Fix space status flags logging for multiput (ydb-platform#8304)

Author: robdrynkin

ydb/core/blobstorage/vdisk/common/vdisk_response.cpp

@@ -28,11 +28,12 @@ void SendVDiskResponse(const TActorContext &ctx, const TActorId &recipient, IEve
             }
             case TEvBlobStorage::TEvVMultiPutResult::EventType: {
                 TEvBlobStorage::TEvVMultiPutResult *event = static_cast<TEvBlobStorage::TEvVMultiPutResult *>(ev);
-                for (ui64 i = 0; i < event->Record.ItemsSize(); ++i) {
-                    const auto& item = event->Record.GetItems(i);
-                    LogOOSStatus(item.GetStatusFlags(), LogoBlobIDFromLogoBlobID(item.GetBlobID()), vCtx->VDiskLogPrefix, vCtx->CurrentOOSStatusFlag);
-                    UpdateMonOOSStatus(item.GetStatusFlags(), vCtx->OOSMonGroup);
+                if (event->Record.ItemsSize() > 0) {
+                    const auto& item = event->Record.GetItems(0);
+                    LogOOSStatus(event->Record.GetStatusFlags(), LogoBlobIDFromLogoBlobID(item.GetBlobID()), vCtx->VDiskLogPrefix, vCtx->CurrentOOSStatusFlag);
+                    UpdateMonOOSStatus(event->Record.GetStatusFlags(), vCtx->OOSMonGroup);
                 }
+                break;
             }
         }
     }
@@ -83,7 +84,8 @@ void LogOOSStatus(ui32 flags, const TLogoBlobID& blobId, const TString& vDiskLog
 
     LOG_NOTICE_S(*TlsActivationContext, NKikimrServices::BS_VDISK_CHUNKS,
         vDiskLogPrefix << "Disk space status changed to " <<
-        TPDiskSpaceColor_Name(StatusFlagToSpaceColor(flags)) << " on blob " << blobId.ToString());
+        TPDiskSpaceColor_Name(StatusFlagToSpaceColor(flags)) << " on blob " << blobId.ToString() << "; " <<
+        "oldFlags: " << prevFlags << ", newFlags: " << flags);
 }
 
 void UpdateMonOOSStatus(ui32 flags, const std::shared_ptr<NMonGroup::TOutOfSpaceGroup>& monGroup) {