Add user to ApplicationContext

app/services/merge_requests/base_service.rb

@@ -181,7 +181,9 @@ module MergeRequests
       }
 
       if exception
-        Gitlab::ErrorTracking.track_exception(exception, data)
+        Gitlab::ApplicationContext.with_context(user: current_user) do
+          Gitlab::ErrorTracking.track_exception(exception, data)
+        end
 
         data[:"exception.message"] = exception.message
       end

lib/api/helpers.rb

@@ -467,7 +467,9 @@ module API
     def handle_api_exception(exception)
       if report_exception?(exception)
         define_params_for_grape_middleware
-        Gitlab::ErrorTracking.track_exception(exception)
+        Gitlab::ApplicationContext.with_context(user: current_user) do
+          Gitlab::ErrorTracking.track_exception(exception)
+        end
       end
 
       # This is used with GrapeLogging::Loggers::ExceptionLogger

lib/gitlab/error_tracking/processor/context_payload_processor.rb

 # frozen_string_literal: true
 
-require 'set'
-
 module Gitlab
   module ErrorTracking
     module Processor