apache/pinot

Deep Stack Trace from Long Min/Max Column Values

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#17,378 opened on Dec 16, 2025

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Description

If a column has a very long value, and it ends up being either the min or max, then it gets stored in the segment metadata file.

When the properties reader is used to read such a file, we can have a very deep recursion call stack due to some regex matching.

Contributor guide

Research direction
Identify the regex pattern causing stack overflow in properties reader and reimplement it iteratively or with bounded recursion.
Tech stack
java
Domain
database
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.
75