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releases: add tidb 5.0.6 release notes #8041

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releases: add tidb 5.0.6 release notes
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1 change: 1 addition & 0 deletions TOC.md
Original file line number Diff line number Diff line change
Expand Up @@ -589,6 +589,7 @@
- [5.1.1](/releases/release-5.1.1.md)
- [5.1.0](/releases/release-5.1.0.md)
- v5.0
- [5.0.6](/releases/release-5.0.6.md)
- [5.0.5](/releases/release-5.0.5.md)
- [5.0.4](/releases/release-5.0.4.md)
- [5.0.3](/releases/release-5.0.3.md)
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166 changes: 166 additions & 0 deletions releases/release-5.0.6.md
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---
title: TiDB 5.0.6 Release Notes
---

# TiDB 5.0.6 Release Notes

发版日期:2021 年 12 月 28 日
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TiDB 版本:5.0.6

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## 兼容性更改

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+ Tools

+ TiCDC

- cdc server 命令错误输出从标准输出改成标准错误. [#3133](https://github.com/pingcap/tiflow/issues/3133)
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## 提升改进
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+ TiDB

(dup) - 修复乐观事务冲突可能导致事务相互阻塞的问题 [#11148](https://github.com/tikv/tikv/issues/11148)
(dup) - 修复运行 MPP 查询时出现 `invalid cop task execution summaries length` 相关日志的问题 [#1791](https://github.com/pingcap/tics/issues/1791)
(dup) - 当 coprocessor 遇到锁时,在调试日志中显示受影响的 SQL 语句帮助诊断问题 [#27718](https://github.com/pingcap/tidb/issues/27718)

+ TiKV

- 将插入 SST 文件时的校验操作移动到了 import 线程池以提高 SST 文件插入速度. [#11239](https://github.com/tikv/tikv/issues/11239)
- 为 raft 日志回收模块增加了更多监控以定位问题. [#11374](https://github.com/tikv/tikv/issues/11374)
- 折叠了部分 Storage 相关的不常用监控 [#11681](https://github.com/tikv/tikv/issues/11681)

+ PD

(dup) - 优化调度器退出的速度 [#4146](https://github.com/tikv/pd/issues/4146)
- 通过允许空 Region 调度和修复配置的方式使 scatter-range-scheduler运行更好 [#4497](https://github.com/tikv/pd/issues/4497)
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+ Tools

+ TiCDC

(dup) - 优化 TiKV 重新加载时的速率限制控制,缓解 changefeed 初始化时 gPRC 的拥堵问题 [#3110](https://github.com/pingcap/tiflow/issues/3110)
(dup) - 修复当扫描存量数据耗时过长时,可能由于 TiKV 进行 GC 而导致存量数据扫描失败的问题 [#2470](https://github.com/pingcap/tiflow/issues/2470)
(dup) - 修复当发生 ErrGCTTLExceeded 错误时,changefeed 不快速失败的问题 [#3111](https://github.com/pingcap/tiflow/issues/3111)
(dup) - 为 EtcdWorker 添加 tick 频率限制,防止 PD 的 etcd 写入次数过于频繁影响 PD 服务 [#3112](https://github.com/pingcap/tiflow/issues/3112)
- 支持消息 Batch 操作减少 EtcdWorker tick [3112](https://github.com/pingcap/tiflow/issues/3112)
(dup) - 修复在容器环境中 OOM 的问题 [#1798](https://github.com/pingcap/tiflow/issues/1798)
- Kafka sink 模块支持默认的元数据获取超时时间 config.Metadata.Timeout [#3352](https://github.com/pingcap/tiflow/issues/3352)
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- Kafka sink 模块设置 `MaxMessageBytes` 默认值为 1MB [#3081](https://github.com/pingcap/tiflow/issues/3081)
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- 增加更多 Promethous 和 grafana 监控告警参数,包括 "no owner alert" [#4054](https://github.com/pingcap/tiflow/issues/4054), "mounter row", "table sink total row", "buffer sink total row" [#1606](https://github.com/pingcap/tiflow/issue/1606)
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Suggested change
- 支持消息 Batch 操作减少 EtcdWorker tick [3112](https://github.com/pingcap/tiflow/issues/3112)
(dup) - 修复在容器环境中 OOM 的问题 [#1798](https://github.com/pingcap/tiflow/issues/1798)
- Kafka sink 模块支持默认的元数据获取超时时间 config.Metadata.Timeout [#3352](https://github.com/pingcap/tiflow/issues/3352)
- Kafka sink 模块设置 `MaxMessageBytes` 默认值为 1MB [#3081](https://github.com/pingcap/tiflow/issues/3081)
- 增加更多 Promethous 和 grafana 监控告警参数,包括 "no owner alert" [#4054](https://github.com/pingcap/tiflow/issues/4054), "mounter row", "table sink total row", "buffer sink total row" [#1606](https://github.com/pingcap/tiflow/issue/1606)
- 为 EtcdWorker 添加 tick 频率限制,防止 PD 的 etcd 写入次数过于频繁影响 PD 服务 [#3112](https://github.com/pingcap/tiflow/issues/3112)
(dup) - 修复在容器环境中 OOM 的问题 [#1798](https://github.com/pingcap/tiflow/issues/1798)
- Kafka sink 模块支持默认的元数据获取超时时间 `config.Metadata.Timeout` [#3352](https://github.com/pingcap/tiflow/issues/3352)
- 增加更多 Promethous 和 Grafana 监控告警参数,包括 "no owner alert"、"mounter row"、"table sink total row"、"buffer sink total row" [#4054](https://github.com/pingcap/tiflow/issues/4054) [#1606](https://github.com/pingcap/tiflow/issue/1606)

