diff --git a/dbms/src/Server/HTTPHandler.cpp b/dbms/src/Server/HTTPHandler.cpp
index 6b123e6bac8..ed5c930ceec 100644
--- a/dbms/src/Server/HTTPHandler.cpp
+++ b/dbms/src/Server/HTTPHandler.cpp
@@ -144,39 +144,39 @@ void HTTPHandler::handleRequest(Poco::Net::HTTPServerRequest & request, Poco::Ne
 	catch (DB::Exception & e)
 	{
 		response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
-		std::ostream & ostr = response.send();
 		std::stringstream s;
 		s << "Code: " << e.code()
 			<< ", e.displayText() = " << e.displayText() << ", e.what() = " << e.what();
-		ostr << s.str() << std::endl;
+		if (!response.sent())
+			response.send() << s.str() << std::endl;
 		LOG_ERROR(log, s.str());
 	}
 	catch (Poco::Exception & e)
 	{
 		response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
-		std::ostream & ostr = response.send();
 		std::stringstream s;
 		s << "Code: " << ErrorCodes::POCO_EXCEPTION << ", e.code() = " << e.code()
 			<< ", e.displayText() = " << e.displayText() << ", e.what() = " << e.what();
-		ostr << s.str() << std::endl;
+		if (!response.sent())
+			response.send() << s.str() << std::endl;
 		LOG_ERROR(log, s.str());
 	}
 	catch (std::exception & e)
 	{
 		response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
-		std::ostream & ostr = response.send();
 		std::stringstream s;
 		s << "Code: " << ErrorCodes::STD_EXCEPTION << ". " << e.what();
-		ostr << s.str() << std::endl;
+		if (!response.sent())
+			response.send() << s.str() << std::endl;
 		LOG_ERROR(log, s.str());
 	}
 	catch (...)
 	{
 		response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
-		std::ostream & ostr = response.send();
 		std::stringstream s;
 		s << "Code: " << ErrorCodes::UNKNOWN_EXCEPTION << ". Unknown exception.";
-		ostr << s.str() << std::endl;
+		if (!response.sent())
+			response.send() << s.str() << std::endl;
 		LOG_ERROR(log, s.str());
 	}
 }