For long task timers fixes the percentiles above interpolatable line #4511
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marcingrzejszczak
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shakuzen
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Jan 17, 2024
| SimpleMeterRegistry simpleMeterRegistry = new SimpleMeterRegistry(); | ||
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| LongTaskTimer timer = LongTaskTimer.builder("jobrunr.jobs") | ||
| .publishPercentiles(0.25, 0.5, 0.75, 0.8, 0.9, 0.95) |
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The test fails if this is changed to the other example given in the issue: 0.11, 0.22, 0.33, 0.44. I'm not sure why it makes a difference to be honest but the following change makes both cases pass without the change to DefaultLongTaskTimer.
Index: micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/HistogramGauges.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
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diff --git a/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/HistogramGauges.java b/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/HistogramGauges.java
--- a/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/HistogramGauges.java (revision e38f5e87dac6566e7909628afa7aa4f7fde6f170)
+++ b/micrometer-core/src/main/java/io/micrometer/core/instrument/distribution/HistogramGauges.java (date 1705478240207)
@@ -116,7 +116,7 @@
ToDoubleFunction<HistogramSupport> percentileValueFunction = m -> {
snapshotIfNecessary();
polledGaugesLatch.countDown();
- return percentileValue.apply(snapshot.percentileValues()[index]);
+ return percentileValue.apply(valueAtPercentiles[index]);
};
Gauge.builder(percentileName.apply(valueAtPercentiles[i]), meter, percentileValueFunction)There was a problem hiding this comment.
My suggested change is not correct. We definitely need more tests in this area of the code to be confident the behavior is correct. I'll take a closer look tomorrow soon.
without this change for the provided test one of the histogram buckets gets removed and an ArrayIndexOutOfBoundsException is thrown with this change the exception is not thrown anymore fixes gh-3877
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without this change for the provided test one of the histogram buckets gets removed and an ArrayIndexOutOfBoundsException is thrown with this change the exception is not thrown anymore
fixes gh-3877