apache/beam

[Feature Request]: add drain() method to PipelineResult

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#38,771 opened on Jun 2, 2026

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 (1 comment) (0 reactions) (1 assignee)Java (4,097 forks)batch import
P3good first issuejavanew feature

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Description

What would you like to happen?

both Flink and Dataflow supports that. PipelineResult allow stopping pipeline, drain may be helpful addition.

Issue Priority

Priority: 3 (nice-to-have improvement)

Issue Components

  • Component: Python SDK
  • Component: Java SDK
  • Component: Go SDK
  • Component: Typescript SDK
  • Component: IO connector
  • Component: Beam YAML
  • Component: Beam examples
  • Component: Beam playground
  • Component: Beam katas
  • Component: Website
  • Component: Infrastructure
  • Component: Spark Runner
  • Component: Flink Runner
  • Component: Prism Runner
  • Component: Twister2 Runner
  • Component: Hazelcast Jet Runner
  • Component: Google Cloud Dataflow Runner

Contributor guide

Research direction
Examine the existing PipelineResult stop() implementation in the Java SDK, then research how Flink and Dataflow runners implement drain() to model the new method.
Tech stack
java
Domain
backendapi
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.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaApache Beam basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65