我有一个rails app(4.1.5)由postgres数据库(9.2.13)支持使用pg gem(0.17.1),unicorn服务器(1.1.0)和2个工作进程.
rails app使用sidekiq(2.17.7)运行作业
在某些时候,postgres db进入恢复模式.多个作业抛出以下错误:
PG::ConnectionBad:FATAL: the database system is in recovery mode
FATAL: the database system is in recovery mode
数据库恢复了,但作业继续引发以下两个错误:
PG::Error:invalid encoding name: utf8
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/postgresql_adapter.rb:908:in `set_client_encoding'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/postgresql_adapter.rb:908:in `configure_connection'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/postgresql_adapter.rb:603:in `reconnect!'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract_adapter.rb:313:in `verify!'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:453:in `block in checkout_and_verify'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:82:in `run_callbacks'
和
ActiveRecord::ConnectionTimeoutError:could not obtain a database connection within 5.000 seconds (waited 5.000 seconds)
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:190:in `block in wait_poll'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:181:in `loop'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:181:in `wait_poll'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:136:in `block in poll'
/home/ruby/.rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:146:in `synchronize'
/home/ruby/data42/shared/bundle/ruby/2.2.0/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:134:in `poll'
它看起来像rails通知连接未激活并尝试重置连接.在活动记录的postgresql_adapter.rb中,调用以下方法:
# Close then reopen the connection. …