Update CHANGELOG.md

Signed-off-by: Nikolay <nik@victoriametrics.com>

app/vmselect/promql/eval.go

@@ -1093,6 +1093,7 @@ func evalRollupFuncWithSubquery(qt *querytracer.Tracer, ec *EvalConfig, funcName
 	var samplesScannedTotal atomic.Uint64
 	keepMetricNames := getKeepMetricNames(expr)
 	tsw := getTimeseriesByWorkerID()
+	defer putTimeseriesByWorkerID(tsw)
 	seriesByWorkerID := tsw.byWorkerID
 	doParallel(tssSQ, func(tsSQ *timeseries, values []float64, timestamps []int64, workerID uint) ([]float64, []int64) {
 		values, timestamps = removeNanValues(values[:0], timestamps[:0], tsSQ.Values, tsSQ.Timestamps)
@@ -1115,7 +1116,6 @@ func evalRollupFuncWithSubquery(qt *querytracer.Tracer, ec *EvalConfig, funcName
 	for i := range seriesByWorkerID {
 		tss = append(tss, seriesByWorkerID[i].tss...)
 	}
-	putTimeseriesByWorkerID(tsw)
 
 	rowsScannedPerQuery.Update(float64(samplesScannedTotal.Load()))
 	qt.Printf("rollup %s() over %d series returned by subquery: series=%d, samplesScanned=%d", funcName, len(tssSQ), len(tss), samplesScannedTotal.Load())
@@ -2021,6 +2021,7 @@ func evalRollupNoIncrementalAggregate(qt *querytracer.Tracer, funcName string, k
 
 	var samplesScannedTotal atomic.Uint64
 	tsw := getTimeseriesByWorkerID()
+	defer putTimeseriesByWorkerID(tsw)
 	seriesByWorkerID := tsw.byWorkerID
 	seriesLen := rss.Len()
 	err := rss.RunParallel(qt, func(rs *netstorage.Result, workerID uint) error {
@@ -2047,7 +2048,6 @@ func evalRollupNoIncrementalAggregate(qt *querytracer.Tracer, funcName string, k
 	for i := range seriesByWorkerID {
 		tss = append(tss, seriesByWorkerID[i].tss...)
 	}
-	putTimeseriesByWorkerID(tsw)
 
 	rowsScannedPerQuery.Update(float64(samplesScannedTotal.Load()))
 	qt.Printf("samplesScanned=%d", samplesScannedTotal.Load())

docs/victoriametrics/changelog/CHANGELOG.md

@@ -26,6 +26,8 @@ See also [LTS releases](https://docs.victoriametrics.com/victoriametrics/lts-rel
 
 ## tip
 
+* BUGFIX: [vmsingle](https://docs.victoriametrics.com/victoriametrics/single-server-victoriametrics/) and `vmselect` in [VictoriaMetrics cluster](https://docs.victoriametrics.com/victoriametrics/cluster-victoriametrics/): properly re-use memory if query aggregation returns error. See [#11426](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/11426).
+
 ## [v1.150.0](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.150.0)
 
 Released at 2026-08-17