align bucket boundary to interval in rolling window (#345)

2021-01-04 11:17:59 +08:00
parent efa43483b2
commit 0786862a35
2 changed files with 8 additions and 1 deletions
--- a/core/collection/rollingwindow.go
+++ b/core/collection/rollingwindow.go
@@ -96,7 +96,9 @@ func (rw *RollingWindow) updateOffset() {
 	}

 	rw.offset = (offset + span) % rw.size
-	rw.lastTime = rw.lastTime + rw.interval*time.Duration(span)
+	now := timex.Now()
+	// align to interval time boundary
+	rw.lastTime = now - (now-rw.lastTime)%rw.interval
 }

 type Bucket struct {