Order of log lines is mixed when 3rd party logs write directly to SLF4J

[Natanel Savion]

Hi,

While using in akka's infrastructure (akka.event.Logging), log lines are written asynchronously.

If 3rd party code that writes directly to SLF4J runs within the context of an actor, this can lead to condition where akka code performed before the 3rd party code only gets logged after the 3rd party log due to the time it takes the logs to be written async.

%X{akkaTimestamp} (see http://doc.akka.io/docs/akka/current/java/logging.html#more-accurate-timestamps-for-log-output-in-mdc) can be used to reorder the log but sometimes the timestamp resolution is not sufficient to reliably order the lines.

Was wondering if someone else may have encountered this problem and came-up with some solution. 

Currently, we are considering writing all our logs directly to SLF4J to avoid this issue (the SLF4J back-end can be configured with an async appender to provide similar functionality).

Thanks,

Nati

 

[Konrad Malawski]

You can always just us slf4j directly - use an async appender in the impl (logback2 AFAIR provides one and others as well) and you're good.

There's no requirement to use ActorLogging, we only have it to not depend on a specific logging API in akka-actor itself.

-- 
Konrad `ktoso` Malawski
Akka @ Lightbend

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[Natanel Savion]

Thanks for the quick response!