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https://issues.apache.org/jira/browse/HADOOP-18364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He resolved HADOOP-18364.
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Fix Version/s: 3.4.0
Hadoop Flags: Reviewed
Resolution: Fixed
Committed to trunk. Thanks [~zhangshuyan] for your contribution. Please let me
know if you want to backport to other active branches.
> All method metrics related to the RPC protocol should be initialized
> --------------------------------------------------------------------
>
> Key: HADOOP-18364
> URL: https://issues.apache.org/jira/browse/HADOOP-18364
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> When an RPC protocol is used, the metric of protocol-related methods should
> be initialized; otherwise, metric information will be incomplete. For
> example, when we call HAServiceProtocol#monitorHealth(), only the metric of
> monitorHealth() are initialized, and the metric of transitionToStandby() are
> still not reported. This incompleteness caused a little trouble for our
> monitoring system.
> The root cause is that the parameter passed by RpcEngine to
> MutableRatesWithAggregation#init(java.lang.Class<?>) is always
> XXXProtocolPB, which is inherited from BlockingInterface and does not
> implement any methods. We should fix this bug.
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