anchor.diff:                                      RegionInfoBuilder.FIRST_META_REGIONINFO, j);
               //If a metaLocation is null, All of its info would be empty here to be displayed.
               RegionStateNode rsn = master.getAssignmentManager().getRegionStates()
  -              .getRegionStateNode(RegionInfoBuilder.FIRST_META_REGIONINFO);
  +              .getRegionStateNode(meta);
               ServerName metaLocation = rsn != null ? rsn.getRegionLocation() : null;
               for (int i = 0; i < 1; i++) {
                 //If metaLocation is null, default value below would be displayed in UI.
  
positive.code:                                     RegionInfoBuilder.FIRST_META_REGIONINFO, j);
              //If a metaLocation is null, All of its info would be empty here to be displayed.
              RegionStateNode rsn = master.getAssignmentManager().getRegionStates()
                .getRegionStateNode(RegionInfoBuilder.FIRST_META_REGIONINFO);
              ServerName metaLocation = rsn != null ? rsn.getRegionLocation() : null;
              for (int i = 0; i < 1; i++) {
                //If metaLocation is null, default value below would be displayed in UI.
  
negative.code:                                      RegionInfoBuilder.FIRST_META_REGIONINFO, j);
               //If a metaLocation is null, All of its info would be empty here to be displayed.
               RegionStateNode rsn = master.getAssignmentManager().getRegionStates()
                .getRegionStateNode(meta);
               ServerName metaLocation = rsn != null ? rsn.getRegionLocation() : null;
               for (int i = 0; i < 1; i++) {
                 //If metaLocation is null, default value below would be displayed in UI.
  