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add TiDB 3.1.2 release notes (pingcap#3487)
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* add TiDB 3.1.2 release notes

* Update releases/release-3.1.2.md

* Update releases/release-3.1.2.md

* correct tiup version

* fix a note

* remove tiup version
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TomShawn authored Jun 4, 2020
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1 change: 1 addition & 0 deletions TOC.md
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- [4.0.0-beta.1](/releases/release-4.0.0-beta.1.md)
- [4.0.0-beta](/releases/release-4.0.0-beta.md)
+ v3.1
- [3.1.2](/releases/release-3.1.2.md)
- [3.1.1](/releases/release-3.1.1.md)
- [3.1.0 GA](/releases/release-3.1.0-ga.md)
- [3.1.0-rc](/releases/release-3.1.0-rc.md)
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2 changes: 0 additions & 2 deletions releases/release-3.0.13.md
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Expand Up @@ -10,8 +10,6 @@ aliases: ['/docs-cn/dev/releases/3.0.13/']

TiDB 版本:3.0.13

TiUP 版本:3.0.13

## Bug 修复

+ TiDB
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2 changes: 0 additions & 2 deletions releases/release-3.0.14.md
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TiDB 版本:3.0.14

TiUP 版本:3.0.14

## 兼容性变化

+ TiDB
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27 changes: 27 additions & 0 deletions releases/release-3.1.2.md
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---
title: TiDB 3.1.2 Release Notes
category: Releases
---

# TiDB 3.1.2 Release Notes

发版日期:2020 年 6 月 4 日

TiDB 版本:3.1.2

## Bug 修复

+ TiKV

- 修复 S3 和 GCS 备份恢复时的错误处理问题 [#7965](https://github.com/tikv/tikv/pull/7965)
- 修复备份过程中的 `DefaultNotFound` 错误 [#7838](https://github.com/tikv/tikv/pull/7938)

+ Tools

- Backup & Restore (BR)

- 提升备份恢复到 S3 和 GCS 存储的稳定性,在网络较差时会自动重试 [#314](https://github.com/pingcap/br/pull/314) [#7965](https://github.com/tikv/tikv/pull/7965)
- 修复恢复数据时因找不到 Region leader 出现的 `NotLeader` 错误,BR 会自动重试 [#303](https://github.com/pingcap/br/pull/303)
- 修复恢复数据时 `rowID` 大于 `2^(63)` 的数据丢失问题 [#323](https://github.com/pingcap/br/pull/323)
- 修复恢复数据时无法恢复空库空表的问题 [#318](https://github.com/pingcap/br/pull/318)
- 增加备份恢复 S3 时的 AWS KMS 服务端加密 (SSE) 支持 [#261](https://github.com/pingcap/br/pull/261)
2 changes: 0 additions & 2 deletions releases/release-4.0.0-rc.1.md
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TiDB 版本:4.0.0-rc.1

TiUP 版本:4.0.0-rc.1

## 兼容性变化

+ TiKV
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2 changes: 0 additions & 2 deletions releases/release-4.0.0-rc.2.md
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Expand Up @@ -9,8 +9,6 @@ category: Releases

TiDB 版本:4.0.0-rc.2

TiUP 版本:4.0.0-rc.2

## 兼容性变化

+ TiDB
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1 change: 1 addition & 0 deletions releases/release-notes.md
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Expand Up @@ -19,6 +19,7 @@ TiDB 历史版本发布声明如下:

## 3.1

- [3.1.2](/releases/release-3.1.2.md)
- [3.1.1](/releases/release-3.1.1.md)
- [3.1.0 GA](/releases/release-3.1.0-ga.md)
- [3.1.0-rc](/releases/release-3.1.0-rc.md)
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