From 7b4de401d25af49cb7b567877272994c3b6370f5 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sat, 19 Sep 2020 23:22:14 +0900
Subject: [PATCH] nghttpx: Check worker wide blocker before creating new
 downstream connection

---
 src/shrpx_client_handler.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/shrpx_client_handler.cc b/src/shrpx_client_handler.cc
index c4b0be59..3668c17a 100644
--- a/src/shrpx_client_handler.cc
+++ b/src/shrpx_client_handler.cc
@@ -985,6 +985,14 @@ ClientHandler::get_downstream_connection(int &err, Downstream *downstream) {
       return dconn;
     }
 
+    if (worker_->get_connect_blocker()->blocked()) {
+      if (LOG_ENABLED(INFO)) {
+        DCLOG(INFO, this)
+            << "Worker wide backend connection was blocked temporarily";
+      }
+      return nullptr;
+    }
+
     if (LOG_ENABLED(INFO)) {
       CLOG(INFO, this) << "Downstream connection pool is empty."
                        << " Create new one";