cover more potential exception states withn the REST service;

src/network/rest/http/ClientConnection.h

@@ -94,11 +94,21 @@ namespace network
 
                 /// <summary>Helper to enable the SO_LINGER socket option during shutdown.</summary>
                 void ensureNoLinger()
+                {
+                    try
                     {
                         // enable SO_LINGER timeout 0
                         asio::socket_base::linger linger(true, 0);
                         m_socket.set_option(linger);
                     }
+                    catch(const asio::system_error& e)
+                    {
+                        asio::error_code ec = e.code();
+                        if (ec) {
+                            ::LogError(LOG_REST, "%s, code = %u", ec.message().c_str(), ec.value());
+                        }
+                    }
+                }
 
                 /// <summary>Perform an synchronous write operation.</summary>
                 void send(HTTPPayload request)
@@ -158,10 +168,14 @@ namespace network
                         if (ec) {
                             ::LogError(LOG_REST, "%s, code = %u", ec.message().c_str(), ec.value());
 
+                            try
+                            {
                                 // initiate graceful connection closure
                                 asio::error_code ignored_ec;
                                 m_socket.shutdown(asio::ip::tcp::socket::shutdown_both, ignored_ec);
                             }
+                            catch(const std::exception& e) { ::LogError(LOG_REST, "%s", ec.message().c_str()); }
+                        }
                     }
                 }
 

src/network/rest/http/ServerConnection.h

@@ -168,10 +168,14 @@ namespace network
                         }
                         else {
                             if (!ec) {
+                                try
+                                {
                                     // initiate graceful connection closure
                                     asio::error_code ignored_ec;
                                     m_socket.shutdown(asio::ip::tcp::socket::shutdown_both, ignored_ec);
                                 }
+                                catch(const std::exception& e) { ::LogError(LOG_REST, "%s", ec.message().c_str()); }
+                            }
 
                             if (ec != asio::error::operation_aborted) {
                                 if (ec) {