HADOOP-4369. Use setMetric(...) instead of incrMetric(...) for metrics averages.

  Contributed by Brian Bockelman


git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/trunk@706456 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -1018,6 +1018,9 @@ Release 0.18.2 - Unreleased
     HADOOP-4399. Make fuse-dfs multi-thread access safe.
     (Pete Wyckoff via dhruba)
 
+    HADOOP-4369. Use setMetric(...) instead of incrMetric(...) for metrics
+    averages.  (Brian Bockelman via szetszwo)
+
 Release 0.18.1 - 2008-09-17
 
   IMPROVEMENTS

src/core/org/apache/hadoop/metrics/util/MetricsTimeVaryingRate.java

@@ -134,7 +134,7 @@ public class MetricsTimeVaryingRate {
     intervalHeartBeat();
     try {
       mr.incrMetric(name + "_num_ops", getPreviousIntervalNumOps());
-      mr.incrMetric(name + "_avg_time", getPreviousIntervalAverageTime());
+      mr.setMetric(name + "_avg_time", getPreviousIntervalAverageTime());
     } catch (Exception e) {
       LOG.info("pushMetric failed for " + name + "\n" +
           StringUtils.stringifyException(e));