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Numerous fuzzer tasks have been disabled under tsan as they time out (SERVER-89937, SERVER-91553). For master, this was achieved by tagging tasks in tasks.yml files with incompatible_tsan. However, that tag is not considered in v8.0. The earliest reference to !.incompatible_tsan appears to be this commit, for SERVER-88648, in test_dev_master_branch_only.yml. This is then restructured in this commit for SERVER-89460, now appearing in test_dev.yml. As relevant tests already apply the tag, the simplest solution to make v8.0 consistent is to have test_dev.yml not run tests with the tag incompatible_tsan. This is a better solution than, for example, entirely removing the entry: tasks: ... - name: .config_fuzzer As future devs may change other fuzzer tests which are suitable to run under tsan (and thus, are not tagged incompatible_tsan), and backport them expecting v8.0 to run them.

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xgen-internal-githook commented on Fri, 3 Jan 2025 22:38:29 +0000: Author: {'name': 'James H', 'email': '00jamesh@gmail.com', 'username': 'jameseh96'} Message: SERVER-93428: Skip incompatible_tsan config/concurrency tests under tsan (#25964) GitOrigin-RevId: 3951c70dab063684fd9559aa46164ca01a76dfd8 Branch: v8.0 https://github.com/mongodb/mongo/commit/417eb239a8dccb7bd02996fc0e9d010c11f26e5f

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