Serialize json.extra.raw_response to avoid field explosion in logs

lib/gitlab/bitbucket_import/importer.rb

@@ -43,7 +43,7 @@ module Gitlab
 
       def store_pull_request_error(pull_request, ex)
         backtrace = Gitlab::BacktraceCleaner.clean_backtrace(ex.backtrace)
-        error = { type: :pull_request, iid: pull_request.iid, errors: ex.message, trace: backtrace, raw_response: pull_request.raw }
+        error = { type: :pull_request, iid: pull_request.iid, errors: ex.message, trace: backtrace, raw_response: pull_request.raw&.to_json }
 
         Gitlab::ErrorTracking.log_exception(ex, error)
 

spec/lib/gitlab/bitbucket_import/importer_spec.rb

@@ -190,11 +190,14 @@ describe Gitlab::BitbucketImport::Importer do
 
     context 'when importing a pull request throws an exception' do
       before do
-        allow(pull_request).to receive(:raw).and_return('hello world')
+        allow(pull_request).to receive(:raw).and_return({ error: "broken" })
         allow(subject.client).to receive(:pull_request_comments).and_raise(Gitlab::HTTP::Error)
       end
 
       it 'logs an error without the backtrace' do
+        expect(Gitlab::ErrorTracking).to receive(:log_exception)
+          .with(instance_of(Gitlab::HTTP::Error), hash_including(raw_response: '{"error":"broken"}'))
+
         subject.execute
 
         expect(subject.errors.count).to eq(1)