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question asked: Jun 03 '15, 4:38 p.m.
question was seen: 3,069 times
last updated: Jun 03 '15, 8:55 p.m.

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What can cause a gap between RTC Work Item IDs?

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Richard Michelson (21●7●15) | asked Jun 03 '15, 4:38 p.m.
We've noticed that a Work Item ID for new Work Item does not always follow sequentially from the last created Work Item. We just had a case where we created a Work Item (ID was 16928), rebooted the RTC server, and the next Work Item created had an ID of 17001. Why this gap in IDs? Is this to be expected after a reboot?

We're running RTC 5.0.1, using Tomcat, and an Oracle database, Linux server.

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sam detweiler (12.5k●6●195●201) | answered Jun 03 '15, 5:45 p.m.
the rules for incrementing the workitem  id counter are not documented.

there is only one counter for an entire CCM instance, and that means all projects share the same counter.
so a new workitem in project C might get 9, project A will get 10, in project B maybe 11, and project C again might get 12.   while the number are sequential, they do not appear that way, as u can only see workitems one project at a time.

there have been discussions that an id is assigned to a workitem when the create workitem request is done, even if that workitem creation is abandoned. (so that number is not used at all)
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Richard Michelson commented Jun 03 '15, 5:56 p.m.

 We only have a single Project Area, so that is not our issue. Any other thoughts? The last occurrence of this happening (with a gap of 73, jumping from 16928 to 17001) was immediately after rebooting the server.

sam detweiler commented Jun 03 '15, 6:00 p.m.

sorry, no idea..

gotta ask, why do you care? is there some process you might depend on sequential  numbers? (which IBM does not guaranty)

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Geoffrey Clemm (30.1k●3●30●35) | answered Jun 03 '15, 8:55 p.m.
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I vaguely recall that there are parts of the system that allocate a "batch" of ID's, so they don't have to keep asking the server for a new ID one-by-one.   The important qualifier here is "vaguely recall" (:-).

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