policy.setFileNamePattern(/var/logs/archived_"+discriminatingValue+"_%d{yyyy_MM_dd}_%i.log");
policy.setMaxHistory(365);
policy.setCleanHistoryOnStart(true);
innerpolicy.setMaxFileSize("5KB");

LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
		
SiftingAppender connectorAppender = new SiftingAppender();
connectorAppender.setContext(loggerContext);
connectorAppender.setName("SIFTING_APPENDER");
		
MDCBasedDiscriminator discriminator = new MDCBasedDiscriminator();
discriminator.setKey("SKEY");
discriminator.setDefaultValue("DEF_KEY");
discriminator.start();
connectorAppender.setDiscriminator(discriminator);

connectorAppender.setAppenderFactory(new AppenderFactory<ILoggingEvent>() {

	@Override
	public Appender<ILoggingEvent> buildAppender(Context context, String discriminatingValue) throws JoranException {

		RollingFileAppender<ILoggingEvent> appender = new RollingFileAppender<>();
		appender.setName("ROLLING_APPENDER_"+discriminatingValue);
		appender.setContext(context);
		appender.setFile("/var/logs/active_"+discriminatingValue+".log");

		TimeBasedRollingPolicy<ILoggingEvent> policy = new TimeBasedRollingPolicy<>();
		policy.setContext(context);
		policy.setMaxHistory(365);
		policy.setFileNamePattern(/var/logs/archived_"+discriminatingValue+"_%d{yyyy_MM_dd}_%i.log");
		policy.setParent(appender);
		policy.setCleanHistoryOnStart(true);
		policy.start();

		SizeAndTimeBasedFNATP<ILoggingEvent> innerpolicy = new SizeAndTimeBasedFNATP<>();
		innerpolicy.setContext(context);
		innerpolicy.setMaxFileSize("5KB");
		innerpolicy.setTimeBasedRollingPolicy(policy);
		innerpolicy.start();

		policy.setTimeBasedFileNamingAndTriggeringPolicy(innerpolicy);
		policy.start();
		appender.setRollingPolicy(policy);

		PatternLayoutEncoder pl = new PatternLayoutEncoder();
		pl.setContext(context);
		pl.setPattern("%d{yyyy/MM/dd'T'HH:mm:ss} %-5level - %msg\n");

		pl.start();
		appender.setEncoder(pl);

		appender.start();
		return appender;
	}
});
connectorAppender.start();
	
ch.qos.logback.classic.Logger logger = (ch.qos.logback.classic.Logger)LoggerFactory.getLogger("org.test");
logger.addAppender(connectorAppender);
logger.setLevel(Level.DEBUG);
logger.setAdditive(false);

MDC.put("SKEY", "K1");
logger.info("bla1");
MDC.clear();
	
MDC.put("SKEY", "K2");
logger.info("bla2");
MDC.clear();

17:02:56,382 |-ERROR in ch.qos.logback.classic.sift.SiftingAppender[SIFTING_APPENDER] - Appender [SIFTING_APPENDER] failed to append. java.lang.IllegalArgumentException: Cannot convert Mon Feb 09 00:00:00 CET 2015 of typejava.util.Date
	at java.lang.IllegalArgumentException: Cannot convert Mon Feb 09 00:00:00 CET 2015 of typejava.util.Date
	at 	at ch.qos.logback.core.rolling.helper.IntegerTokenConverter.convert(IntegerTokenConverter.java:40)
	at 	at ch.qos.logback.core.rolling.helper.FileNamePattern.convert(FileNamePattern.java:137)
	at 	at ch.qos.logback.core.rolling.helper.TimeBasedArchiveRemover.cleanByPeriodOffset(TimeBasedArchiveRemover.java:28)
	at 	at ch.qos.logback.core.rolling.helper.DefaultArchiveRemover.clean(DefaultArchiveRemover.java:71)
	at 	at ch.qos.logback.core.rolling.TimeBasedRollingPolicy.start(TimeBasedRollingPolicy.java:100)
	at 	at org.jga.camel.AppDispatcher$1.buildAppender(AppDispatcher.java:134)
	at 	at ch.qos.logback.core.sift.AppenderTracker.buildComponent(AppenderTracker.java:57)
	at 	at ch.qos.logback.core.sift.AppenderTracker.buildComponent(AppenderTracker.java:32)
	at 	at ch.qos.logback.core.spi.AbstractComponentTracker.getOrCreate(AbstractComponentTracker.java:124)
	at 	at ch.qos.logback.core.sift.SiftingAppenderBase.append(SiftingAppenderBase.java:105)
	at 	at ch.qos.logback.core.AppenderBase.doAppend(AppenderBase.java:85)
	at 	at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)
	at 	at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:273)
	at 	at ch.qos.logback.classic.Logger.callAppenders(Logger.java:260)
	at 	at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:442)
	at 	at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:396)
	at 	at ch.qos.logback.classic.Logger.info(Logger.java:600)
	at 	at org.jga.camel.connectors.Conn1.doWork(Conn1.java:13)
	at 	at org.jga.camel.AppDispatcher.main(AppDispatcher.java:173)