Rails mysql reconnect code

gistfile1.txt

ActiveRecord::ConnectionAdapters::MysqlAdapter.module_eval do
  def execute_with_retry_once(sql, name = nil)
    retried = false
    begin
      execute_without_retry_once(sql, name)
    rescue ActiveRecord::StatementInvalid => exception
      ActiveRecord::Base.logger.info "#{exception}, retried? #{retried}"

      # Our database connection has gone away, reconnect and retry this method
      reconnect!
      unless retried
        retried = true
        retry
      end
    end
  end

  alias_method_chain :execute, :retry_once
end