in ngx_http_upstream_resolve_handler, posted requests are not handled, so if a run time dns resolving is failed in a subrequest, (for example, the resolver can not be reached, or the domain does not exist) the main request will know nothing about this, until something else attached to this connection happens, like connection broken or a write timeout
a patch is attached and hope it helps
simple configuration that can reproduce the problem (with addition module
enabled):
addition_types *;
resolver your_resolver_here;
location /test {
set $ihost xxx; # xxx here causes a failed
run-time dns resolving
proxy_pass http://$ihost;
}
location /zzz {
add_after_body /test;
return 200 "test";
}
curl -v http://localhost/zzz
posted_requests.patch
Description: Binary data
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