elastic/elasticsearch

Feature Request - query/fetch/scroll failure count stats

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#46,641 opened on Sep 11, 2019

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:Core/Infra/Stats>featureTeam:Core/Infragood first issue

Description

Describe the feature: Today there are helpful shard level search stats on query_total/fetch_total etc. Can we augment it with failure stats as well eg. query_failure_total; fetch_failure_total etc?

Is there any other existing way to already get shard/search failure rates except tracking it on the client side?

Contributor guide

Tech stack
javarest api
Domain
backendobservabilityperformance
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaElasticsearch internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Examine the Elasticsearch source code to find where query total and fetch total stats are defined (likely in search or shard stats classes). Add new counters query failure total and fetch failure total in the same locations. Ensure the new stats are exposed via the appropriate APIs (e.g., node stats, cluster stats). Review the existing implementation for consistency. No linked PRs were found.