Zhijie Shen created YARN-3881:
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Summary: Writing RM cluster-level metrics
Key: YARN-3881
URL: https://issues.apache.org/jira/browse/YARN-3881
Project: Hadoop YARN
Issue Type: Sub-task
Components: timelineserver
Reporter: Zhijie Shen
Assignee: Zhijie Shen
RM has a bunch of metrics that we may want to write into the timeline backend
to. I attached the metrics.json that I've crawled via
{{http://localhost:8088/jmx?qry=Hadoop:*}}. IMHO, we need to pay attention to
three groups of metrics:
1. QueueMetrics
2. JvmMetrics
3. ClusterMetrics
The problem is that unlike other metrics belongs to a single application, these
ones belongs to RM or cluster-wide. Therefore, current write path is not going
to work for these metrics because they don't have the associated user/flow/app
context info. We need to rethink of modeling cross-app metrics and the api to
handle them.
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