hseeberger/akka-log4j

Logging backend for Akka based on Log4j

akka-log4j's Issues

"Empty List" issue

when i'm trying to run an app this issue occurs:

[ERROR] [07/29/2017 10:38:46.509] [system-akka.actor.default-dispatcher-2] [akka://system/system/log1-Log4jLogger] head of empty list
java.util.NoSuchElementException: head of empty list
	at scala.collection.immutable.Nil$.head(List.scala:420)
	at scala.collection.immutable.Nil$.head(List.scala:417)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
	at akka.actor.ActorCell.invoke(ActorCell.scala:495)
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
	at akka.dispatch.Mailbox.run(Mailbox.scala:224)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
	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)

[ERROR] [07/29/2017 10:38:46.524] [system-akka.actor.default-dispatcher-2] [akka://system/system/log1-Log4jLogger] changing Recreate into Create after java.util.NoSuchElementException: head of empty list
[ERROR] [SECURITY][07/29/2017 10:38:46.872] [system-akka.actor.default-dispatcher-2] [akka.actor.ActorSystemImpl(system)] Uncaught error from thread [system-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled
Uncaught error from thread [system-akka.actor.default-dispatcher-2] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[system]
java.lang.NoSuchMethodError: akka.actor.Actor.$init$(Lakka/actor/Actor;)V
	at de.heikoseeberger.akkalog4j.Log4jLogger.<init>(Log4jLogger.scala:61)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at java.lang.Class.newInstance(Class.java:442)
	at akka.util.Reflect$.instantiate(Reflect.scala:44)
	at akka.actor.NoArgsReflectConstructor.produce(IndirectActorProducer.scala:105)
	at akka.actor.Props.newActor(Props.scala:213)
	at akka.actor.ActorCell.newActor(ActorCell.scala:562)
	at akka.actor.ActorCell.create(ActorCell.scala:588)
	at akka.actor.dungeon.FaultHandling$class.finishCreate(FaultHandling.scala:136)
	at akka.actor.dungeon.FaultHandling$class.faultCreate(FaultHandling.scala:130)
	at akka.actor.ActorCell.faultCreate(ActorCell.scala:374)
	at akka.actor.dungeon.FaultHandling$class.faultRecreate(FaultHandling.scala:59)
	at akka.actor.ActorCell.faultRecreate(ActorCell.scala:374)
	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:464)
	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:483)
	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)
	at akka.dispatch.Mailbox.run(Mailbox.scala:223)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

there is a simple project affected by this issue
https://github.com/sshaddicts/neuralswarm/tree/issue-with-log4j2

pom.xml
application.conf
log4j2.xml

Support log4j2's Message objects

Hi @hseeberger, thanks for the great library!

Support for logging Message objects directly would be very beneficial for structured logging, something most libraries do using MDC. MDC, however, is not threadsafe and generally painful to use in Akka (can't log from Future callbacks, for example).

I'll gladly send a PR for this feature. What do you think?

All logging filter like akka.event.slf4j.Slf4jLoggingFilter (2.4 M1)

SLF4J to Log4j Bridge missing

Hi,

When adding akka-log4j I'm receiving the following error message:

[ERROR] SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[ERROR] SLF4J: Defaulting to no-operation (NOP) logger implementation
[ERROR] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

This can be easily fixed by adding the following dependency:

"org.apache.logging.log4j" % "log4j-slf4j-impl" % Version.Log4j

It prevents other projects from having to add this library themselves.

BR,
Miel

Add example of usage to docs

Can you add example how to use it?

Upgrade to Akka 2.4.2-RC1

Pls, release new version

Log4j 2.6 issue or plugin?

I just tested my application with Log4j 2.6 and it wouldn't even start, no error message, etc, I'm not sure if is related to akka-log4j or log4j 2.6 issue, I'm wondering if it can be reproduced by trying to run the tests?