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我有一個ruby sinatra應用程序，它有一個rake任務，它將使用活動記錄來檢查數據庫中的數據文件。我使用when gem來按計劃運行這個rake任務。這工作很好，一段時間後，幾天後它會失敗，看起來它無法寫入日誌文件。我有一個救援，將通過電子郵件發送我的錯誤和堆棧跟蹤，這就是我得到：Ruby Crontab Rake任務失敗，但只有當命令由crontab運行時
Broken pipe -
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:578:in `write'
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:578:in `warn'
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:578:in `rescue in write'
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:562:in `write'
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:382:in `add'
/usr/local/rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/logger.rb:456:in `error'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:428:in `rescue in log'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:425:in `log'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:286:in `execute'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/mysql2_adapter.rb:220:in `execute'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/mysql2_adapter.rb:224:in `exec_query'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/mysql2_adapter.rb:233:in `select'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb:24:in `select_all'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/query_cache.rb:63:in `select_all'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb:30:in `select_one'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/database_statements.rb:36:in `select_value'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/relation/finder_methods.rb:174:in `exists?'
/home/deployer/public/fulfillment_api/shared/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/querying.rb:3:in `exists?'
/home/deployer/public/fulfillment_api/releases/20131010141756/app/models/clients/test/order_file.rb:39:in `block in create_new_orders'
每當寶石看起來像這樣由創建的crontab中：
0 0,12 * * * /bin/bash -l -c 'cd /home/deployer/public/fulfillment_api/releases/20131010141756 && RACK_ENV=production bundle exec rake background_jobs:process_and_email['\''[email protected]'\''] --silent'
是什麼奇怪的是，當我將這個命令放到命令行中時，它運行良好。即使我將用戶切換到root並運行它，它仍然可以毫無問題地運行。我只在crontab運行時發生錯誤。
當「crontab」作業運行時，「PATH」的設置與剛剛登錄時不同。您需要確保在cron作業中設置所需的'PATH'項目。 – lurker
嗨@mbratch，感謝您的評論。我嘗試將PATH設置爲我登錄時的相同值，但仍得到相同的結果。 – khartnett
當你在命令行上運行它時，你是用'/ bin/bash ...'來做它嗎？ – lurker