whua3 opened a new pull request, #5306:
URL: https://github.com/apache/hadoop/pull/5306
YARN-11418: Add a new metric that reflects the number of applications whose
FinalStatus is FAILED
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### Description of PR
We are faced with a scenario where the **State** of the application is
**FINISHED**, but the **FinalStatus** is **FAILED**. When the **FinalStatus**
of the application is **FAILED**, we want to show that through metrics.
### How was this patch tested?
create an Application whose FinalStatus is FAILED, and verify that metrics
in JMX are as expected. By the way, the metric is also added to the YARN WebUI.
### For code changes:
- [ ] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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