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+ (Backup & Restore) BR
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- 支持 pd request 和 TiKV IO 超时错误重试 [#27787](https://github.com/pingcap/tidb/issues/27787)
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## Bug 修复

+ TiDB

- 修复 DML 和 DDL 语句并发执行时可能发生 panic 的问题 [#30940](https://github.com/pingcap/tidb/issues/30940)
(dup) - 修复 `grant` 和 `revoke` 操作在授予和撤销全局权限时,报 `privilege check fail` 错误的问题 [#29675](https://github.com/pingcap/tidb/issues/29675)
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- 修复在某些场景下执行 `ALTER TABLE.. ADD INDEX` 语句时 TiDB panic 的问题 [#27687](https://github.com/pingcap/tidb/issues/27687)
- 修复配置项 `enforce-mpp` 在 v5.0.4 中不生效的问题 [#29252](https://github.com/pingcap/tidb/issues/29252)
(dup) - 修复当 `CASE WHEN` 函数和 `ENUM` 类型一起使用时的崩溃问题 [#29357](https://github.com/pingcap/tidb/issues/29357)
(dup) - 修复 `microsecond` 函数的向量化表达式版本结果不正确的问题 [#29244](https://github.com/pingcap/tidb/issues/29244)
(dup) - 修复 `auto analyze` 输出的日志信息不完整的问题 [#29188](https://github.com/pingcap/tidb/issues/29188)
(dup) - 修复 `hour` 函数在向量化表达式中执行结果错误的问题 [#28643](https://github.com/pingcap/tidb/issues/28643)
(dup) - 修复当不支持的 `cast` 被下推到 TiFlash 时出现的非预期错误,例如 `tidb_cast to Int32 is not supported` [#23907](https://github.com/pingcap/tidb/issues/23907)
(dup) - 修复 MPP 节点的可用性检测在某些边界场景中无法工作的问题 [#3118](https://github.com/pingcap/tics/issues/3118)
(dup) - 修复分配 `MPP task ID` 时出现 `DATA RACE` 的问题 [#27952](https://github.com/pingcap/tidb/issues/27952)
(dup) - 修复删除空的 `dual table` 后 MPP 查询出现 `index out of range` 报错的问题 [#28250](https://github.com/pingcap/tidb/issues/28250)
- 修复并行插入无效日期类型值时,TiDB panic 的问题 [#25393](https://github.com/pingcap/tidb/issues/25393)
- 修复在 MPP 模式下查询时,报 `can not found column in Schema column` 错误的问题 [#30980](https://github.com/pingcap/tidb/issues/30980)
(dup) - 修复 TiDB 在 TiFlash 关闭时可能出现 panic 的问题 [#28096](https://github.com/pingcap/tidb/issues/28096)
- 修复优化器在进行 join reorder 优化时,报 `index out of range` 错误的问题 [#24095](https://github.com/pingcap/tidb/issues/24095)
(dup) - 修复当 `ENUM` 类型作为 `IF` 或 `CASE WHEN` 等控制函数的参数时,返回结果不正确的问题 [#23114](https://github.com/pingcap/tidb/issues/23114)
- 修复 `CONCAT(IFNULL(TIME(3))` 计算结果出错的问题 [#29498](https://github.com/pingcap/tidb/issues/29498)
- 修复当 `GREATEST` 和 `LEAST` 函数传入无符号整型值时,计算结果出错的问题 [#30101](https://github.com/pingcap/tidb/issues/30101)
- 修复当 SQL 中存在 json 类型列 与 char 类型列 join 时,SQL 出错的问题 [#29401](https://github.com/pingcap/tidb/issues/29401)
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- 修复 update 语句未更新索引处理优化,可能导致数据索引不一致的问题 [#30410](https://github.com/pingcap/tidb/issues/30410)
