Hello!

On Tue, May 24, 2022 at 08:04:16AM -0700, Dk Jack wrote:

> I am noticing this with our modules. Although, we do not do not message
> with any nginx reference counting etc.
> At most, we are sending 403-forbidden for some requests. Could you suggest
> some ways about debugging this?

Request reference counting automatically happens in various nginx
functions, such as ngx_http_read_client_request_body() and
ngx_http_finalize_request(). Incorrect reference counting
suggests that your module does something wrong: for example, calls
ngx_http_finalize_request() when it shouldn't. Or returns an
incorrect result from a handler, which causes
ngx_http_finalize_request() to be called when it shouldn't.

The most straightforward way to debug such problems is to enable
debug logging and check all reference counting step-by-step for a
request which results in the alert.

--
Maxim Dounin
http://mdounin.ru/
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