Minor patch to avoid possible integer overflow in DayPart.add() in case of crazy Calendar values ------------------------------------------------------------------------------------------------ Key: JBPM-1059 URL: http://jira.jboss.com/jira/browse/JBPM-1059 Project: JBoss jBPM Issue Type: Patch Affects Versions: jBPM 3.1.4, jBPM jPDL 3.2.2 Reporter: Johan Parent Assigned To: Alejandro Guizar Fix For: jBPM 3.1.5, jBPM jPDL 3.2.3 In public Date add(Date date, Duration duration) { Date end = null; Calendar calendar = BusinessCalendar.getCalendar(); calendar.setTime(date); int hour = calendar.get(Calendar.HOUR_OF_DAY); int minute = calendar.get(Calendar.MINUTE); long dateMilliseconds = ((hour*60)+minute)*60*1000; long dayPartEndMilleseconds = ((toHour*60)+toMinute)*60*1000; change last two lines into: long dateMilliseconds = ((hour*60L)+minute)*60*1000; long dayPartEndMilleseconds = ((toHour*60L)+toMinute)*60*1000;