What about Year 2038 problems?
The problem arises since 32-bit signed long integers will overflow and become negative once the number of seconds exceeds 2 to the power of 31. It so happens that the number of seconds from 1970 to 2038 is about 2 to the power of 31, so it is possible that during the year 2038, Unix systems will suddenly register the date as being prior to 1970.
GraphApp has no code which relies on the date being recorded as seconds since 1970, and therefore should not experience any such problems.
Are there any other related time problems?
These millisecond measurements will overflow in about 24 days, since there are 2 to the power of 31 milliseconds in that time. Hence, a GraphApp program which relies on these timing measurements should not be left running for longer than that time.