symious opened a new pull request #3638:
URL: https://github.com/apache/hadoop/pull/3638
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### Description of PR
Currently we have metrics to track the operations for Router to all
nameservices, like "FederationRPCMetrics", but we don't have metrics for Router
to each nameservices.
This ticket is to add metrics for each nameservice to better track the
performance of each sub cluster.
Jira ticket: https://issues.apache.org/jira/browse/HDFS-16313
### How was this patch tested?
unit test
### For code changes:
- [x] 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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