Talk to your basis people about number allocations to the application servers.
You have more than one application server in use in your organization. To increase performance, for many number objects in SAP, the application servers are each assigned a chunk of numbers at a time for each number object. Basis can change these allocations to be one at a time, i.e. real time, or in large chunks like 10 numbers at a time per server. Once the DB has assinged the numbers to the application servers they are considered 'used'. If a server goes down, the unused numbers are lost.
So... if Mr. Smith logged in and was assigned to application server XYZ he might get number 40000023. When Mr Jones logs in he might be put in through server STW. His number for the same object might be 40000018. Hence notification 400000023 was created first. The next notification Mr. Smith creates will be 400000024, while the next one Mr. Jones creates will be 400000019. When Mr, Jones creates a third number, his server could be out of numbers, (40000020-400000029 went to server XYZ, 400000010 - 400000019 were on server STW). In this case the application server asks the DB for another chunk of numbers which will be 400000030 - 400000039. So he'll get 400000030 as his next number.
If server STW went down, it would get a new group of numbers, 400000040 -400000049. The unused numbers (400000031 - 400000039) would be lost forever.
This can also happen with inspection lot numbering as well.
Craig
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