"This is definitely their bug", as a programmer, do you hear such a voice. Our system is developed based on Domino. It is now applying to a IT company with three thousand people, and the daily access is still very visible. Our system is very good, many people like it. But we have been being made by a problem, that is, our HTTP process does not know when it will be changing, maybe it is night, maybe it is two worships, maybe it is a minute, although it is not very frequent. But we must solve this problem. We probably study some of the IBM's code and our own code, try to do some changes to our code. We also invite IBM technical support, the result is still the same. At this time, everyone believes that this is definitely IBM's bug. It is not just a JDK problem. After this conclusion, we almost give up. But after a few days, we suddenly understood that the recycling and threads of the Java object under Domino seem to be the same as our previous treatment. That is, our processing method may have to make a change. Maybe some moves cannot be concurrent. We improve our approach and the system is indeed stable. Although there is still the existence, it is much better than before these days. And today we have discovered our code, there are additional defects, I believe this will solve our problem. We also got an experience. Don't say that this is their bug, the problem is not solved, that is, our code is not so perfect.