Skip to content

releases: add tidb 5.0.1 release notes #5392

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.

Sign up for GitHub

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

Merged
ti-chi-bot merged 19 commits into from
Apr 24, 2021
Merged

releases: add tidb 5.0.1 release notes #5392

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
19 commits
Select commit Hold shift + click to select a range
81a8790
update v5.0.1 release notes at 2021-04-19T16:56:06
ti-srebot Apr 19, 2021
d759a97
toc
TomShawn Apr 19, 2021
37aec77
add tidb and tikv notes
TomShawn Apr 20, 2021
683b14b
Apply suggestions from code review
TomShawn Apr 20, 2021
d6a8324
Update releases/release-5.0.1.md
amyangfei Apr 20, 2021
64f0504
Update releases/release-5.0.1.md
amyangfei Apr 20, 2021
19dd22d
Update releases/release-5.0.1.md
amyangfei Apr 20, 2021
ab379cd
add tools and tiflash notes
TomShawn Apr 20, 2021
657cd05
add pd notes
TomShawn Apr 21, 2021
cbeed40
fix language bugs
TomShawn Apr 22, 2021
72bebc3
fix confusing notes according to coworkers
TomShawn Apr 22, 2021
ca36b37
Update release-5.0.1.md
TomShawn Apr 22, 2021
853f302
Apply suggestions from code review
TomShawn Apr 23, 2021
a90cfec
Update releases/release-5.0.1.md
TomShawn Apr 23, 2021
cb5b687
Update releases/release-5.0.1.md
TomShawn Apr 23, 2021
05e81c1
Update releases/release-5.0.1.md
TomShawn Apr 23, 2021
4d8e69e
Update releases/release-5.0.1.md
TomShawn Apr 23, 2021
1d9508d
Update releases/release-5.0.1.md
TomShawn Apr 23, 2021
b104678
Update releases/release-5.0.1.md
TomShawn Apr 24, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions TOC.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -537,6 +537,7 @@
+ [All Releases](/releases/release-notes.md)
+ [TiDB Roadmap](/roadmap.md)
+ v5.0
+ [5.0.1](/releases/release-5.0.1.md)
+ [5.0 GA](/releases/release-5.0.0.md)
+ [5.0.0-rc](/releases/release-5.0.0-rc.md)
+ v4.0
Expand Down
88 changes: 88 additions & 0 deletions releases/release-5.0.1.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
---
title: TiDB 5.0.1 Release Notes
---

# TiDB 5.0.1 Release Notes

Release date: April 24, 2021

TiDB version: 5.0.1

## Improvements

Copy link
Copy Markdown
Contributor

@3pointer 3pointer Apr 20, 2021 •
edited
Loading

Choose a reason for hiding this comment

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

Suggested change
+Tools
- BR
* Fix the issue that the summary log is not clear. [#1009](https://github.com/pingcap/br/pull/1009)

+ TiKV

- Use `zstd` to compress the Region snapshot [#10005](https://github.com/tikv/tikv/pull/10005)

Copy link
Copy Markdown

@5kbpers 5kbpers Apr 20, 2021

Choose a reason for hiding this comment

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

Suggested change
+ TiKV
- Use `zstd` to compress the snapshot [#10005](https://github.com/tikv/tikv/pull/10005)

+ PD

- Modify the Region score calculator to better satisfy isomerous stores [#3605](https://github.com/pingcap/pd/pull/3605)
- Avoid unexpected statistics after adding the `scatter region` scheduler [#3602](https://github.com/pingcap/pd/pull/3602)

+ Tools

+ Backup & Restore (BR)

- Remove some misleading information from the summary log [#1009](https://github.com/pingcap/br/pull/1009)

