Hello everyone, I am trying to create reports and the batch has 750 students. with i trying to create report for that batch i am getting this error in my production . How to solve this thing. kindly help me thanks in advance.
ActiveRecord::StatementInvalid (Mysql::Error: MySQL server has gone away: SELECT * FROM `exam_reports` WHERE (`exam_reports`.`student_id` = 130) LIMIT 1): app/models/exam_report.rb:67:in `generate_normal_report' app/models/exam_report.rb:15:in `each' app/models/exam_report.rb:15:in `generate_normal_report' app/models/exam_report.rb:7:in `each' app/models/exam_report.rb:7:in `generate_normal_report' app/controllers/exam_reports_controller.rb:77:in `normal_report_generation' passenger (3.0.9) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request' passenger (3.0.9) lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request' passenger (3.0.9) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop' passenger (3.0.9) lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler' passenger (3.0.9) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `send' passenger (3.0.9) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `handle_spawn_application' passenger (3.0.9) lib/phusion_passenger/utils.rb:479:in `safe_fork' passenger (3.0.9) lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:357:in `__send__' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:180:in `start' passenger (3.0.9) lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start' passenger (3.0.9) lib/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application' passenger (3.0.9) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add' passenger (3.0.9) lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application' passenger (3.0.9) lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize' passenger (3.0.9) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize' passenger (3.0.9) lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application' passenger (3.0.9) lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application' passenger (3.0.9) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:357:in `__send__' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' passenger (3.0.9) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' passenger (3.0.9) helper-scripts/passenger-spawn-server:99 -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/MBu4lNI5T7wJ. For more options, visit https://groups.google.com/groups/opt_out.
