Question

某些用户在登录时以及尝试浏览某些页面时或者服务器闲置一段时间或访问我的控制器页面时会遇到500错误。

发生500个错误的生产日志如下：

Completed 500 Internal Server Error in 1ms (ActiveRecord: 0.3ms)

ActiveRecord::StatementInvalid (Mysql2::Error: MySQL server has gone away: SELECT 
MAX(`settings`.`updated_on`) FROM `settings`):
  app/models/setting.rb:231:in `check_cache'
  app/controllers/application_controller.rb:90:in `user_setup'

Started GET "/" for 127.0.0.1 at 2019-12-29 08:52:50 +0000
Processing by MyController#page as HTML
Completed 500 Internal Server Error in 1ms (ActiveRecord: 0.2ms)

ActiveRecord::StatementInvalid (Mysql2::Error: MySQL server has gone away: SELECT MAX(`settings`.`updated_on`) FROM `settings`):
  app/models/setting.rb:231:in `check_cache'
  app/controllers/application_controller.rb:90:in `user_setup'

Started GET "/" for 127.0.0.1 at 2019-12-29 08:52:56 +0000

Mysql2::Error (Can't connect to MySQL server on 'rds-prod-db-xxxxx.c3uzu7me4rud.us-east-1.rds.amazonaws.com' (111)):

Completed 500 Internal Server Error in 134ms (ActiveRecord: 69.2ms)

第二个错误：

ActiveRecord::StatementInvalid (Mysql2::Error: Deadlock found when trying to get lock; try restarting transaction: UPDATE `issues` SET `issues`.`done_ratio` = 90, `issues`.`updated_on` = '2020-01-20 08:22:21', `issues`.`lock_version` = 49 WHERE `issues`.`id` = 328453 AND `issues`.`lock_version` = 48):
  app/models/issue.rb:210:in `create_or_update'
  app/models/issue.rb:1716:in `recalculate_attributes_for'
  app/models/issue.rb:1666:in `update_parent_attributes'
  app/models/issue.rb:210:in `create_or_update'
  app/controllers/issues_controller.rb:558:in `block in save_issue_with_child_records'
  app/controllers/issues_controller.rb:546:in `save_issue_with_child_records'
  app/controllers/issues_controller.rb:168:in `update'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'

第三错误：

Completed 500 Internal Server Error in 1ms (ActiveRecord: 0.2ms)

ActiveRecord::StatementInvalid (Mysql2::Error: MySQL server has gone away: UPDATE `tokens` SET `tokens`.`updated_on` = '2020-02-02 09:07:22' WHERE `tokens`.`user_id` = 289 AND `tokens`.`value` = 'a30e44e2ac37c8ba31eb383a409509c0d5fbb8be' AND `tokens`.`action` = 'session' AND (created_on > '2020-02-01 09:07:22') AND (updated_on > '2020-02-01 09:07:22')):
  app/models/user.rb:445:in `verify_session_token'
  app/controllers/application_controller.rb:77:in `session_expired?'
  app/controllers/application_controller.rb:67:in `session_expiration'

Started GET "/" for 127.0.0.1 at 2020-02-02 09:07:25 +0000

我在Redmine论坛的一个较早的主题中遇到了几乎相同的问题，但尚未找到解决方案。信息：环境：

  Redmine version                3.4.4.stable
  Ruby version                   2.2.2-p95 (2015-04-13) [x86_64-linux]
  Rails version                  4.2.8
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.7.14
  Git                            1.8.3.1
  Filesystem                     
Redmine plugins:
  redmine_query_share            2.1.0
  redmine_agile                  1.4.5
  sidebar_hide                   0.0.7

Ruby Server：Puma Puma_worker_killer配置：

PumaWorkerKiller.config do |config|
    config.ram           = 4096 # mb
    config.frequency     = 60   # seconds
    config.percent_usage = 0.90
    config.rolling_restart_frequency = 10 * 3600 # 12 hours in seconds, or 12.hours if using Rails
    config.reaper_status_logs = true # setting this to false will not log lines like:
    # PumaWorkerKiller: Consuming 54.34765625 mb with master and 2 workers.

    config.pre_term = -> (worker) { puts "Worker #{worker.inspect} being killed" 
  Thread: 4-16
  }
  end

我对使用红宝石和Redmine非常陌生。任何帮助，将不胜感激。谢谢。

Answer 1

我过去曾遇到过此类问题，并通过更新MySQL配置（在my.cnf中）找到了解决方案。在配置文件中添加一行，如下所示：

[mysqld] 
max_allowed_packet=100M

通常，您不需要重新启动MySQL服务器。

Redmine中的间歇性500内部服务器错误

1 个答案: