Fix spec

app/workers/archive_trace_worker.rb

@@ -5,8 +5,8 @@ class ArchiveTraceWorker
   include PipelineBackgroundQueue
 
   def perform(job_id)
-    Ci::Build.find_by(id: job_id).try do |job|
-      job.trace.archive! unless job.job_artifacts_trace
+    Ci::Build.without_archived_trace.find_by(id: job_id).try do |job|
+      job.trace.archive!
     end
   end
 end

app/workers/ci/archive_traces_cron_worker.rb

@@ -11,8 +11,10 @@ module Ci
       # More details in https://gitlab.com/gitlab-org/gitlab-ce/issues/36791
       Ci::Build.finished.with_live_trace.find_each(batch_size: 100) do |build|
         begin
-          build.trace.archive! unless build.job_artifacts_trace
+          build.trace.archive!
         rescue => e
+          next if e.message.include?('Already archived')
+
           failed_archive_counter.increment
           Rails.logger.error "Failed to archive stale live trace. id: #{build.id} message: #{e.message}"
         end

lib/gitlab/background_migration/archive_legacy_traces.rb

@@ -13,7 +13,7 @@ module Gitlab
         ::Ci::Build.finished.without_archived_trace
           .where(id: start_id..stop_id).find_each do |build|
             begin
-              build.trace.archive! unless build.job_artifacts_trace
+              build.trace.archive!
             rescue => e
               Rails.logger.error "Failed to archive live trace. id: #{build.id} message: #{e.message}"
             end

spec/workers/ci/archive_traces_cron_worker_spec.rb

@@ -25,24 +25,36 @@ describe Ci::ArchiveTracesCronWorker do
     end
   end
 
-  context 'when a job was succeeded' do
+  context 'when a job succeeded' do
     let!(:build) { create(:ci_build, :success, :trace_live) }
 
     it_behaves_like 'archives trace'
 
-    context 'when archive raised an exception' do
+    context 'when a trace had already been archived' do
       let!(:build) { create(:ci_build, :success, :trace_artifact, :trace_live) }
       let!(:build2) { create(:ci_build, :success, :trace_live) }
 
-      it 'archives valid targets' do
-        expect(Rails.logger).to receive(:error).with("Failed to archive stale live trace. id: #{build.id} message: Already archived")
-
+      it 'continues to archive live traces' do
         subject
 
         build2.reload
         expect(build2.job_artifacts_trace).to be_exist
       end
     end
+
+    context 'when an unexpected exception happened during archiving' do
+      let!(:build) { create(:ci_build, :success, :trace_live) }
+
+      before do
+        allow_any_instance_of(Gitlab::Ci::Trace).to receive(:archive!).and_raise('Unexpected error')
+      end
+
+      it 'puts a log' do
+        expect(Rails.logger).to receive(:error).with("Failed to archive stale live trace. id: #{build.id} message: Unexpected error")
+
+        subject
+      end
+    end
   end
 
   context 'when a job was cancelled' do