segmentConfig init

index/scorch/scorch.go

@@ -122,6 +122,7 @@ func NewScorch(storeName string,
 		forceMergeRequestCh:  make(chan *mergerCtrl, 1),
 		segPlugin:            defaultSegmentPlugin,
 		copyScheduled:        map[string]int{},
+		segmentConfig:        make(map[string]interface{}),
 	}
 
 	forcedSegmentType, forcedSegmentVersion, err := configForceSegmentTypeVersion(config)
@@ -324,14 +325,6 @@ func (s *Scorch) openBolt() error {
 		s.rollbackRetentionFactor = r
 	}
 
-	if v, ok := s.config["cacheExpiryTime"]; ok {
-		// validate right at the beginning
-		if _, err = parseToTimeDuration(v); err != nil {
-			return fmt.Errorf("cacheExpiryTime parse err: %v", err)
-		}
-		s.segmentConfig["cacheExpiryTime"] = v
-	}
-
 	typ, ok := s.config["spatialPlugin"].(string)
 	if ok {
 		s.loadSpatialAnalyzerPlugin(typ)