Merge branch 'fp-lower-frequency-trace-update' into 'master'

Lower the frequency of which job trace updates occur [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!56743

config/feature_flags/development/ci_lower_frequency_trace_update.yml

+---
+name: ci_lower_frequency_trace_update
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56743
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/324768 
+milestone: '13.11'
+type: development
+group: group::continuous integration
+default_enabled: false

lib/gitlab/ci/trace.rb

@@ -11,7 +11,8 @@ module Gitlab
       LOCK_SLEEP = 0.001.seconds
       WATCH_FLAG_TTL = 10.seconds
 
-      UPDATE_FREQUENCY_DEFAULT = 30.seconds
+      LEGACY_UPDATE_FREQUENCY_DEFAULT = 30.seconds
+      UPDATE_FREQUENCY_DEFAULT = 60.seconds
       UPDATE_FREQUENCY_WHEN_BEING_WATCHED = 3.seconds
 
       ArchiveError = Class.new(StandardError)
@@ -114,7 +115,15 @@ module Gitlab
       end
 
       def update_interval
-        being_watched? ? UPDATE_FREQUENCY_WHEN_BEING_WATCHED : UPDATE_FREQUENCY_DEFAULT
+        if being_watched?
+          UPDATE_FREQUENCY_WHEN_BEING_WATCHED
+        else
+          if Feature.enabled?(:ci_lower_frequency_trace_update, job.project, default_enabled: :yaml)
+            UPDATE_FREQUENCY_DEFAULT
+          else
+            LEGACY_UPDATE_FREQUENCY_DEFAULT
+          end
+        end
       end
 
       def being_watched!

spec/lib/gitlab/ci/trace_spec.rb

@@ -63,8 +63,14 @@ RSpec.describe Gitlab::Ci::Trace, :clean_gitlab_redis_shared_state, factory_defa
 
   describe '#update_interval' do
     context 'it is not being watched' do
-      it 'returns 30 seconds' do
-        expect(trace.update_interval).to eq(30.seconds)
+      it { expect(trace.update_interval).to eq(60.seconds) }
+
+      context 'when feature flag ci_lower_frequency_trace_update is disabled' do
+        before do
+          stub_feature_flags(ci_lower_frequency_trace_update: false)
+        end
+
+        it { expect(trace.update_interval).to eq(30.seconds) }
       end
     end
 

spec/requests/api/ci/runner/jobs_trace_spec.rb

@@ -210,7 +210,19 @@ RSpec.describe API::Ci::Runner, :clean_gitlab_redis_shared_state do
         end
 
         context 'when build trace is not being watched' do
-          it 'returns X-GitLab-Trace-Update-Interval as 30' do
+          it 'returns the interval in X-GitLab-Trace-Update-Interval' do
+            patch_the_trace
+
+            expect(response).to have_gitlab_http_status(:accepted)
+            expect(response.header['X-GitLab-Trace-Update-Interval']).to eq('60')
+          end
+
+          context 'when ci_lower_frequency_trace_update feature flag is disabled' do
+            before do
+              stub_feature_flags(ci_lower_frequency_trace_update: false)
+            end
+
+            it 'returns the legacy interval in X-GitLab-Trace-Update-Interval' do
               patch_the_trace
 
               expect(response).to have_gitlab_http_status(:accepted)
@@ -218,6 +230,7 @@ RSpec.describe API::Ci::Runner, :clean_gitlab_redis_shared_state do
             end
           end
         end
+      end
 
       context 'when Runner makes a force-patch' do
         before do