验证框架里面的——

# mongoid-2.4.12/lib/mongoid/validations.rb 
# Begin the associated validation.
#     
# @example Begin validation.
#   document.begin_validate
#   
# @since 2.1.9
def begin_validate
  Threaded.begin_validate(self)
end

# Exit the associated validation.
#
# @example Exit validation.
#   document.exit_validate
#
# @since 2.1.9
def exit_validate
  Threaded.exit_validate(self)
end

如果应用不是多线程/多进程方式进行并发（比如事件驱动），这段代码是否会有问题？