From 63a2cfcf05eed6f5cc9749464bc857be9ad867ea Mon Sep 17 00:00:00 2001
From: Nikolay Krashnikov <1090219@mail.ru>
Date: Sun, 2 Aug 2020 00:45:29 +0300
Subject: [PATCH] doc: add HPE_UNEXPECTED_CONTENT_LENGTH error description

---
 doc/api/errors.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/api/errors.md b/doc/api/errors.md
index db3ea5af4be9b1..210e36ff5b932d 100644
--- a/doc/api/errors.md
+++ b/doc/api/errors.md
@@ -2271,6 +2271,17 @@ malconfigured clients, if more than 8KB of HTTP header data is received then
 HTTP parsing will abort without a request or response object being created, and
 an `Error` with this code will be emitted.
 
+<a id="HPE_UNEXPECTED_CONTENT_LENGTH"></a>
+### `HPE_UNEXPECTED_CONTENT_LENGTH`
+
+Server is sending both a `Content-Length` header and `Transfer-Encoding: chunked`.
+
+`Transfer-Encoding: chunked` allows the server to maintain an HTTP persistent
+connection for dynamically generated content.
+In this case, the `Content-Length` HTTP header cannot be used.
+
+Use `Content-Length` or `Transfer-Encoding: chunked`.
+
 <a id="MODULE_NOT_FOUND"></a>
 ### `MODULE_NOT_FOUND`
 <!-- YAML