[#99] Fix possibility of panic during SIGHUP

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

CHANGELOG.md

@@ -5,6 +5,7 @@ This document outlines major changes between releases.
 ## [Unreleased]
 
 ### Fixed
+- Fix possibility of panic during SIGHUP (#99)
 
 ### Added
 - Support client side object cut (#70)

internal/logs/logs.go

@@ -20,6 +20,7 @@ const (
 	ServiceHasntStartedSinceItsDisabled                                   = "service hasn't started since it's disabled"                                             // Info in ../../metrics/service.go
 	ShuttingDownService                                                   = "shutting down service"                                                                  // Info in ../../metrics/service.go
 	CantShutDownService                                                   = "can't shut down service"                                                                // Panic in ../../metrics/service.go
+	CantGracefullyShutDownService                                         = "can't gracefully shut down service, force stop"                                         // Error in ../../metrics/service.go
 	IgnorePartEmptyFormName                                               = "ignore part, empty form name"                                                           // Debug in ../../uploader/upload.go
 	IgnorePartEmptyFilename                                               = "ignore part, empty filename"                                                            // Debug in ../../uploader/upload.go
 	CloseTemporaryMultipartFormFile                                       = "close temporary multipart/form file"                                                    // Debug in ../../uploader/upload.go

metrics/service.go

@@ -40,6 +40,9 @@ func (ms *Service) ShutDown(ctx context.Context) {
 	ms.log.Info(logs.ShuttingDownService, zap.String("endpoint", ms.Addr))
 	err := ms.Shutdown(ctx)
 	if err != nil {
-		ms.log.Panic(logs.CantShutDownService)
+		ms.log.Error(logs.CantGracefullyShutDownService, zap.Error(err))
+		if err = ms.Close(); err != nil {
+			ms.log.Panic(logs.CantShutDownService, zap.Error(err))
+		}
 	}
 }