pingcap / pingcap/tidb-binlog

readTimeout is too small for mysql loader

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severity/moderate type/bug
Dominant language
Go
Stars
291
Forks
131
Avg merge
5m
Merged PRs (30d)
2

Description

Bug Report

Please answer these questions before submitting your issue. Thanks!

  1. What did you do?
    If possible, provide a recipe for reproducing the error.

The hardcoded readTimeout is too small, time consuming DML and DDL may easily timed out.

https://github.com/pingcap/tidb-binlog/blob/53a591e8258a97aefe9f5b705176e4a9d068c59e/pkg/loader/util.go#L149

  1. What did you expect to see?

Extend the default readTimeout and provide a configuration for changing the value manually.

  1. What did you see instead?

Some DML and DDL are timed out.

  1. Please provide the relate downstream type and version of drainer.
    (run drainer -V in terminal to get drainer's version)

v4.0.12

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

Inspect pkg/loader/util.go at the linked line to locate the hardcoded readTimeout, then trace how the MySQL loader receives configuration. Done means the default timeout accommodates time-consuming DML and DDL while the value can be changed manually.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, mysql
Domain
databases
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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