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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => havana-1

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https://bugs.launchpad.net/bugs/1152475

Title:
  nova-api coverage data contains other services' data after a combined
  report

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  When creating a combined coverage report, nova services' coverage data are combined into nova-api's.
  So if combining a coverage report once, the next nova-api coverage report doesn't indicate that of just nova-api.

  Example:

   [not combine data]
    $ nova coverage-start
    $ nova boot --image cirros-0.3.1-x86_64-uec --flavor 1 --poll server01
    $ nova coverage-report report
    $ nova coverage-start
    $ nova coverage-report report01

    coverage data of report01.api is:

    Name                                                                                        Stmts   Miss Branch BrPart  Cover   Missing
    ---------------------------------------------------------------------------------------------------------------------------------------
    nova/compute/manager                                                                         1762   1762    483    483     0%   20-3853
    nova/conductor/manager                                                                        233    233     42     42     0%   15-424
    nova/scheduler/manager                                                                        116    116     32     32     0%   20-296

   [combine data]
    $ nova coverage-start --combine
    $ nova boot --image cirros-0.3.1-x86_64-uec --flavor 1 --poll server01
    $ nova coverage-report report
    $ nova coverage-start
    $ nova coverage-report report02

    coverage data of report02.api is:

    Name                                                                                        Stmts   Miss Branch BrPart  Cover   Missing
    ---------------------------------------------------------------------------------------------------------------------------------------
    nova/compute/manager                                                                         1762   1621    483    453     8%   20-45, 50-51, 57-191, 195-220, 224-238, 248, 261-264, 270-275, 280-301, 305, 311, 315-318, 323-351, 354-362, 365, 374-375, 379-383, 392-393, 396-523, 530-548, 552-588, 593-658, 664, 670-722, 733, 742, 748, 751-752, 758, 790-809, 822-906, 913-923, 936-949, 952-954, 972, 976-982, 993-1010, 1020, 1036-1038, 1046, 1050-1055, 1067-1079, 1091-1145, 1151, 1153, 1165-3163, 3177, 3180, 3188-3193, 3198-3216, 3219-3224, 3227-3244, 3247-3300, 3303-3348, 3355-3456, 3460-3487, 3491-3538, 3548-3660, 3668-3683, 3694-3853
    nova/conductor/manager                                                                        233    192     42     35    17%   15-54, 63-85, 89-91, 100-105, 110-113, 121, 125-134, 140-207, 212, 217, 221-235, 240-286, 290, 294-330, 334, 338-350, 355-359, 364-389, 392, 395-424
    nova/scheduler/manager                                                                        116    104     32     27    11%   20-76, 80, 83, 87-103, 114, 128-284, 288-296

  Report01.api indicates the data of just nova-api but report02.api
  doesn't.

  Appendix:
  To measure nova services' coverage data, add "backdoor_port=0" in nova.conf.

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