[LOG4J2-793] Log4jLogger only accepts Log4jMarker, not SLF4J's Marker

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 2.1
• Assignee: Matt Sicker
• Reporter: Manfred Dohmen
• Created: 21/Aug/14 15:41
• Updated: 26/Aug/14 03:53
• Resolved: 26/Aug/14 03:53

Description

We're using Log4j 2 via SLF4J. A Logger's log methods have signatures like this:
public abstract void warn(org.slf4j.Marker marker, java.lang.String msg)

If you use an object that is an Marker but not a Log4jMarker this fails at org.apache.logging.slf4j.Log4jLogger.getMarker(Log4jLogger.java:378) due to "cannot be cast to org.apache.logging.slf4j.Log4jMarker".

Use case: we have a defined set of Markers. There's an enum for this, implementing SLF4J's marker interface. Obviously with Log4j we cannot use this enum.

I think an org.apache.logging.slf4j.Log4jLogger cannot expect an org.apache.logging.slf4j.Log4jMarker.