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new 632f48b [TE] detection - zero divide fix (#4018)
632f48b is described below
commit 632f48bbc012892db92fe831f23042f934c079e5
Author: Jihao Zhang <jihzh...@linkedin.com>
AuthorDate: Tue Mar 26 10:58:46 2019 -0700
[TE] detection - zero divide fix (#4018)
Fix 0.0 divide
Refactor anomaly baseline & current value filling
---
.../detection/components/PercentageChangeRuleDetector.java | 8 ++++----
.../detection/wrapper/BaselineFillingMergeWrapper.java | 13 ++++++++-----
.../components/PercentageChangeRuleDetectorTest.java | 2 +-
3 files changed, 13 insertions(+), 10 deletions(-)
diff --git
a/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetector.java
b/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetector.java
index 59fe1aa..ec828c6 100644
---
a/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetector.java
+++
b/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetector.java
@@ -90,11 +90,11 @@ public class PercentageChangeRuleDetector implements
AnomalyDetector<PercentageC
// calculate percentage change
df.addSeries(COL_CHANGE, map((Series.DoubleFunction) values -> {
- if (values[1] == 0) {
- return values[0] == 0 ? 0.0 : (values[0] > 0 ?
Double.POSITIVE_INFINITY : Double.NEGATIVE_INFINITY);
+ if (Double.compare(values[1], 0.0) == 0) {
+ return Double.compare(values[0], 0.0) == 0 ? 0.0 : (values[0] > 0 ?
Double.POSITIVE_INFINITY : Double.NEGATIVE_INFINITY);
}
- return values[0] / values[1];
- }, df.getDoubles(COL_CURR), df.get(COL_BASE)).subtract(1));
+ return (values[0] - values[1]) / values[1];
+ }, df.getDoubles(COL_CURR), df.get(COL_BASE)));
// defaults
df.addSeries(COL_ANOMALY, BooleanSeries.fillValues(df.size(), false));
diff --git
a/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/wrapper/BaselineFillingMergeWrapper.java
b/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/wrapper/BaselineFillingMergeWrapper.java
index e07cf83..8355b5c 100644
---
a/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/wrapper/BaselineFillingMergeWrapper.java
+++
b/thirdeye/thirdeye-pinot/src/main/java/org/apache/pinot/thirdeye/detection/wrapper/BaselineFillingMergeWrapper.java
@@ -22,6 +22,7 @@ package org.apache.pinot.thirdeye.detection.wrapper;
import com.google.common.base.Preconditions;
import com.google.common.collect.Collections2;
import java.util.HashMap;
+import java.util.stream.Collectors;
import org.apache.pinot.thirdeye.dataframe.DoubleSeries;
import org.apache.pinot.thirdeye.dataframe.Series;
import org.apache.pinot.thirdeye.dataframe.util.MetricSlice;
@@ -124,7 +125,13 @@ public class BaselineFillingMergeWrapper extends
MergeWrapper {
@Override
protected List<MergedAnomalyResultDTO>
merge(Collection<MergedAnomalyResultDTO> anomalies) {
- return this.fillCurrentAndBaselineValue(super.merge(anomalies));
+ List<MergedAnomalyResultDTO> mergedAnomalies = super.merge(anomalies);
+
+ // skip current & baseline filling if the anomaly is not merged
+ this.fillCurrentAndBaselineValue(mergedAnomalies.stream()
+ .filter(mergedAnomaly -> !isExistingAnomaly(this.existingAnomalies,
mergedAnomaly)).collect(Collectors.toList()));
+
+ return mergedAnomalies;
}
@Override
@@ -157,10 +164,6 @@ public class BaselineFillingMergeWrapper extends
MergeWrapper {
*/
List<MergedAnomalyResultDTO>
fillCurrentAndBaselineValue(List<MergedAnomalyResultDTO> mergedAnomalies) {
for (MergedAnomalyResultDTO anomaly : mergedAnomalies) {
- // skip current & baseline filling if the anomaly is not merged
- if (this.isExistingAnomaly(this.existingAnomalies, anomaly)) {
- continue;
- }
try {
String metricUrn = anomaly.getMetricUrn();
MetricEntity me = MetricEntity.fromURN(metricUrn);
diff --git
a/thirdeye/thirdeye-pinot/src/test/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetectorTest.java
b/thirdeye/thirdeye-pinot/src/test/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetectorTest.java
index b63c50b..7ad66d9 100644
---
a/thirdeye/thirdeye-pinot/src/test/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetectorTest.java
+++
b/thirdeye/thirdeye-pinot/src/test/java/org/apache/pinot/thirdeye/detection/components/PercentageChangeRuleDetectorTest.java
@@ -182,7 +182,7 @@ public class PercentageChangeRuleDetectorTest {
percentageRule.init(spec, new DefaultInputDataFetcher(this.provider, -1));
List<MergedAnomalyResultDTO> anomalies = percentageRule.runDetection(new
Interval(1551398400000L, 1551571200000L), "thirdeye:metric:1");
Assert.assertEquals(anomalies.size(), 1);
- Assert.assertEquals(anomalies.get(0).getStartTime(), 1551398400000L);
+ Assert.assertEquals(anomalies.get(0).getStartTime(), 1551484800000L);
Assert.assertEquals(anomalies.get(0).getEndTime(), 1551488400000L);
}
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