Using Java, the execution of a program, it is need to record the start time in the library, over time, the failure time, the problem is in the database time now exist all sorts of abnormal data, what reason may (1970/1/1 00.22.45 or 0302/3/5 11.24.26 this), preliminary read, read the system time (emmmm don't influence your judgment), the machine has 5 running instance,