How does nginx know about FastCGI's stderr?

任晓磊 julyclyde at
Mon Mar 15 15:56:11 MSK 2010

On Mon, Mar 15, 2010 at 5:49 PM, Maxim Dounin <mdounin at> wrote:
Thank you, Maxim. The document above tells me the detail. I thought
the protocol is a couple of stdio pipes before read this.

So, could you tell me why I see 502 when something in FastCGI's
stderr? Does texts from FastCGI's stderr lead to 502 ? But the specs
says they're just application-level errors.

Ren Xiaolei

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