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add v6.5.3 release notes #14168

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173 changes: 173 additions & 0 deletions releases/release-6.5.3.md
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---
title: TiDB 6.5.3 Release Notes
summary: 了解 TiDB 6.5.3 版本的兼容性变更、改进提升,以及错误修复。
---

# TiDB 6.5.3 Release Notes

发版日期:2023 年 x 月 x 日

TiDB 版本:6.5.3

试用链接:[快速体验](https://docs.pingcap.com/zh/tidb/v6.5/quick-start-with-tidb) | [生产部署](https://docs.pingcap.com/zh/tidb/v6.5/production-deployment-using-tiup) | [下载离线包](https://cn.pingcap.com/product-community/?version=v6.5.3#version-list)

## 兼容性变更

- note 1

## 改进提升

+ TiDB

<!--tw:ran-huang-->
- 提升了 TRUNCATE 分区表(带放置规则)操作的速度。[#43070](https://github.com/pingcap/tidb/issues/43070) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger)
- 在 resolve lock 之后避免 stale-read 的无效重试。[#43659](https://github.com/pingcap/tidb/issues/43659) @[you06](https://github.com/you06)
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(dup: release-6.5.2.md > 改进提升> TiDB)- 优化带 Limit 的 Range 类型分区表的 `distsql_concurrency` 设置以降低查询延迟 [#41480](https://github.com/pingcap/tidb/issues/41480) @[you06](https://github.com/you06) @[you06](https://github.com/you06)
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- 在 stale-read 遇到 data-is-not-ready 时使用 leader read 降低延迟。#[765](https://github.com/tikv/client-go/pull/765) @[Tema](https://github.com/Tema)
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+ TiKV

- note 1
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+ PD

<!--tw:ran-huang-->
- PD Leader 选举使用单独的 gRPC 链接,防止受其它请求影响。#[6464](https://github.com/tikv/pd/pull/6454) @[rleungx](https://github.com/rleungx)
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+ TiFlash

- note 1

+ Tools

+ Backup & Restore (BR)

- note 1

+ TiCDC

- note 1
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+ TiDB Data Migration (DM)

