import org.slf4j.LoggerFactory;

public class TestLogBack {

	public TestLogBack() {
		super();
	}

	public static void main(String[] args) {
		TestLogBack test = new TestLogBack();
		test.execute();
	}

	private void execute() {
		org.slf4j.Logger logger = LoggerFactory.getLogger(TestLogBack.class);
		//test
		try {
			throw new TestLogBackException("Test: getStackTrace() return null"); //$NON-NLS-1$
		} catch (Throwable t) {
			logger.error("Messaggio di Test di {}", t.getMessage(), t); //$NON-NLS-1$
		}
	}

	class TestLogBackException
			extends Exception {

		private static final long serialVersionUID = 1L;

		public TestLogBackException(String message) {
			super(message);
		}

		@Override
		public StackTraceElement[] getStackTrace() {
			return null;
		}
	}

}

Exception in thread "main" java.lang.NullPointerException
	at ch.qos.logback.classic.spi.ThrowableProxyUtil.steArrayToStepArray(ThrowableProxyUtil.java:42)
	at ch.qos.logback.classic.spi.ThrowableProxy.<init>(ThrowableProxy.java:35)
	at ch.qos.logback.classic.spi.LoggingEvent.<init>(LoggingEvent.java:123)
	at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:469)
	at ch.qos.logback.classic.Logger.filterAndLog_2(Logger.java:462)
	at ch.qos.logback.classic.Logger.error(Logger.java:580)
	at z_prove.logback.TestLogBack.execute(TestLogBack.java:28)
	at z_prove.logback.TestLogBack.main(TestLogBack.java:13)