Compaction OffsetMap fails when hash index is Integer.MIN_VALUE

Open Beginner friendly
#10,831 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
72/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
java
Domain
distributed-systems

Research direction

Search for CompactionLog.OffsetMap and inspect how its hash index is converted before the table capacity is applied. Add coverage for Integer.MIN_VALUE and verify that compaction lookup maps it to a valid non-negative entry without producing an invalid ByteBuffer position.

Written by the indexing model from the issue text.

Description

CompactionLog.OffsetMap uses Math.abs(index) before applying the table capacity. Math.abs(Integer.MIN_VALUE) remains negative, which can produce a negative ByteBuffer position and break compaction lookup. Expected behavior: map every hash value, including Integer.MIN_VALUE, to a valid non-negative entry.

Dominant language
Java
Stars
22.6k
Forks
12k
Avg merge
3d 12h
Merged PRs (30d)
25

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from apache/rocketmq

All issues in apache/rocketmq

Similar issues

More Java issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.