System Time Problem

[Desmond Foo]

Dear All,   I've got an IBM x230 Server here running on Redhat Linux 6.2. The server executes a set of scheduled batch jobs everyday based on a specific time set in crontab. Each time before the cron jobs are executed, the starting and the ending of the cron job execution times are captured and output to a log file.   Now, just recently we've discovered an odd occurrence on the times captured in the log file. The ending time of the execution of a cron job has somehow appeared to be earlier than its starting time. Can anyone tell me what actually happened? How is it that the system time went reverse during that period when the cron jobs were being executed?   Thanks.   Best Regards, Desmond Foo