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MAPREDUCE-6966. DistSum should use Time.monotonicNow for measuring durations. Contributed by Chetna Chaudhari. 

(cherry picked from commit c71d137960)
This commit is contained in:
Akira Ajisaka 2017-09-22 15:07:59 +09:00
parent 0af3aec502
commit cbb3294e2d
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1 changed files with 3 additions and 2 deletions
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hadoop-mapreduce-project/hadoop-mapreduce-examples/src/main/java/org/apache/hadoop/examples/pi/DistSum.java
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@ -51,6 +51,7 @@ import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.TaskInputOutputContext;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.util.Time;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.slf4j.Logger;
@ -162,9 +163,9 @@ public final class DistSum extends Configured implements Tool {
LOG.info(s = "sigma=" + sigma);
context.setStatus(s);
final long start = System.currentTimeMillis();
final long start = Time.monotonicNow();
sigma.compute();
final long duration = System.currentTimeMillis() - start;
final long duration = Time.monotonicNow() - start;
final TaskResult result = new TaskResult(sigma, duration);
LOG.info(s = "result=" + result);