[IMPALA-6520] Display number of rejected RPCs on the /metrics debug page

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Duplicate
• Affects Version/s: Impala 2.12.0
• Fix Version/s: Not Applicable
• Component/s: Backend
• Labels: observability
• Target Version: Impala 2.12.0
• Epic Color: ghx-label-1
• Assignee: Lars Volker
• Reporter: Lars Volker
• Created: 14/Feb/18 00:02
• Updated: 14/Feb/18 23:36
• Resolved: 14/Feb/18 23:36

Description

We should track the count of rejected RPCs on the /metrics debug page. Those should at least include the number of connections that timed out in the queue, and the number of connections that were rejected because the queue overflowed.

Issue Links

• Is contained by: IMPALA-6269 [observability] Add KRPC metrics to /rpcz and /metrics debug webpages