Oh I cause that bug. It is not relate to the unsigned integer problem. Because the counter of the inflow will be zero when the agent restart. for example, the agent network infolw now is 1000000000,and it save to the DB and the agent machine reatart. the network infolw will set to zero. When the server get the "Net.Interface.BytesIn(eth0)" from the same agent again. 0 mimus 1000 is a negative number.
So That bug cause:
1)when the agent machine restart
2)the first point I have said above.
So That bug cause:
1)when the agent machine restart
2)the first point I have said above.