Flaky test: "Gitlab::BackgroundMigration::MigrateBuildStage recovers from unique constraint violation only twice" / spec/lib/gitlab/background_migration/migrate_build_stage_spec.rb:58
Job #198076696 failed for gitlab-ce@9699f106d36554665c63f9711ff5daeb56acf6c4:
1) Gitlab::BackgroundMigration::MigrateBuildStage recovers from unique constraint violation only twice
Failure/Error:
expect(described_class::Migratable::Stage)
.to receive(:find_by).exactly(3).times
(Gitlab::BackgroundMigration::MigrateBuildStage::Migratable::Stage(id: integer, project_id: integer, pipeline_id: integer, created_at: datetime, updated_at: datetime, name: string, status: integer, lock_version: integer) (class)).find_by(*(any args))
expected: 3 times with any arguments
received: 4 times with any arguments
# ./spec/lib/gitlab/background_migration/migrate_build_stage_spec.rb:58:in `block (2 levels) in <top (required)>'