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

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(cherry picked from commit c71d13796039815350d3c73c51f9fe48531af0fa)
This commit is contained in:
Akira Ajisaka 2017-09-22 15:07:59 +09:00
parent 9d4de9c556
commit d80e2f2eae
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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.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 @@ static void compute(Summation sigma,
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);