apache/pinot

`SchemaUtils` Doesn't Show the Actual Reason for Validation Failure

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#14,787 opened on Jan 9, 2025

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 (3 comments) (0 reactions) (0 assignees)Java (1,234 forks)batch import
buggood first issue

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Description

Often when our customers try to deploy, Pinot returns Schema is incompatible with tableConfig with no details about the root-cause. We should try to return the exact reason why the Schema validation had failed.

https://github.com/apache/pinot/blob/6a8bdb5e5e691381cda5122b03c6c3fd7b6fd265/pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/SchemaUtils.java#L170-L181

Contributor guide

Research direction
Examine the validate() method in SchemaUtils.java, specifically the section that throws the generic exception. Identify the internal validation methods (e.g., validateSchemaWithTableConfig) and capture the actual failure reason. Modify the exception message to include that reason.
Tech stack
java
Domain
backenddatabase
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
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
JavaGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80