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+ TiDB Lightning

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## 错误修复

+ TiDB

<!--tw:ran-huang-->
- 修复一个 min, max 查询结果出错的问题 [#43805](https://github.com/pingcap/tidb/issues/43805) @[wshwsh12](https://github.com/wshwsh12)
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- 修复一个窗口函数计算下推到 tiflash 时执行计划构造错误的问题 [#43981](https://github.com/pingcap/tidb/issues/43981) @[gengliqi](https://github.com/gengliqi)
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- 修复一个使用 CTE 的查询 hang 住的问题 [#43758](https://github.com/pingcap/tidb/issues/43758) @[guo-shaoge](https://github.com/guo-shaoge)
- 修复一个使用 AES_DECRYPT 表达时,sql 报错 runtime error: index out of range 的问题 [#43086](https://github.com/pingcap/tidb/issues/43086) @[lcwangchao](https://github.com/lcwangchao)
- 修复 show processlist 无法显示子查询时间较长语句的事务的 start ts 的问题。[#40851](https://github.com/pingcap/tidb/issues/40851) @[crazycs520](https://github.com/crazycs520)
- 修复 PD 隔离有可能导致运行的 DDL 阻塞的问题。 [#44014](https://github.com/pingcap/tidb/issues/44014), [#43755](https://github.com/pingcap/tidb/issues/43755), [#44267]https://github.com/pingcap/tidb/issues/44267) @[wjhuang2016](https://github.com/wjhuang2016)
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(dup: release-7.1.0.md > 错误修复> TiDB)- 修复使用 `UNION` 查询联合视图和临时表时 TiDB panic 的问题 [#42563](https://github.com/pingcap/tidb/issues/42563) @[lcwangchao](https://github.com/lcwangchao)
- 修复放置规则在分区表下的一些行为,使得删除的分区放置规则被正确设置以及回收 [#44116](https://github.com/pingcap/tidb/issues/44116) @[lcwangchao](https://github.com/lcwangchao)
- 修复了在 TRUNCATE 分区表的某个分区时可能造成分区的放置规则失效的问题 [#44031](https://github.com/pingcap/tidb/issues/44031) @[lcwangchao](https://github.com/lcwangchao)
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(dup: release-7.1.0.md > 错误修复> TiDB)- 修复在重命名表期间 TiCDC 可能丢失部分行变更的问题 [#43338](https://github.com/pingcap/tidb/issues/43338) @[tangenta](https://github.com/tangenta)
- 修复使用 BR 导入表后 DDL 作业历史记录丢失的问题 [#43725](https://github.com/pingcap/tidb/issues/43725) @[tangenta](https://github.com/tangenta)
(dup: release-6.5.2.md > 错误修复> TiDB)- 修复在使用 Cursor Fetch 且在 Execute、Fetch、Close 之间运行其它语句后,Fetch 与 Close 命令可能会返回错误结果或造成 TiDB Panic 的问题 [#40094](https://github.com/pingcap/tidb/issues/40094) @[YangKeao](https://github.com/YangKeao)
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(dup: release-6.6.0.md > 错误修复> TiDB)- 修复了 `JSON_OBJECT` 在某些情况下会报错的问题 [#39806](https://github.com/pingcap/tidb/issues/39806) @[YangKeao](https://github.com/YangKeao)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复 IPv6 环境下的集群无法查询部分系统视图的问题 [#43286](https://github.com/pingcap/tidb/issues/43286) @[Defined2014](https://github.com/Defined2014) ,@[nexustar](https://github.com/nexustar)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复当 PD 成员地址发生变化时,为 `AUTO_INCREMENT` 列分配 ID 会被长时间阻塞的问题 [#42643](https://github.com/pingcap/tidb/issues/42643) @[tiancaiamao](https://github.com/tiancaiamao)
<!--tw:oreoxmt-->
- 修复了放置规则回收时,TiDB 向 PD 发送重复请求,造成 PD 侧大量 "full config reset" 日志打印的问题 [#33069](https://github.com/pingcap/tidb/issues/33069) @[tiancaiamao](https://github.com/tiancaiamao)
(dup: release-6.6.0.md > 错误修复> TiDB)- 修复了 `SHOW PRIVILEGES` 命令显示的权限列表不完整的问题 [#40591](https://github.com/pingcap/tidb/issues/40591) @[CbcWestwolf](https://github.com/CbcWestwolf)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复 `ADMIN SHOW DDL JOBS LIMIT` 返回错误结果的问题 [#42298](https://github.com/pingcap/tidb/issues/42298) @[CbcWestwolf](https://github.com/CbcWestwolf)
- 修复在开启密码强度校验时对 tidb_auth_token 用户进行校验的问题 [#44098](https://github.com/pingcap/tidb/issues/44098) @[CbcWestwolf](https://github.com/CbcWestwolf)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复动态裁剪模式下内连接表时找不到分区的问题 [#43686](https://github.com/pingcap/tidb/issues/43686) @[mjonss](https://github.com/mjonss)
- 修复了在分区表上执行 modify column 时输出 truncate data 相关 warning 的问题。[#41118](https://github.com/pingcap/tidb/issues/41118) @[mjonss](https://github.com/mjonss)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复 IPv6 环境下显示错误的 TiDB 地址的问题 [#43260](https://github.com/pingcap/tidb/issues/43260) @[nexustar](https://github.com/nexustar)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复在谓词下推的情况下 CTE 结果错误的问题 [#43645](https://github.com/pingcap/tidb/issues/43645) @[winoros](https://github.com/winoros)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复动态裁剪模式下内连接表时找不到分区的问题 [#43686](https://github.com/pingcap/tidb/issues/43686) @[mjonss](https://github.com/mjonss) @[AilinKid](https://github.com/AilinKid)
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- 修复了 CTE 被用在 non-correlated 子查询时可能出现错误结果的问题。[#44051](https://github.com/pingcap/tidb/issues/44051) @[winoros](https://github.com/winoros)
- 修复了 join reorder 可能会造成 outer join 结果错误的问题。[#44314](https://github.com/pingcap/tidb/issues/44314) @[AilinKid](https://github.com/AilinKid)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复在一些极端情况下,悲观事务的第一条语句发生重试时,对该事务进行 resolve lock 可能影响事务正确性的问题 [#42937](https://github.com/pingcap/tidb/issues/42937) @[MyonKeminta](https://github.com/MyonKeminta)
(dup: release-7.1.0.md > 错误修复> TiDB)- 修复在一些罕见的情况下,悲观事务的残留悲观锁在 GC resolve lock 时可能影响数据正确性的问题 [#43243](https://github.com/pingcap/tidb/issues/43243) @[MyonKeminta](https://github.com/MyonKeminta)
(dup: release-6.5.1.md > 错误修复> TiDB)- 修复了 `batch cop` 在执行过程中的 scan detail 信息不准确的问题 [#41582](https://github.com/pingcap/tidb/issues/41582) @[you06](https://github.com/you06)
- 为 stale-read 增加了命中和流量的指标。 [#43325](https://github.com/pingcap/tidb/issues/43325) @[you06](https://github.com/you06)
- 修复了在同时使用 stale-read 和 prepare 语句时无法读取到数据更新的问题。 [#43044](https://github.com/pingcap/tidb/issues/43044) @[you06](https://github.com/you06)
- 修复了在 load data 语句中可能误报 assertion 错误的问题。[#43849](https://github.com/pingcap/tidb/issues/43849) @[you06](https://github.com/you06)
- 修复了使用 stale-read 时,coprocessor 在遇到 data-is-not-ready 的情况下不能 fallback 到 leader 的问题。 [#43365](https://github.com/pingcap/tidb/issues/43365) @[you06](https://github.com/you06)
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+ TiKV

