Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

ddl: Fix rename come after database has been dropped (#9274) #9277

Merged

Conversation

ti-chi-bot
Copy link
Member

This is an automated cherry-pick of #9274

What problem does this PR solve?

Issue Number: close #9266

Problem Summary:

In InterpreterRenameQuery, it use context.getDatabase which will throw an exception if the database instance is not exist in tiflash.

The database has been dropped in TiDB before TiFlash sync the schema diff of "create database". And the following rename table to that database (database_id=170) throw exception.

TiDB TiFlash
create table db_2.t_166;
sync create table db_2.t_166 and success
create database db_170;
rename table db_2.t_166 to db_170.t_166;
drop table db_170.t_166;
drop database db_170;
raft-log comes after database has been dropped, tiflash begin its schema sync
begin to sync create db_170 but failed sliently
begin to sync rename db_2.t_166 to db_170.t_166 but exception thrown (crash here)

What is changed and how it works?


In SchemaBuilder::applyRenamePhysicalTable it should create a local IDatabase instance with a "fake" DBInfo if can not fetch from TiKV.

Check List

Tests

  • Unit test
  • Integration test
  • Manual test (add detailed scripts or steps below)
  • No code

Side effects

  • Performance regression: Consumes more CPU
  • Performance regression: Consumes more Memory
  • Breaking backward compatibility

Documentation

  • Affects user behaviors
  • Contains syntax changes
  • Contains variable changes
  • Contains experimental features
  • Changes MySQL compatibility

Release note

Fix a bug that TiFlash may panic when a database is created and then dropped quickly

@ti-chi-bot ti-chi-bot added release-note Denotes a PR that will be considered when it comes time to generate release notes. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR. labels Aug 1, 2024
@ti-chi-bot ti-chi-bot added the cherry-pick-approved Cherry pick PR approved by release team. label Aug 1, 2024
@JaySon-Huang
Copy link
Contributor

/run-all-tests

@JaySon-Huang
Copy link
Contributor

/run-unit-test

@ti-chi-bot ti-chi-bot bot added needs-1-more-lgtm Indicates a PR needs 1 more LGTM. approved labels Aug 1, 2024
Copy link
Member

@CalvinNeo CalvinNeo left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

lgtm

@ti-chi-bot ti-chi-bot bot added lgtm and removed needs-1-more-lgtm Indicates a PR needs 1 more LGTM. labels Aug 2, 2024
Copy link
Contributor

ti-chi-bot bot commented Aug 2, 2024

[LGTM Timeline notifier]

Timeline:

  • 2024-08-01 06:32:20.351411234 +0000 UTC m=+423856.631459303: ☑️ agreed by Lloyd-Pottiger.
  • 2024-08-02 08:01:42.033662686 +0000 UTC m=+76499.252424295: ☑️ agreed by CalvinNeo.

Copy link
Contributor

ti-chi-bot bot commented Aug 2, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: CalvinNeo, Lloyd-Pottiger

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:
  • OWNERS [CalvinNeo,Lloyd-Pottiger]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

@ti-chi-bot ti-chi-bot bot merged commit 8aec59f into pingcap:release-8.1 Aug 2, 2024
5 checks passed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
approved cherry-pick-approved Cherry pick PR approved by release team. lgtm release-note Denotes a PR that will be considered when it comes time to generate release notes. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

4 participants