opensearch-project/OpenSearch

[BUG] Support global params in GRPC server

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#19,092 opened on Aug 16, 2025

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 (4 comments) (0 reactions) (1 assignee)Java (1,505 forks)batch import
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Description

Describe the bug

Global parameters are currently unsupported in the GRPC server.

These global parameter fields exist in the protobufs (e.g. Bulk, Search), but their functionality is a no-op, as they are not read in the transport-grpc module.

Related component

Other

To Reproduce

Submit a GRPC query with these fields populated. Results will be the same no matter what values are provided for these fields.

Expected behavior

Responses may be different depending on the value of the fields provided.

Additional Details

Additional context

As a general problem to consider: how may we be able to detect unimplemented protobuf fields on the server side?

Contributor guide

Research direction
Inspect the transport grpc module in the OpenSearch repository to find where global parameters are expected to be read from protobufs. Trace the handler path for a request like Bulk or Search to see how fields are currently ignored. Then implement the reading of those fields and integrate them into the existing request processing pipeline. Also consider adding a mechanism to detect unimplemented protobuf fields as suggested in the issue.
Tech stack
java
Domain
backendapi
Issue type
Bug
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.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavagRPCprotobuf
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35