[HADOOP-18446] Add a re-queue metric to RpcMetrics.java to quantify the number of re-queue RPCs

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: metrics
• Labels: pull-request-available
• Target Version/s: 3.4.0
• Hadoop Flags: Reviewed
• Assignee: ZanderXu
• Reporter: ZanderXu
• Created: 08/Sep/22 01:23
• Updated: 28/Jan/24 00:10
• Resolved: 16/Sep/22 17:09

Description

Add a reQueue metric to RpcMetrics.java to quantify the number of RPCs reQueued.

Because Observer NameNode will re-queue the rpc if the call processing should be postponed.

 

There is no any metric to quantify the number of re-queue RPCs, so I think we should do it.

Issue Links

• links to: GitHub Pull Request #4871