[#1225] engine: Log the error when check object existence

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

internal/logs/logs.go

@@ -205,6 +205,7 @@ const (
 	EngineCouldNotReloadAShard                                           = "could not reload a shard"
 	EngineAddedNewShard                                                  = "added new shard"
 	EngineCouldNotPutObjectToShard                                       = "could not put object to shard"
+	EngineCouldNotCheckObjectExistence                                   = "could not check object existence when put object to shard"
 	EngineErrorDuringSearchingForObjectChildren                          = "error during searching for object children"
 	EngineCouldNotInhumeObjectInShard                                    = "could not inhume object in shard"
 	EngineStartingRemovalOfLocallyredundantCopies                        = "starting removal of locally-redundant copies"

pkg/local_object_storage/engine/put.go

@@ -149,6 +149,11 @@ func (e *StorageEngine) putToShard(ctx context.Context, sh hashedShard, pool uti
 				// object is already found but
 				// expired => do nothing with it
 				res.status = putToShardExists
+			} else {
+				e.log.Warn(logs.EngineCouldNotCheckObjectExistence,
+					zap.Stringer("shard_id", sh.ID()),
+					zap.String("error", err.Error()),
+					zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
 			}
 
 			return // this is not ErrAlreadyRemoved error so we can go to the next shard