Hello all, Revision 2170, even if many classes were affected, is conceptually a minor refactoring of the LoggingEvent class. LoggingEvent class now is an implementation of the ILoggingEvent interface shown below: public interface ILoggingEvent extends SDOAware { public String getThreadName(); public Level getLevel(); public String getMessage(); public LoggerRemoteView getLoggerRemoteView(); public String getFormattedMessage(); public Object[] getArgumentArray(); public ThrowableProxy getThrowableProxy(); public CallerData[] getCallerData(); public Marker getMarker(); public Map<String, String> getMDCPropertyMap(); public long getTimeStamp(); public long getContextBirthTime(); public void prepareForDeferredProcessing(); } The getContextBithTime method replaces getStartTime() method in LoggingEvent. The intent is to separate the concern of serialization from LoggingEvent. Serialization code has moved into LoggingEventSDO (SDO=Serializable Data Object). The SDOAware interface contains a single method: public interface SDOAware { Serializable getSDO(); } I would like to continue working until we arrive at a situation where LoggingEventSDO better insulated from changes in LoggingEvent or sub-components thereof. We are there not there yet. Revision 2170 is just the first step in what I hope to be the right direction. Your comments are welcome. -- Ceki Gülcü Logback: The reliable, generic, fast and flexible logging framework for Java. http://logback.qos.ch