leo sun created HADOOP-18502:
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Summary: Hadoop metrics should return 0 when there is no change
Key: HADOOP-18502
URL: https://issues.apache.org/jira/browse/HADOOP-18502
Project: Hadoop Common
Issue Type: Improvement
Reporter: leo sun
Assignee: leo sun
Attachments: image-2022-10-21-14-41-43-105.png
When we try to switch active NN to standby, we find that the getContentSummary
average time is always a very high value even if there is no more query. For
us, the metrics return 0 is more reasonable. The monitor is as below:
!image-2022-10-21-14-41-43-105.png!
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