fix server: log deadline propagation exceptions with WARNING, not ERROR

36a4d824c7df9a9ea3c0ce755b32b34e3154b939

Author: Anton3

core/include/userver/server/handlers/http_handler_base.hpp

@@ -111,7 +111,9 @@ class HttpHandlerBase : public HandlerBase {
                               const std::exception& ex) const;
 
   /// Helper function to log an unknown exception
-  void LogUnknownException(const std::exception& ex) const;
+  void LogUnknownException(
+      const std::exception& ex,
+      std::optional<logging::Level> log_level_override = {}) const;
 
   /// Returns the default log level for the handler
   const std::optional<logging::Level>& GetLogLevel() const;

core/src/server/handlers/http_handler_base.cpp

@@ -444,12 +444,15 @@ void HttpHandlerBase::HandleUnknownException(const http::HttpRequest& request,
   }
 }
 
-void HttpHandlerBase::LogUnknownException(const std::exception& ex) const {
+void HttpHandlerBase::LogUnknownException(
+    const std::exception& ex, std::optional<logging::Level> log_level) const {
   if (engine::current_task::ShouldCancel()) {
-    LOG_WARNING() << "request task cancelled, exception in '" << HandlerName()
-                  << "' handler: " << ex;
+    LOG(log_level.value_or(logging::Level::kWarning))
+        << "request task cancelled, exception in '" << HandlerName()
+        << "' handler: " << ex;
   } else {
-    LOG_ERROR() << "exception in '" << HandlerName() << "' handler: " << ex;
+    LOG(log_level.value_or(logging::Level::kError))
+        << "exception in '" << HandlerName() << "' handler: " << ex;
   }
 }
 

core/src/server/middlewares/deadline_propagation.cpp

@@ -114,7 +114,7 @@ void DeadlinePropagation::HandleRequest(
     if (dp_scope.shared_dp_context.IsCancelledByDeadline()) {
       // No matter what the error is we're setting our response, log and swallow
       // the exception.
-      handler_.LogUnknownException(ex);
+      handler_.LogUnknownException(ex, logging::Level::kWarning);
       return;
     } else {
       // Let it fly further, not our problem.