From d03356b85ecf896dcb570db843167ed85d775032 Mon Sep 17 00:00:00 2001
From: crazyxy <yxyan@google.com>
Date: Wed, 4 Sep 2019 17:29:02 -0700
Subject: [PATCH] add more diagnostic logs

Signed-off-by: crazyxy <yxyan@google.com>
---
 source/server/connection_handler_impl.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/server/connection_handler_impl.cc b/source/server/connection_handler_impl.cc
index 4362ddb50d0f..29235715b51b 100644
--- a/source/server/connection_handler_impl.cc
+++ b/source/server/connection_handler_impl.cc
@@ -158,7 +158,11 @@ ConnectionHandlerImpl::findActiveListenerByAddress(const Network::Address::Insta
 void ConnectionHandlerImpl::ActiveSocket::onTimeout() {
   listener_.stats_.downstream_pre_cx_timeout_.inc();
   ASSERT(inserted());
+  ENVOY_LOG_TO_LOGGER(listener_.parent_.logger_, debug, "listener filter times out after {} ms",
+                      listener_.listener_filters_timeout_.count());
+
   if (listener_.continue_on_listener_filters_timeout_) {
+    ENVOY_LOG_TO_LOGGER(listener_.parent_.logger_, debug, "fallback to default listener filter");
     newConnection();
   }
   unlink();