Investigations Auto Assigner

TeamCity can analyse build problems (for example, compilation errors) and test failures, and try to find a committer to blame for the problem using a number of heuristics.

For test failures, there is a suggestion to assign an investigation to this user: you can review the suggestion and assign the user to investigate the failure.

In addition to suggestions, you can now configure the Investigations Auto Assigner build feature. It will use the same heuristics to enable automatic assignment of investigations, and not only for a test failure but also for build problems.

When configuring the build feature, you can specify:

• the TeamCity username of the default user whom investigations will be assigned to in case it is not clear whose changes actually broke the build

• the list of usernames to exclude from assigning investigations (for example, system users or the users no longer working on the project)

After this build feature is added to a build configuration, the user is assigned to investigate a failure on the basis of the following heuristics:

• If a user is the only committer to the build.

• If a user is the only one who changed the suspicious file. The suspicious file is the one which probably caused this failure, i.e. its name appears in the test or build problem error text.

• If a user was responsible for this problem the previous time.

• If a user is set as the default responsible user.

If you have not configured this build feature, TeamCity will show a suggestion for investigation assignment with the reason for the possible assignment.

If necessary, you can delay auto-assignment of investigations.
TeamCity needs time after the build finish to detect flaky tests, and in some cases Investigations Auto Assigner may assign an investigation to a user even if the build fails without any user involvement. When there are many flaky tests in a project, this may be distracting.
To prevent this scenario, select Assign: "On second failure" when configuring this build feature. Investigations Auto Assigner will be delaying the assignment until the problem repeats in a build configuration twice in a row (in the default branch). This option affects only failed tests and "Exit code" build problems; any compilation errors will be assigned with an investigation right on the first failure.