HADOOP-16248. MutableQuantiles leak memory under heavy load.

Alexis-D · steveloughran · commit 4cb3da6ac703 · 2019-05-17T15:15:22.000+01:00
Contributed by Alexis Daboville,
diff --git a/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/lib/MutableQuantiles.java b/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/lib/MutableQuantiles.java
@@ -107,7 +107,7 @@ public MutableQuantiles(String name, String description, String sampleName,
     estimator = new SampleQuantiles(quantiles);
 
     this.interval = interval;
-    scheduledTask = scheduler.scheduleAtFixedRate(new RolloverSample(this),
+    scheduledTask = scheduler.scheduleWithFixedDelay(new RolloverSample(this),
         interval, interval, TimeUnit.SECONDS);
   }
 

Original file line number	Diff line number	Diff line change
`@@ -107,7 +107,7 @@ public MutableQuantiles(String name, String description, String sampleName,`
`107`	`107`	`estimator = new SampleQuantiles(quantiles);`
`108`	`108`
`109`	`109`	`this.interval = interval;`
`110`		`- scheduledTask = scheduler.scheduleAtFixedRate(new RolloverSample(this),`
	`110`	`+ scheduledTask = scheduler.scheduleWithFixedDelay(new RolloverSample(this),`
`111`	`111`	`interval, interval, TimeUnit.SECONDS);`
`112`	`112`	`}`
`113`	`113`