- note 1
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+ PD

- note 1

+ TiFlash

<!--tw:hfxsd-->
- 修复一个分区表查询报错的问题 [#7519](https://github.com/pingcap/tiflash/issues/7519) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger)
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- 修复在表字段同时存在 TIMESTAMP 或者 TIME 类型和 GENERATED 类型情况下,查询 TiFlash 可能会报错的问题 [#7468](https://github.com/pingcap/tiflash/issues/7468) @[Lloyd-Pottiger](https://github.com/Lloyd-Pottiger)
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(dup: release-7.1.0.md > 错误修复> TiFlash)- 修复大的更新事务可能会导致 TiFlash 反复报错重启的问题 [#7316](https://github.com/pingcap/tiflash/issues/7316) @[JaySon-Huang](https://github.com/JaySon-Huang)
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- 修复一个 insert select 语句从 tiflash 读取数据时,sql 报错 Truncate error cast decimal as decimal 的问题 [#7348](https://github.com/pingcap/tiflash/issues/7348) @[windtalker](https://github.com/windtalker)
- 修复查询在 Join build 侧数据非常大,且包含许多小型字符串类型列时,可能会使用比实际需要更大的内存的问题。 [#7416](https://github.com/pingcap/tiflash/issues/7416) @[yibin87](https://github.com/yibin87)
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+ Tools

+ Backup & Restore (BR)

