Merge pull request #7153 from influxdata/js-7152-delete-series-causes-incorrect-measurement-statistic

Decrement number of measurements only once when deleting the last series from a measurement

CHANGELOG.md

@@ -14,6 +14,7 @@
 ### Bugfixes
 
 - [#1834](https://github.com/influxdata/influxdb/issues/1834): Drop time when used as a tag or field key.
+- [#7152](https://github.com/influxdata/influxdb/issues/7152): Decrement number of measurements only once when deleting the last series from a measurement.
 
 ## v1.0.0 [unreleased]
 

tsdb/meta.go

@@ -225,7 +225,6 @@ func (d *DatabaseIndex) UnassignShard(k string, shardID uint64) {
 				if !ss.measurement.HasSeries() {
 					d.mu.Lock()
 					d.dropMeasurement(ss.measurement.Name)
-					atomic.AddInt64(&d.stats.NumMeasurements, -1)
 					d.mu.Unlock()
 				}