:52.860] > [kafka-workers-akka.actor.default-dispatcher-2] > [akka://kafka-workers/user/consumer] > org.slf4j.helpers.SubstituteLoggerFactory cannot be cast to > ch.qos.logback.classic.LoggerContext > akka.actor.ActorInitializationException: exception during creation > at akka.actor.ActorInitializationException$.apply(Actor.scala:164) > at akka.actor.ActorCell.create(ActorCell.scala:596) > at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456) > at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478) > at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:263) > at akka.dispatch.Mailbox.run(Mailbox.scala:219) > at > akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) > at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) > at > scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) > at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) > at > scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) > Caused by: java.lang.ClassCastException: > org.slf4j.helpers.SubstituteLoggerFactory cannot be cast to > ch.qos.logback.classic.LoggerContext > at > com.ignidata.core.logging.LogFactory$.createLoggerContext(LoggerFactory.scala:68) > at > com.ignidata.core.logging.LogFactory$.createLogger(LoggerFactory.scala:40) > at > com.ignidata.core.logging.persistence.Logging$class.$init$(Logging.scala:22) > at > com.ignidata.core.integration.KafkaAkkaConsumer.<init>(KafkaAkkaConsumer.scala:20) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:526) > at java.lang.Class.newInstance(Class.java:374) > at akka.util.Reflect$.instantiate(Reflect.scala:45) > at akka.actor.NoArgsReflectConstructor.produce(Props.scala:358) > at akka.actor.Props.newActor(Props.scala:249) > at akka.actor.ActorCell.newActor(ActorCell.scala:552) > at akka.actor.ActorCell.create(ActorCell.scala:578) > ... 9 more > > [INFO] [06/04/2014 09:51:52.905] > [kafka-workers-akka.actor.default-dispatcher-4] > [akka://kafka-workers/user/consumer] Message [scala.Tuple4] from > Actor[akka://kafka-workers/deadLetters] to > Actor[akka://kafka-workers/user/consumer#-91164000] was not delivered. [1] > dead letters encountered. This logging can be turned off or adjusted with > configuration settings 'akka.log-dead-letters' and > 'akka.log-dead-letters-during-shutdown'. > [INFO] [06/04/2014 09:51:52.915] > [kafka-workers-akka.actor.default-dispatcher-5] > [akka://kafka-workers/user/consumer] Message [java.lang.String] from > Actor[akka://kafka-workers/deadLetters] to > Actor[akka://kafka-workers/user/consumer#-91164000] was not delivered. [2] > dead letters encountered. This logging can be turned off or adjusted with > configuration settings 'akka.log-dead-letters' and > 'akka.log-dead-letters-during-shutdown'. > 09:51:53,376 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - > About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] > 09:51:53,388 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - > Naming appender as [STDOUT] > 09:51:53,444 |-INFO in > ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default > type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] > property > 09:51:53,555 |-INFO in > ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of > ROOT logger to DEBUG > 09:51:53,555 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction > - Attaching appender named [STDOUT] to Logger[ROOT] > 09:51:53,557 |-INFO in > ch.qos.logback.classic.joran.action.ConfigurationAction - End of > configuration. > 09:51:53,559 |-INFO in > ch.qos.logback.classic.joran.JoranConfigurator@13836c80 - Registering > current configuration as safe fallback point > 09:51:53,619 |-INFO in ch.qos.logback.classic.net.SyslogAppender[null] - > Defaulting maxMessageSize to [65000] > 09:51:53.660 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Creating producer with config: > (page-visits,localhost:9092,true,false,200,3) > log4j:WARN No appenders could be found for logger > (kafka.utils.VerifiableProperties). > log4j:WARN Please initialize the log4j system properly. > 09:51:54.984 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Created producer with config: > (page-visits,localhost:9092,true,false,200,3) > 09:51:55.039 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Message about to be sent: test 1 > 09:51:56.928 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Message sent: test 1 > 09:51:56.966 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Message about to be sent: test 2 > 09:51:57.142 [kafka-workers-akka.actor.test-dispatcher-7] INFO > c.i.c.integration.KafkaAkkaProducer - Message sent: test 2 > > > So you see, both Consumer and Producer mix the same trait, but only the > last one manages to get a logger instance. > > Something anyone has seen at some point? How have you manage to work > around it? > > Thanks for your help! > Pedro > -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