Copy link
Copy Markdown
Contributor

@solotzg solotzg Apr 19, 2021

Choose a reason for hiding this comment

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

- Fix the potential issue that storage engine fails to remove some data while executing `DeleteRange`
- Fix a bug that the function to cast time as int may produce incorrect result
- Fix a bug that receiver cannot find tasks within 10s
- Fix the potential issue that there may be invalid iterators in `cancelMPPQuery`
- Fix a bug that behavior of `bitwise` operator is different from TiDB
- Fix the issue that alert about overlapped ranges will be raised when using prefix key
- Fix a bug that the function to cast string as int may produce incorrect result
- Fix the issue that continuous and fast writing may make TiFlash OOM
- Fix the issue that duplicated column name will make TiFlash raise error
- Fix the issue that TiFlash fails to decode MPP plan
- Fix the potential issue that null pointer exception may be raised during table GC
- Fix the issue that TiFlash may panic while applying raft commands to dropped tables
- Fix the issue that TiFlash may panic during BR restore

Copy link
Copy Markdown
Member

@nolouch nolouch Apr 21, 2021

Choose a reason for hiding this comment

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

  • PD
    • Modify score calculator to satisfy isomerous stores #3605
    • Avoid unexpected statistic modify after adding scatter region scheduler #3602

## Bug Fixes

+ TiDB

- Fix the issue that the execution result of project elimination might be wrong when the projection result is empty [#24093](https://github.com/pingcap/tidb/pull/24093)
- Fix the issue of wrong query results when a column contains `NULL` values in some cases [#24063](https://github.com/pingcap/tidb/pull/24063)
- Forbid generating MPP plans when the scan contains virtual columns [#24058](https://github.com/pingcap/tidb/pull/24058)
- Fix the wrong reuse of `PointGet` and `TableDual` in Plan Cache [#24043](https://github.com/pingcap/tidb/pull/24043)
- Fix the error that occurs when the optimizer builds the `IndexMerge` plan for clustered indexes [#24042](https://github.com/pingcap/tidb/pull/24042)
- Fix the type inference of the BIT-type errors [#24027](https://github.com/pingcap/tidb/pull/24027)
- Fix the issue that some optimizer hints do not take effect when the `PointGet` operator exists [#23685](https://github.com/pingcap/tidb/pull/23685)
- Fix the issue that DDL operations might fail when rolling back due to an error [#24080](https://github.com/pingcap/tidb/pull/24080)
- Fix the issue that the index range of the binary literal constant is incorrectly built [#24041](https://github.com/pingcap/tidb/pull/24041)
- Fix the potential wrong results of the `IN` clause in some cases [#24023](https://github.com/pingcap/tidb/pull/24023)
- Fix the wrong results of some string functions [#23879](https://github.com/pingcap/tidb/pull/23879)
- Users now need both `INSERT` and `DELETE` privileges on a table to perform `REPLACE` operations [#23939](https://github.com/pingcap/tidb/pull/23939)
- Fix the performance regression when executing the point query [#24070](https://github.com/pingcap/tidb/pull/24070)
- Fix the wrong `TableDual` plans caused by incorrectly comparing binaries and bytes [#23918](https://github.com/pingcap/tidb/pull/23918)

+ TiKV

- Fix the issue that the coprocessor fails to properly handle the signed or unsigned integer types in the `IN` expression [#10018](https://github.com/tikv/tikv/pull/10018)
- Fix the issue of many empty Regions after batch ingesting SST files [#10015](https://github.com/tikv/tikv/pull/10015)
- Fix the potential panic that occurs when the input of `cast_string_as_time` is invalid UTF-8 bytes [#9995](https://github.com/tikv/tikv/pull/9995)
- Fix a bug that TiKV cannot start up after the file dictionary file is damaged [#9992](https://github.com/tikv/tikv/pull/9992)

