apache/beam

Check immutability violations in Dataflow Runner (as an option)

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#19,400 opened on Jun 3, 2022

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Description

Users are going to mutate inputs and outputs of DoFn inappropriately. We should help their tests fail to catch such mistakes. (Similar to the DirectPipelineRunner in Java SDK) This should be offered as an option and worked based on sampling because of the cost of these checks.

Imported from Jira BEAM-7395. Original Jira may contain additional context. Reported by: altay.

Contributor guide

Research direction
Investigate how DirectPipelineRunner implements immutability checks and then implement similar checks with sampling in DataflowRunner.
Tech stack
java
Domain
backenddata
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.
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.
Mostly clear
Prerequisites
JavaApache Beam concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40