HDFS-16447. RBF: Registry HDFS Router's RPCServer & RPCClient metrics for PrometheusSink #3965
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Description of PR
https://issues.apache.org/jira/browse/HDFS-16447
When we enable PrometheusSink for HDFS Router, Router' prometheus sink miss some metrics, for example
RpcClientNumActiveConnectionsand so on.We need registry some Router's rpcserver & rpcclient metrics for PrometheusSink.
How was this patch tested?
no new test
For code changes:
use
@Metricto registry metrics.