Daniel Templeton created YARN-4901:
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Summary: MockRM should clear the QueueMetrics when it starts
Key: YARN-4901
URL: https://issues.apache.org/jira/browse/YARN-4901
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Reporter: Daniel Templeton
Assignee: Daniel Templeton
The {{ResourceManager}} rightly assumes that when it starts, it's starting from
naught. The {{MockRM}}, however, violates that assumption. For example, in
{{TestNMReconnect}}, each test method creates a new {{MockRM}} instance. The
{{QueueMetrics.queueMetrics}} field is static, which means that when multiple
{{MockRM}} instances are created, the {{QueueMetrics}} bleed over. Having the
MockRM clear the {{QueueMetrics}} when it starts should resolve the issue. I
haven't looked yet at scope to see how hard easy that is to do.
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