Some problems are caused by bugs in Passenger. . You need to relax permissions to that the Nginx worker process can access your Read Sandboxing apps with Unix user accounts to learn why Passenger may run your. worker process caused % CPU usage on one core on win Reported by: qpqtaxfzy.boxip.net accounts /o8/id?id=AItOawkdxdxrVGkAjcbQ50oSB_I5- ngx_terminate and ngx_quit are still 0; this thread will cause one core % usage;. Administrator Note: An error message detailing the cause of this specific request failure can be found in the This problem occurs because the process model user account (by default, ASPNET) does not have the NET worker process.