From 7f4306f8ffa7c6d718822bd8380e327df7b31d85 Mon Sep 17 00:00:00 2001
From: Yhz <yinghao.zou@zilliz.com>
Date: Wed, 1 Apr 2020 22:12:08 +0800
Subject: [PATCH] add error log

---
 src/oatpp/network/server/SimpleTCPConnectionProvider.cpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/oatpp/network/server/SimpleTCPConnectionProvider.cpp b/src/oatpp/network/server/SimpleTCPConnectionProvider.cpp
index 076019b9..256d9070 100644
--- a/src/oatpp/network/server/SimpleTCPConnectionProvider.cpp
+++ b/src/oatpp/network/server/SimpleTCPConnectionProvider.cpp
@@ -172,26 +172,27 @@ oatpp::v_io_handle SimpleTCPConnectionProvider::instantiateServer(){
 
   ret = getaddrinfo(NULL, (const char *) portStr->getData(), &hints, &result);
   if (ret != 0) {
-    OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Error. Call to getaddrinfo() failed with result=%d", ret);
+    OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Error. Call to getaddrinfo() failed with result=%d: %s", ret, strerror(errno));
     throw std::runtime_error("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]: Error. Call to getaddrinfo() failed.");
   }
 
   serverHandle = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
   if (serverHandle < 0) {
-    OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Error. Couldn't open a socket");
+    OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Error. Couldn't open a socket: %s", strerror(errno));
     throw std::runtime_error("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]: Error. Couldn't open a socket");
   }
 
   ret = setsockopt(serverHandle, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
   if(ret < 0) {
-    OATPP_LOGD("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Warning. Failed to set %s for accepting socket", "SO_REUSEADDR");
+    OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Warning. Failed to set %s for accepting socket: %s", "SO_REUSEADDR", strerror(errno));
   }
 
   ret = bind(serverHandle, result->ai_addr, (int) result->ai_addrlen);
 
   if(ret != 0) {
     ::close(serverHandle);
-    throw std::runtime_error("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]: Error. Can't bind to address.");
+      OATPP_LOGE("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]", "Error. Failed to bind port %d: %s", m_port, strerror(errno));
+    throw std::runtime_error("[oatpp::network::server::SimpleTCPConnectionProvider::instantiateServer()]: Error. Can't bind to address: %s");
   }
 
   ret = listen(serverHandle, 10000);