Copy link
Copy Markdown
Contributor

@3pointer 3pointer Apr 20, 2021 •
edited
Loading

Choose a reason for hiding this comment

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

Suggested change
+ Tools
- Lightning
* Fix the bug that the table count in the progress log is wrong. [#1005](https://github.com/pingcap/br/pull/1005)
- BR
* Fix the bug that caused the real backup speed may go beyond far the `--ratelimit`. [#1026](https://github.com/pingcap/br/pull/1026)
* Fix the issue that BR cannot tolerate minor TiKV disconnection. [#1019](https://github.com/pingcap/br/pull/1019)
- TiCDC
* Fix data race and unhelpful error message in unified sorter. [#1678](https://github.com/pingcap/ticdc/pull/1678)
* Fix the bug that redundant directory creation may cause replication interruption with minio. [#1672]
* Set session variable `explicit_defaults_for_timestamp` to `ON` to make downstream MySQL5.7 keeps the same behavior with upstream TiDB. [#1659](https://github.com/pingcap/ticdc/pull/1659)
* Fix the error handling for io.EOF may cause replication interruption. [#1648](https://github.com/pingcap/ticdc/pull/1648)
* Correct TiKV CDC endpoint CPU metric in TiCDC dashboard. [#1645](https://github.com/pingcap/ticdc/pull/1645)
* Increase the defaultBufferChanSize of logSink to avoid blocking [#1632](https://github.com/pingcap/ticdc/pull/1632)

+ TiFlash

- Fix the issue that the storage engine fails to remove the data of some ranges
- Fix the issue of incorrect results when casting the time type to the integer type
- Fix a bug that the `receiver` cannot find corresponding tasks within 10 seconds
- Fix the issue that there might be invalid iterators in `cancelMPPQuery`
- Fix a bug that the behavior of the `bitwise` operator is different from that of TiDB
- Fix the alert issue caused by overlapping ranges when using the `prefix key`
- Fix the issue of incorrect results when casting the string type to the integer type
- Fix the issue that consecutive and fast writes might make TiFlash out of memory
- Fix the issue that duplicated column names will make TiFlash raise errors
- Fix the issue that TiFlash fails to parse MPP plans
- Fix the potential issue that the exception of null pointer might be raised during the table GC
- Fix the TiFlash panic issue that occurs when writing data to dropped tables
- Fix the issue that TiFlash might panic during BR restore

+ Tools

+ TiDB Lightning

- Fix the issue of the inaccurate table count in the progress log during the import [#1005](https://github.com/pingcap/br/pull/1005)

Comment thread
TomShawn marked this conversation as resolved.
+ Backup & Restore (BR)

Comment thread
TomShawn marked this conversation as resolved.
- Fix a bug that the actual backup speed exceeds the `--ratelimit` limit [#1026](https://github.com/pingcap/br/pull/1026)
- Fix the issue of backup interruption caused by the failure of a few TiKV nodes [#1019](https://github.com/pingcap/br/pull/1019)

+ TiCDC

- Fix the concurrency issue in Unified Sorter and filter the unhelpful error messages [#1678](https://github.com/pingcap/ticdc/pull/1678)
- Fix a bug that the creation of redundant directories might interrupt the replication with MinIO [#1672](https://github.com/pingcap/ticdc/pull/1672)
- Set the default value of the `explicit_defaults_for_timestamp` session variable to `ON` to make the MySQL 5.7 downstream keep the same behavior with the upstream TiDB [#1659](https://github.com/pingcap/ticdc/pull/1659)
- Fix the issue that the incorrect handling of `io.EOF` might cause replication interruption [#1648](https://github.com/pingcap/ticdc/pull/1648)
- Correct the TiKV CDC endpoint CPU metric in the TiCDC dashboard [#1645](https://github.com/pingcap/ticdc/pull/1645)
- Increase `defaultBufferChanSize` to avoid replication blocking in some cases [#1632](https://github.com/pingcap/ticdc/pull/1632)
1 change: 1 addition & 0 deletions releases/release-notes.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ aliases: ['/docs/dev/releases/release-notes/','/docs/dev/releases/rn/']

## 5.0

- [5.0.1](/releases/release-5.0.1.md)
- [5.0 GA](/releases/release-5.0.0.md)
- [5.0.0-rc](/releases/release-5.0.0-rc.md)

Expand Down