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- 修复窗口函数在使用事务时,计算结果与不使用事务不一样的问题 [#29947](https://github.com/pingcap/tidb/issues/29947)
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- 修复 SQL 形如`cast(integer as char) union string` 计算结果出错的问题 [#29513](https://github.com/pingcap/tidb/issues/29513)
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(dup) - 修复将 `Decimal` 转为 `String` 时长度信息错误的问题 [#29417](https://github.com/pingcap/tidb/issues/29417)
- 修复使用 NATURAL JOIN 时,报错 `Column 'col_name' in field list is ambiguous` 的问题 [#25041](https://github.com/pingcap/tidb/issues/25041)
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(dup) - 修复由于 `tidb_enable_vectorized_expression` 设置的值不同(`on` 或 `off`)导致 `GREATEST` 函数返回结果不一致的问题 [#29434](https://github.com/pingcap/tidb/issues/29434)
(dup) - 修复在某些情况下 Planner 可能缓存无效 `join` 计划的问题 [#28087](https://github.com/pingcap/tidb/issues/28087)
- 修复 SQL 在 join 上计算聚合函数时,报错 `index out of range [1] with length 1` 的问题 [#1978](https://github.com/pingcap/tics/issues/1978)
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+ TiKV

- 修复某个 TiKV 节点停机导致 Resolve Timestamp 进度落后的问题 [#11351](https://github.com/tikv/tikv/issues/11351)
(dup) - 修复 Raft client 中 batch 消息过大的问题 [#9714](https://github.com/tikv/tikv/issues/9714)
(dup) - 修复在极端情况下同时进行 Region Merge、ConfChange 和 Snapshot 时,TiKV 会出现 Panic 的问题 [#11475](https://github.com/tikv/tikv/issues/11475)
- 修复逆序范围查询时没有正确读到内存锁的问题 [#11440](https://github.com/tikv/tikv/issues/11440)
(dup) - 修复 Decimal 除法计算的结果为 0 时符号为负的问题 [#29586](https://github.com/pingcap/tidb/issues/29586)
(dup) - 修复历史版本回收任务堆积导致的内存耗尽问题 [#11410](https://github.com/tikv/tikv/issues/11410)
(dup) - 修复 TiKV 监控项中实例级别 gRPC 的平均延迟时间不准确的问题 [#11299](https://github.com/tikv/tikv/issues/11299)
- 修复 label 泄漏导致 OOM 的问题. [#11195](https://github.com/tikv/tikv/issues/11195)
(dup) - 修复在缺失下游数据库时出现 TiCDC Panic 的问题 [#11123](https://github.com/tikv/tikv/issues/11123)
(dup) - 修复因 Congest 错误而导致的 CDC 频繁增加 scan 重试的问题 [#11082](https://github.com/tikv/tikv/issues/11082)
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(dup) - 修复因 channel 打满而导致的 Raft 断连的问题 [#11047](https://github.com/tikv/tikv/issues/11047)
- 修复 Lightning 导入数据期间 TiKV 因为文件不存在而宕机的问题 [#10438](https://github.com/tikv/tikv/issues/10438)
(dup) - 修复由于无法在 `Max`/`Min` 函数中正确识别 Int64 是否为有符号整数,导致 `Max`/`Min` 函数的计算结果不正确的问题 [#10158](https://github.com/tikv/tikv/issues/10158)
- 修复从副本从主副本获取快照后未能正确修改元信息导致 TiKV 节点宕机的问题。 [#10225](https://github.com/tikv/tikv/issues/10225)
- 修复 backup 线程池泄漏的问题 [#10287](https://github.com/tikv/tikv/issues/10287)
- 修复将不合法字符串转化为浮点数的问题 [#23322](https://github.com/pingcap/tidb/issues/23322)
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+ PD

