Slf4jLoggingFilter/logback level filtering issue

[vacuumstate]

Hi,

I'm having trouble trying to get logging working as per standard akka documentation.

The application consists of several scala/sbt assembly jars deployed to a 'bin' folder along with their *.conf HOCON and logback.xml files (which are excluded from the assembly packaging).

The issue is with trying to get the level filtering working i.e. it doesn't have any effect; - with all levels set to "warning' in logback.xml, I'm still getting debug and info logging output.

The logback.xml must be used to some extent, because the log output is matching the logback.xml pattern.

A log.conf is included by the other conf files:

akka {

  log-dead-letters = 0

  log-dead-letters-during-shutdown = off

  warn-about-java-serializer-usage = off

  loglevel = DEBUG

  stdout-loglevel = WARNING

  loggers = ["akka.event.slf4j.Slf4jLogger"]

  logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"

}

And here is the logback.xml

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">

        <target>System.out</target>

        <encoder>

            <pattern>%X{akkaTimestamp}| %-6level| %logger{36}| %X{sourceActorSystem}| %msg%n</pattern>

        </encoder>

    </appender>

    <logger name="akka" level="error" />

    <logger name="akka.cluster.Cluster" level="error" />

    <logger name="jobs" level="warning" />

    

    <root level="warning">

        <appender-ref ref="CONSOLE"/>

    </root>

</configuration>

And here are the library dependencies from one of the build.sbt files (scala version is 2.12.1):

libraryDependencies ++= {

  val akkaVersion = "2.4.16"

  Seq(

    "org.scala-lang"          % "scala-reflect"                       % "2.12.1",

    "org.scala-lang.modules"  % "scala-xml_2.12"                      % "1.0.6",

    "com.typesafe.akka"       %% "akka-actor"                         % akkaVersion,

    "com.typesafe.akka"       %% "akka-slf4j"                         % akkaVersion,

    "com.typesafe.akka"       %% "akka-remote"                        % akkaVersion,

    "com.typesafe.akka"       %% "akka-cluster"                       % akkaVersion,

    "com.typesafe.akka"       %% "akka-cluster-tools"                 % akkaVersion,

    "ch.qos.logback"          %  "logback-classic"                    % "1.1.8",

    "org.eclipse.persistence" % "eclipselink"                         % "2.6.4",

    "javax.el"                % "javax.el-api"                        % "3.0.0",

    "com.typesafe.akka"       %% "akka-multi-node-testkit"            % akkaVersion   % "test",

    "com.typesafe.akka"       %% "akka-testkit"                       % akkaVersion   % "test",

    "org.scalatest"           %% "scalatest"                          % "3.0.1"       % "test",

    "com.novocode"            % "junit-interface"                     % "0.11"        % "test"

  )

}

I'd appreciate any clues on how to resolve this!

Thanks,

Rob.

[Viktor Klang]

run the app with -Dakka.log-config-on-start=on

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Cheers,

√

[vacuumstate]

So I investigated running the app with  -Dakka.log-config-on-start=on.

I couldn't get any associated config output until I reverted log.conf to use the default logger:

akka {
  log-config-on-start=on

  log-dead-letters = 0
  log-dead-letters-during-shutdown = off
  warn-about-java-serializer-usage = off

  loglevel = INFO
  stdout-loglevel = INFO
  loggers = ["akka.event.Logging$DefaultLogger"]
  //loggers = ["akka.event.slf4j.Slf4jLogger"]
  //logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"
}

...and then I get loads of config output to the log, especially from reference.conf dragged in from some other dependency.

Clearly, my understanding of how {assembly fat jars, configuration loading, external config files, slf4j, logback} hang together is not complete!

I'll continue investigation as to why I get no output (at all) with:

akka {
  log-dead-letters = 0
  log-dead-letters-during-shutdown = off
  warn-about-java-serializer-usage = off

  loglevel = INFO
  stdout-loglevel = INFO

  loggers = ["akka.event.slf4j.Slf4jLogger"]
  logging-filter = "akka.event.slf4j.Slf4jLoggingFilter"
}

and

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <target>System.out</target>
        <encoder>

            <pattern>!check! %X{akkaTimestamp}| %-6level| %logger{36}| %X{sourceActorSystem}| %msg%n</pattern>

        </encoder>
    </appender>

    <logger name="akka" level="error" />
    <logger name="akka.cluster.Cluster" level="error" />

    <logger name="jobs" level="info" />
    <logger name="jobsHttp" level="info" />

    <root level="info">

[vacuumstate]

I'll admit that it is in fact working as expected - apologies.

To recap the pieces relating to the fact I'm using assembly jars with external configuration files:

- exclude the config files from the assembly jars using sbt-assembly MergeStrategy.discard

- in code use ConfigFactory.load() together withFallback where necessary in conjunction with:

- specify -Dconfig.file=<each specific external conf file> when executing java with the assembly jar

- specify -Dlogback.configurationFile=./logback.xml

- follow the steps from the documentation