Improve batched background migration logs

- log job_class_name, job_arguments, exception_class,
exception_message, and batched_migration_id during
batched background migration transitions

Changelog: added

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/357558

lib/gitlab/database/background_migration/batched_job.rb

@@ -62,7 +62,13 @@ module Gitlab
 
             job.split_and_retry! if job.can_split?(exception)
           rescue SplitAndRetryError => error
-            Gitlab::AppLogger.error(message: error.message, batched_job_id: job.id)
+            Gitlab::AppLogger.error(
+              message: error.message,
+              batched_job_id: job.id,
+              batched_migration_id: job.batched_migration.id,
+              job_class_name: job.migration_job_class_name,
+              job_arguments: job.migration_job_arguments
+            )
           end
 
           after_transition do |job, transition|
@@ -72,13 +78,23 @@ module Gitlab
 
             job.batched_job_transition_logs.create(previous_status: transition.from, next_status: transition.to, exception_class: exception&.class, exception_message: exception&.message)
 
-            Gitlab::ErrorTracking.track_exception(exception, batched_job_id: job.id) if exception
-
-            Gitlab::AppLogger.info(message: 'BatchedJob transition', batched_job_id: job.id, previous_state: transition.from_name, new_state: transition.to_name)
+            Gitlab::ErrorTracking.track_exception(exception, batched_job_id: job.id, job_class_name: job.migration_job_class_name, job_arguments: job.migration_job_arguments) if exception
+
+            Gitlab::AppLogger.info(
+              message: 'BatchedJob transition',
+              batched_job_id: job.id,
+              previous_state: transition.from_name,
+              new_state: transition.to_name,
+              batched_migration_id: job.batched_migration.id,
+              job_class_name: job.migration_job_class_name,
+              job_arguments: job.migration_job_arguments,
+              exception_class: exception&.class,
+              exception_message: exception&.message
+            )
           end
         end
 
-        delegate :job_class, :table_name, :column_name, :job_arguments,
+        delegate :job_class, :table_name, :column_name, :job_arguments, :job_class_name,
           to: :batched_migration, prefix: :migration
 
         attribute :pause_ms, :integer, default: 100

spec/lib/gitlab/database/background_migration/batched_job_spec.rb

@@ -21,7 +21,19 @@ RSpec.describe Gitlab::Database::BackgroundMigration::BatchedJob, type: :model d
 
     context 'when a job is running' do
       it 'logs the transition' do
-        expect(Gitlab::AppLogger).to receive(:info).with( { batched_job_id: job.id, message: 'BatchedJob transition', new_state: :running, previous_state: :failed } )
+        expect(Gitlab::AppLogger).to receive(:info).with(
+          {
+            batched_job_id: job.id,
+            batched_migration_id: job.batched_background_migration_id,
+            exception_class: nil,
+            exception_message: nil,
+            job_arguments: job.batched_migration.job_arguments,
+            job_class_name: job.batched_migration.job_class_name,
+            message: 'BatchedJob transition',
+            new_state: :running,
+            previous_state: :failed
+          }
+        )
 
         expect { job.run! }.to change(job, :started_at)
       end
@@ -31,7 +43,19 @@ RSpec.describe Gitlab::Database::BackgroundMigration::BatchedJob, type: :model d
       let(:job) { create(:batched_background_migration_job, :running) }
 
       it 'logs the transition' do
-        expect(Gitlab::AppLogger).to receive(:info).with( { batched_job_id: job.id, message: 'BatchedJob transition', new_state: :succeeded, previous_state: :running } )
+        expect(Gitlab::AppLogger).to receive(:info).with(
+          {
+            batched_job_id: job.id,
+            batched_migration_id: job.batched_background_migration_id,
+            exception_class: nil,
+            exception_message: nil,
+            job_arguments: job.batched_migration.job_arguments,
+            job_class_name: job.batched_migration.job_class_name,
+            message: 'BatchedJob transition',
+            new_state: :succeeded,
+            previous_state: :running
+          }
+        )
 
         job.succeed!
       end
@@ -89,7 +113,15 @@ RSpec.describe Gitlab::Database::BackgroundMigration::BatchedJob, type: :model d
         end
 
         it 'logs the error' do
-          expect(Gitlab::AppLogger).to receive(:error).with( { message: error_message, batched_job_id: job.id } )
+          expect(Gitlab::AppLogger).to receive(:error).with(
+            {
+              batched_job_id: job.id,
+              batched_migration_id: job.batched_background_migration_id,
+              job_arguments: job.batched_migration.job_arguments,
+              job_class_name: job.batched_migration.job_class_name,
+              message: error_message
+            }
+          )
 
           job.failure!(error: exception)
         end
@@ -100,13 +132,32 @@ RSpec.describe Gitlab::Database::BackgroundMigration::BatchedJob, type: :model d
       let(:job) { create(:batched_background_migration_job, :running) }
 
       it 'logs the transition' do
-        expect(Gitlab::AppLogger).to receive(:info).with( { batched_job_id: job.id, message: 'BatchedJob transition', new_state: :failed, previous_state: :running } )
+        expect(Gitlab::AppLogger).to receive(:info).with(
+          {
+            batched_job_id: job.id,
+            batched_migration_id: job.batched_background_migration_id,
+            exception_class: RuntimeError,
+            exception_message: 'error',
+            job_arguments: job.batched_migration.job_arguments,
+            job_class_name: job.batched_migration.job_class_name,
+            message: 'BatchedJob transition',
+            new_state: :failed,
+            previous_state: :running
+          }
+        )
 
-        job.failure!
+        job.failure!(error: RuntimeError.new('error'))
       end
 
       it 'tracks the exception' do
-        expect(Gitlab::ErrorTracking).to receive(:track_exception).with(RuntimeError, { batched_job_id: job.id } )
+        expect(Gitlab::ErrorTracking).to receive(:track_exception).with(
+          RuntimeError,
+          {
+            batched_job_id: job.id,
+            job_arguments: job.batched_migration.job_arguments,
+            job_class_name: job.batched_migration.job_class_name
+          }
+        )
 
         job.failure!(error: RuntimeError.new)
       end
@@ -194,6 +245,12 @@ RSpec.describe Gitlab::Database::BackgroundMigration::BatchedJob, type: :model d
         expect(batched_job.migration_job_arguments).to eq(batched_migration.job_arguments)
       end
     end
+
+    describe '#migration_job_class_name' do
+      it 'returns the migration job_class_name' do
+        expect(batched_job.migration_job_class_name).to eq(batched_migration.job_class_name)
+      end
+    end
   end
 
   describe '#can_split?' do