(dup) - 修复 TiKV 节点缩容后可能导致 Panic 的问题 [#4344](https://github.com/tikv/pd/issues/4344)
(dup) - 修复 Operator 被 Down Store 阻塞的问题 [#3353](https://github.com/tikv/pd/issues/3353)
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(dup) - 修复因 Region syncer 卡住而导致 leader 选举慢的问题 [#3936](https://github.com/tikv/pd/issues/3936)
(dup) - 允许 Evict Leader 调度器调度拥有不健康副本的 Region [#4093](https://github.com/tikv/pd/issues/4093)
- 修复 Down Store 的 Remove Peer 速度受限问题[#4090](https://github.com/tikv/pd/issues/4090)
- 修复当 Region 心跳低于60秒导致热点 Cache 不能清空的问题 [#4390](https://github.com/tikv/pd/issues/4390)
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+ TiFlash

- 修复当在扩大整数类型主键的列类型之后,可能会导致数据不一致的问题。
- 修复在某些平台 TiFlash 由于找不到 "libnsl.so" 而无法启动的问题,比如某些 ARM 平台
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- 修复 TiFlash 的 Store size 统计信息与实际容量不一致的问题
- 修复 TiFlash 由于 "Cannot open file" 错误而导致的进程失败
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- 修复当查询被取消时,TiFlash 偶发的崩溃问题。
- 修复查询报错 "3rd arguments of function substringUTF8 must be constants"
- 提高了支持的查询 SQL 中表达式的层级数量,避免比如过多 "OR" 条件导致查询报错
- 修复当查询带了 where <string> 会变成 int 类型的导致查询结构出错的问题。
- 修复在 TiFlash 与 TiDB/TiKV 之间,由于 CastStringAsDecimal 行为不一致的问题。
- 修复由于 "different types: expected Nullable(Int64), got Int64" 错误而导致查询报错的问题
- 修复由于 "Unexpected type of column: Nullable(Nothing)" 错误而导致的查询报错
- 修复 Decimal 类型比较时,可能导致数据溢出并导致查询失败的问题
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+ Tools

