Daniel Templeton created YARN-4795:
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Summary: ContainerMetrics drops records
Key: YARN-4795
URL: https://issues.apache.org/jira/browse/YARN-4795
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.9.0
Reporter: Daniel Templeton
Assignee: Daniel Templeton
The metrics2 system was implemented to deal with persistent sources.
{{ContainerMetrics}} is an ephemeral source, and so it causes problems.
Specifically, the {{ContainerMetrics}} only reports metrics once after the
container has been stopped. This behavior is a problem because the metrics2
system can ask sources for reports that will be quietly dropped by the sinks
that care. (It's a metrics2 feature, not a bug.) If that final report is
silently dropped, it's lost, because the {{ContainerMetrics}} won't report
anything else ever anymore.
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