- 修复备份失败时 "resolve lock timeout" 掩盖真正错误的问题 [#43236](https://github.com/pingcap/tidb/issues/43236) @[YuJuncen](https://github.com/YuJuncen)
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+ TiCDC
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<!--tw:hfxsd-->
- 修复在表数量特别多场景下可能出现的 OOM 问题。[#7872](https://github.com/pingcap/tiflow/issues/7872)
- 优化 TiCDC 对 DDL 的处理方式,使 DDL 不阻塞住其他无关的 DML event 的使用,同时减少内存的使用。[#8106](https://github.com/pingcap/tiflow/issues/8106)
- 修复在表数量特别多(10k)场景下可能出现的 Panic 问题。[#8863](https://github.com/pingcap/tiflow/issues/8863)
- 修复TiCDC 在上游 TiDB 发生 OOM 时卡住的问题。[#8561](https://github.com/pingcap/tiflow/issues/8561)
- 修复 PD 出现网络隔离、PD owner 节点重启等故障时 CDC 卡住问题。[#8808](https://github.com/pingcap/tiflow/issues/8808)[#8812](https://github.com/pingcap/tiflow/issues/8812)[#8877](https://github.com/pingcap/tiflow/issues/8877)
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(dup: release-7.1.0.md > 错误修复> Tools> TiCDC)- 修复 TiCDC 的时区设置问题 [#8798](https://github.com/pingcap/tiflow/issues/8798) @[hi-rustin](https://github.com/hi-rustin)
(dup: release-7.1.0.md > 错误修复> Tools> TiCDC)- 修复上游 TiKV 节点 crash 时 checkpoint lag 上升的问题 [#8858](https://github.com/pingcap/tiflow/issues/8858) @[hicqu](https://github.com/hicqu)
(dup: release-7.1.0.md > 改进提升> Tools> TiCDC)- 优化同步数据到对象存储的场景下发生 DDL 事件时的目录结构 [#8890](https://github.com/pingcap/tiflow/issues/8890) @[CharlesCheung96](https://github.com/CharlesCheung96)
(dup: release-7.1.0.md > 改进提升> Tools> TiCDC)- 支持同步到 Kafka-on-Pulsar 下游 [#8892](https://github.com/pingcap/tiflow/issues/8892) @[hi-rustin](https://github.com/hi-rustin)
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<!--tw:qiancai-->
- 修复同步到 mysql 场景下,上游执行 flashback 命令出现的问题 [#8040](https://github.com/pingcap/tiflow/issues/8040)
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(dup: release-7.1.0.md > 错误修复> Tools> TiCDC)- 修复当同步数据到对象存储时上游的 `EXCHANGE PARTITION` 操作没有正常同步到下游的问题 [#8914](https://github.com/pingcap/tiflow/issues/8914) @[CharlesCheung96](https://github.com/CharlesCheung96)
(dup: release-7.1.0.md > 改进提升> Tools> TiCDC)- 增加一个配置项 `insecure-skip-verify`,控制在同步数据到 Kafka 的场景下启用 TLS 时是否设置认证算法 [#8867](https://github.com/pingcap/tiflow/issues/8867) @[hi-rustin](https://github.com/hi-rustin)
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(dup: release-7.1.0.md > 错误修复> Tools> TiCDC)- 修复在某些特殊场景下 sorter 组件内存使用过多导致 OOM 的问题 [#8974](https://github.com/pingcap/tiflow/issues/8974) @[hicqu](https://github.com/hicqu)
(dup: release-7.1.0.md > # 稳定性)* TiCDC 优化 DDL 同步操作 [#8686](https://github.com/pingcap/tiflow/issues/8686) @[hi-rustin](https://github.com/hi-rustin)
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- 修复下游时 Kafka 场景下,TiCDC 查询下游元信息频率过高导致下游负载过大的问题。[#8957](https://github.com/pingcap/tiflow/issues/8957)[#8959](https://github.com/pingcap/tiflow/issues/8959)
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- 修复同步 Kafka 消息过大出错时,在 Log 中记录了消息体的问题 [#9031](https://github.com/pingcap/tiflow/issues/9031)
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(dup: release-7.1.0.md > 改进提升> Tools> TiCDC)- 优化 TiCDC 在同步任务失败时对上游 GC TLS 的设置方法 [#8403](https://github.com/pingcap/tiflow/issues/8403) @[charleszheng44](https://github.com/charleszheng44)
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(dup: release-7.1.0.md > 错误修复> Tools> TiCDC)- 修复下游 Kafka 滚动重启时 TiCDC 节点发生 panic 的问题 [#9023](https://github.com/pingcap/tiflow/issues/9023) @[asddongmen](https://github.com/asddongmen)
- 修复同步到云对象存储时,在下游 DDL 对应的 json 文件中没有记录表中字段的默认值问题. [#9066](https://github.com/pingcap/tiflow/issues/9066)
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- 优化同步到 Kafka 场景下,支持 oauth 协议验证方式. [#8865](https://github.com/pingcap/tiflow/issues/8865)
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- 优化采用 Avro 或 CSV 协议同步时,对 update 的处理方式,即拆分为 delete + insert ,用户可以获取 old value。[#9086](https://github.com/pingcap/tiflow/issues/9086)
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+ TiDB Data Migration (DM)

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+ TiDB Lightning

(dup: release-7.1.0.md > 错误修复> Tools> TiDB Lightning)- 修复宽表导入时可能出现 OOM 的问题 [#43728](https://github.com/pingcap/tidb/issues/43728) @[D3Hunter](https://github.com/D3Hunter)
(dup: release-7.1.0.md > 错误修复> Tools> TiDB Lightning)- 修复大数据量导入时报 `write to tikv with no leader returned` 错误的问题 [#43055](https://github.com/pingcap/tidb/issues/43055) @[lance6716](https://github.com/lance6716)
(dup: release-6.6.0.md > 错误修复> Tools> TiDB Lightning)- 修复当数据文件中存在未闭合的 delimiter 时可能 OOM 的问题 [#40400](https://github.com/pingcap/tidb/issues/40400) @[buchuitoudegou](https://github.com/buchuitoudegou) @[lance6716](https://github.com/lance6716)
(dup: release-7.1.0.md > 改进提升> Tools> TiDB Lightning)- 在导入数据期间遇到 `unknown RPC` 错误时,增加了重试机制 [#43291](https://github.com/pingcap/tidb/issues/43291) @[D3Hunter](https://github.com/D3Hunter)
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+ Dumpling

- note 1
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+ TiDB Binlog
<!--tw:qiancai-->
- 优化 table info 获取方式,降低 drainer 初始化时间和内存占用 [#1137](https://github.com/pingcap/tidb-binlog/issues/1137) @[lichunzhu](https://github.com/lichunzhu)
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- 修复遇到状态为 CANCELED 的 DDL 时报错的问题 [#1228](https://github.com/pingcap/tidb-binlog/issues/1228) @[okJiang](https://github.com/okJiang)
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