+ TiCDC

(dup) - 修复当开启 `force-replicate` 时,可能某些没有有效索引的分区表被忽略的问题 [#2834](https://github.com/pingcap/tiflow/issues/2834)
- 修复 cdc cli 接收到非预期参数时截断用户参数,导致用户输入数据丢失问题 [#2303](https://github.com/pingcap/tiflow/issues/2303)
- 修复 cdc 调度逻辑过早调用表问题 [#2625](https://github.com/pingcap/tiflow/issues/2625)
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(dup) - 修复当写入 Kafka 消息发生错误时,TiCDC 同步任务推进可能停滞的问题 [#2978](https://github.com/pingcap/tiflow/issues/2978)
- 修复 MQ sink 模块不支持非 binary json 类型列解析 [#2758](https://github.com/pingcap/tiflow/issues/2758)
(dup) - 将 Kafka Sink `max-message-bytes` 的默认值改为 1 MB,防止 TiCDC 发送过大消息到 Kafka 集群 [#2962](https://github.com/pingcap/tiflow/issues/2962)
(dup) - 修复当上游 TiDB 实例意外退出时,TiCDC 同步任务推进可能停滞的问题 [#3061](https://github.com/pingcap/tiflow/issues/3061)
(dup) - 修复当 TiKV 向同一 Region 发送重复请求时,TiCDC 进程 Panic 的问题 [#2386](https://github.com/pingcap/tiflow/issues/2386)
(dup) - 修复在多个 TiKV 崩溃或强制重启时可能遇到复制中断的问题 [#3288](https://github.com/pingcap/tiflow/issues/3288)
(dup) - 修复监控 checkpoint lag 出现负值的问题 [#3010](https://github.com/pingcap/tiflow/issues/3010)
- 修复 MySQL sink 模块出现死锁时告警过于频繁问题 [#2706](https://github.com/pingcap/tiflow/issues/2706)
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- 修复 Avro sink 模块不支持 json type 列类型解析 [#3624](https://github.com/pingcap/tiflow/issues/3624)
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- 修复 TiKV 重启时 cdc 读取到错误的元数据快照问题 [#2603](https://github.com/pingcap/tiflow/issues/2603)
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(dup) - 修复执行 DDL 后的内存泄漏的问题 [#3174](https://github.com/pingcap/tiflow/issues/3174)
- 修复 Canal 和 Maxwell 协议没有自动开启 old value 选项问题 [#3676](https://github.com/pingcap/tiflow/issues/3676)
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- 修复 cdc server 在一些 RHEL 系统(6.8, 6.9 etc)上运行出现的时区错误问题. [#3584](https://github.com/pingcap/tiflow/issues/3584)
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- 修复 Kafka sink 模块监控变量 txn_batch_size 不准确问题 [#3431](https://github.com/pingcap/tiflow/issues/3431)
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(dup) - 将 Kafka Sink `partition-num` 的默认值改为 3,使 TiCDC 更加平均地分发消息到各个 Kafka partition [#3337](https://github.com/pingcap/tiflow/issues/3337)
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(dup) - 将 Kafka Sink `partition-num` 的默认值改为 3,使 TiCDC 更加平均地分发消息到各个 Kafka partition [#3337](https://github.com/pingcap/tiflow/issues/3337)
(dup) - 修复 tikv_cdc_min_resolved_ts_no_change_for_1m 监控在没有 changefeed 的情况下持续更新的问题 [#11017](https://github.com/tikv/tikv/issues/11017)
(dup) - 优化 TiKV 重新加载时的速率限制控制,缓解 changefeed 初始化时 gPRC 的拥堵问题 [#3110](https://github.com/pingcap/tiflow/issues/3110)

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+ (Backup & Restore) BR
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(dup) - 增强恢复的鲁棒性 [#27421](https://github.com/pingcap/tidb/issues/27421)
- 修复使用了 expression index 的表使用本地 backend 导入时出现错误问题. [#1404](https://github.com/pingcap/br/issues/1404)
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- 修复 BR 中平均速度不准确的问题 [#1405](https://github.com/pingcap/br/issues/1405)
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+ Dumpling

- 修复 dumping 包含 primary/unique key 表时出现的过慢问题. [#29386](https://github.com/pingcap/tidb/issues/29386)
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1 change: 1 addition & 0 deletions releases/release-notes.md
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Expand Up @@ -27,6 +27,7 @@ TiDB 历史版本发布声明如下:

## 5.0

- [5.0.6](/releases/release-5.0.6.md)
- [5.0.5](/releases/release-5.0.5.md)
- [5.0.4](/releases/release-5.0.4.md)
- [5.0.3](/releases/release-5.0.3.md)
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1 change: 1 addition & 0 deletions releases/release-timeline.md
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Expand Up @@ -9,6 +9,7 @@ summary: 了解 TiDB 的版本发布时间线。

| 版本 | 发布日期 |
| :--- | :--- |
| [5.0.6](/releases/release-5.0.6.md) | 2021-12-28 |
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| [4.0.16](/releases/release-4.0.16.md) | 2021-12-17 |
| [5.1.3](/releases/release-5.1.3.md) | 2021-12-03 |
| [5.0.5](/releases/release-5.0.5.md) | 2021-12-03 |
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