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fix: anomaly with below operator negates the target (#9288)

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This commit is contained in:
Srikanth Chekuri
2025-10-08 12:11:31 +05:30
committed by GitHub
parent a22ef64bb0
commit 9cebd49a2c
4 changed files with 367 additions and 11 deletions
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12
ee/anomaly/seasonal.go
View File

@@ -232,7 +232,7 @@ func (p *BaseSeasonalProvider) getPredictedSeries(
// moving avg of the previous period series + z score threshold * std dev of the series
// moving avg of the previous period series - z score threshold * std dev of the series
func (p *BaseSeasonalProvider) getBounds(
series, predictedSeries *qbtypes.TimeSeries,
series, predictedSeries, weekSeries *qbtypes.TimeSeries,
zScoreThreshold float64,
) (*qbtypes.TimeSeries, *qbtypes.TimeSeries) {
upperBoundSeries := &qbtypes.TimeSeries{
@@ -246,8 +246,8 @@ func (p *BaseSeasonalProvider) getBounds(
}
for idx, curr := range series.Values {
upperBound := p.getMovingAvg(predictedSeries, movingAvgWindowSize, idx) + zScoreThreshold*p.getStdDev(series)
lowerBound := p.getMovingAvg(predictedSeries, movingAvgWindowSize, idx) - zScoreThreshold*p.getStdDev(series)
upperBound := p.getMovingAvg(predictedSeries, movingAvgWindowSize, idx) + zScoreThreshold*p.getStdDev(weekSeries)
lowerBound := p.getMovingAvg(predictedSeries, movingAvgWindowSize, idx) - zScoreThreshold*p.getStdDev(weekSeries)
upperBoundSeries.Values = append(upperBoundSeries.Values, &qbtypes.TimeSeriesValue{
Timestamp: curr.Timestamp,
Value: upperBound,
@@ -398,8 +398,6 @@ func (p *BaseSeasonalProvider) getAnomalies(ctx context.Context, orgID valuer.UU
aggOfInterest := result.Aggregations[0]
for _, series := range aggOfInterest.Series {
stdDev := p.getStdDev(series)
p.logger.InfoContext(ctx, "calculated standard deviation for series", "anomaly_std_dev", stdDev, "anomaly_labels", series.Labels)
pastPeriodSeries := p.getMatchingSeries(ctx, pastPeriodResult, series)
currentSeasonSeries := p.getMatchingSeries(ctx, currentSeasonResult, series)
@@ -407,6 +405,9 @@ func (p *BaseSeasonalProvider) getAnomalies(ctx context.Context, orgID valuer.UU
past2SeasonSeries := p.getMatchingSeries(ctx, past2SeasonResult, series)
past3SeasonSeries := p.getMatchingSeries(ctx, past3SeasonResult, series)
stdDev := p.getStdDev(currentSeasonSeries)
p.logger.InfoContext(ctx, "calculated standard deviation for series", "anomaly_std_dev", stdDev, "anomaly_labels", series.Labels)
prevSeriesAvg := p.getAvg(pastPeriodSeries)
currentSeasonSeriesAvg := p.getAvg(currentSeasonSeries)
pastSeasonSeriesAvg := p.getAvg(pastSeasonSeries)
@@ -435,6 +436,7 @@ func (p *BaseSeasonalProvider) getAnomalies(ctx context.Context, orgID valuer.UU
upperBoundSeries, lowerBoundSeries := p.getBounds(
series,
predictedSeries,
currentSeasonSeries,
zScoreThreshold,
)
aggOfInterest.UpperBoundSeries = append(aggOfInterest.UpperBoundSeries, upperBoundSeries)

5
ee/query-service/rules/anomaly.go
View File

@@ -78,11 +78,6 @@ func NewAnomalyRule(
opts = append(opts, baserules.WithLogger(logger))
if p.RuleCondition.CompareOp == ruletypes.ValueIsBelow {
target := -1 * *p.RuleCondition.Target
p.RuleCondition.Target = &target
}
baseRule, err := baserules.NewBaseRule(id, orgID, p, reader, opts...)
if err != nil {
return nil, err