In memory subrequest hang if backend return 500

[Abioy Sun]

Hi All,

In the file ngx_http_upstream.c I found some code like this:

1618     if (u->headers_in.status_n > NGX_HTTP_SPECIAL_RESPONSE) {
1619
1620         if (r->subrequest_in_memory) {
1621             u->buffer.last = u->buffer.pos;
1622         }

that means, if the status backend return if greater than 300, the first
part of the body would be abandoned.  Will this cause the issue that the
main request won't be woken again and keep sleeping until timeout? Or did I
misunderstand anything?

Yours,
Abioy
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