ferhui commented on a change in pull request #3630:
URL: https://github.com/apache/hadoop/pull/3630#discussion_r746287734
##########
File path:
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/lib/MutableRollingAverages.java
##########
@@ -167,7 +167,7 @@ synchronized void replaceScheduledTask(int windows, long
interval,
}
@Override
- public void snapshot(MetricsRecordBuilder builder, boolean all) {
+ public synchronized void snapshot(MetricsRecordBuilder builder, boolean all)
{
Review comment:
Do we need synchronized here? Its super class is not.
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