pingcap / pingcap/ticdc

Weekly random DDL test can stall or fail on false log scan matches

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type/bug
Dominant language
Go
Stars
56
Forks
63
Avg merge
2d 20h
Merged PRs (30d)
34

Description

Weekly random DDL+DML testing exposed two stability issues: event service scan windows need to make progress when syncpoints are pending, and the weekly random log scanners can report false panic/fatal failures when random row payload strings contain those words. Expected behavior is stable weekly coverage without stalling syncpoint delivery or failing on payload substrings. The PR adds the weekly random DDL runner/cases and fixes these issues.

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.

Research direction

Start by locating the weekly random DDL runner and cases, then read the event service scan-window logic around pending syncpoints and the weekly random log scanners. Verify that scan windows continue making progress, syncpoint delivery does not stall, and panic/fatal detection ignores matching words inside random row payloads.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
databases, distributed-systems, testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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