WARN 无法确定响应体的内容长度。请设置响应的内容长度或设置 Response # chunked = true

我刚刚升级到 Rails 3.2.2，现在在 Rails s 中，页面加载，我在日志中看到了所有这些错误:

[2012-03-07 19:46:14] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true
[2012-03-07 19:46:14] WARN  Could not determine content-length of response body. Set content-length of the response or set Response#chunked = true

根据以前的 SO 线程，我尝试了以下方法:

/config/application.rb

config.assets.logger = false
config.assets.logger = nil

这些都不管用。对于如何禁用此日志记录此错误有什么想法吗？或者解决这个问题:)

谢谢