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MAPREDUCE-3313. Fixed initialization of ClusterMetrics which was failing TestResourceTrackerService sometimes. Contributed by Hitesh Shah. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1195319 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Vinod Kumar Vavilapalli 2011-10-31 03:30:56 +00:00
parent 1c8d64f38a
commit 273e092c93
3 changed files with 13 additions and 4 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -1865,6 +1865,9 @@ Release 0.23.0 - Unreleased
MAPREDUCE-3274. Fixed a race condition in MRAppMaster that was causing a
task-scheduling deadlock. (Robert Joseph Evans via vinodkv)
MAPREDUCE-3313. Fixed initialization of ClusterMetrics which was failing
TestResourceTrackerService sometimes. (Hitesh Shah via vinodkv)
Release 0.22.0 - Unreleased
INCOMPATIBLE CHANGES

7
hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClusterMetrics.java
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@ -20,6 +20,8 @@
import static org.apache.hadoop.metrics2.lib.Interns.info;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.metrics2.MetricsInfo;
import org.apache.hadoop.metrics2.MetricsSystem;
@ -35,6 +37,8 @@
@Metrics(context="yarn")
public class ClusterMetrics {
private static AtomicBoolean isInitialized = new AtomicBoolean(false);
@Metric("# of NMs") MutableGaugeInt numNMs;
@Metric("# of decommissioned NMs") MutableCounterInt numDecommissionedNMs;
@Metric("# of lost NMs") MutableCounterInt numLostNMs;
@ -48,11 +52,12 @@ public class ClusterMetrics {
private static MetricsRegistry registry;
public static ClusterMetrics getMetrics() {
if(INSTANCE == null){
if(!isInitialized.get()){
synchronized (ClusterMetrics.class) {
if(INSTANCE == null){
INSTANCE = new ClusterMetrics();
registerMetrics();
isInitialized.set(true);
}
}
}

7
hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/TestResourceTrackerService.java
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@ -31,7 +31,6 @@
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ContainerStatus;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.exceptions.YarnRemoteException;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.server.api.protocolrecords.RegisterNodeManagerRequest;
@ -67,8 +66,10 @@ public void testDecommissionWithIncludeHosts() throws Exception {
MockNM nm1 = rm.registerNode("host1:1234", 5120);
MockNM nm2 = rm.registerNode("host2:5678", 10240);
int initialMetricCount = ClusterMetrics.getMetrics()
.getNumDecommisionedNMs();
ClusterMetrics metrics = ClusterMetrics.getMetrics();
assert(metrics != null);
int initialMetricCount = metrics.getNumDecommisionedNMs();
HeartbeatResponse nodeHeartbeat = nm1.nodeHeartbeat(true);
Assert.assertTrue(NodeAction.NORMAL.equals(nodeHeartbeat.getNodeAction()));