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HADOOP-11301. [optionally] update jmx cache to drop old metrics (Maysam Yabandeh via stack) 

(cherry picked from commit b36f292982)
This commit is contained in:
stack 2014-12-01 23:07:05 -08:00
parent 76245dfccd
commit 6d904985e8
3 changed files with 56 additions and 3 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -41,6 +41,9 @@ Release 2.7.0 - UNRELEASED
HADOOP-11341. KMS support for whitelist key ACLs. (Arun Suresh via wang)
HADOOP-11301. [optionally] update jmx cache to drop old metrics
(Maysam Yabandeh via stack)
OPTIMIZATIONS
HADOOP-11323. WritableComparator#compare keeps reference to byte array.

5
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSourceAdapter.java
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@ -173,9 +173,8 @@ class MetricsSourceAdapter implements DynamicMBean {
}
synchronized(this) {
int oldCacheSize = attrCache.size();
int newCacheSize = updateAttrCache();
if (oldCacheSize < newCacheSize) {
updateAttrCache();
if (getAllMetrics) {
updateInfoCache();
}
jmxCacheTS = Time.now();

51
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics2/impl/TestMetricsSourceAdapter.java
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@ -23,6 +23,8 @@ import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.metrics2.MetricsCollector;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.metrics2.MetricsSource;
import org.apache.hadoop.metrics2.MetricsTag;
import org.apache.hadoop.metrics2.annotation.Metric;
@ -31,10 +33,59 @@ import org.apache.hadoop.metrics2.lib.MetricsAnnotations;
import org.apache.hadoop.metrics2.lib.MetricsRegistry;
import org.apache.hadoop.metrics2.lib.MetricsSourceBuilder;
import org.apache.hadoop.metrics2.lib.MutableCounterLong;
import static org.apache.hadoop.metrics2.lib.Interns.info;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
public class TestMetricsSourceAdapter {
@Test
public void testPurgeOldMetrics() throws Exception {
// create test source with a single metric counter of value 1
PurgableSource source = new PurgableSource();
MetricsSourceBuilder sb = MetricsAnnotations.newSourceBuilder(source);
final MetricsSource s = sb.build();
List<MetricsTag> injectedTags = new ArrayList<MetricsTag>();
MetricsSourceAdapter sa = new MetricsSourceAdapter(
"tst", "tst", "testdesc", s, injectedTags, null, null, 1, false);
MBeanInfo info = sa.getMBeanInfo();
boolean sawIt = false;
for (MBeanAttributeInfo mBeanAttributeInfo : info.getAttributes()) {
sawIt |= mBeanAttributeInfo.getName().equals(source.lastKeyName);
};
assertTrue("The last generated metric is not exported to jmx", sawIt);
Thread.sleep(1000); // skip JMX cache TTL
info = sa.getMBeanInfo();
sawIt = false;
for (MBeanAttributeInfo mBeanAttributeInfo : info.getAttributes()) {
sawIt |= mBeanAttributeInfo.getName().equals(source.lastKeyName);
};
assertTrue("The last generated metric is not exported to jmx", sawIt);
}
//generate a new key per each call
class PurgableSource implements MetricsSource {
int nextKey = 0;
String lastKeyName = null;
@Override
public void getMetrics(MetricsCollector collector, boolean all) {
MetricsRecordBuilder rb =
collector.addRecord("purgablesource")
.setContext("test");
lastKeyName = "key" + nextKey++;
rb.addGauge(info(lastKeyName, "desc"), 1);
}
}
@Test
public void testGetMetricsAndJmx() throws Exception {
// create test source with a single metric counter of value 0