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title: TiDB 5.4.3 Release Notes | ||
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# TiDB 5.4.3 Release Notes | ||
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发版日期:2022 年 10 月 13 日 | ||
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TiDB 版本:5.4.3 | ||
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## 提升改进 | ||
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+ TiKV | ||
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- 支持将 RocksDB write stall 参数设置为比 flow control 流控阈值更小的值 [#13467](https://github.com/tikv/tikv/issues/13467) | ||
- 支持配置 `unreachable_backoff` 避免 Raftstore 发现某个 Peer 无法连接时广播过多消息 [#13054](https://github.com/tikv/tikv/issues/13054) | ||
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+ Tools | ||
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+ TiDB Lightning | ||
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- 优化 Scatter Region 为批量模式,提升 Scatter Region 过程的稳定性 [#33618](https://github.com/pingcap/tidb/issues/33618) | ||
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+ TiCDC | ||
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- 优化了多 Region 场景下,runtime 上下文切换带来过多性能开销的问题 [#5610](https://github.com/pingcap/tiflow/issues/5610) | ||
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## Bug 修复 | ||
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+ TiDB | ||
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- 修复 `SHOW CREATE PLACEMENT POLICY` 输出结果不正确的问题 [#37526](https://github.com/pingcap/tidb/issues/37526) | ||
- 修复集群的 PD 节点被替换后一些 DDL 语句会卡住一段时间的问题 [#33908](https://github.com/pingcap/tidb/issues/33908) | ||
- 修复 `KILL TIDB` 在空闲连接上无法立即生效的问题 [#24031](https://github.com/pingcap/tidb/issues/24031) | ||
- 修复在 TiDB 上查询 `INFORMATION_SCHEMA.COLUMNS` 系统表得到的 `DATA_TYPE` 和 `COLUMN_TYPE` 列结果不正确的问题 [#36496](https://github.com/pingcap/tidb/issues/36496) | ||
- 修复在开启 TiDB Binlog 时,TiDB 执行 `ALTER SEQUENCE` 会产生错误的元信息版本号,进而导致 Drainer 报错退出的问题 [#36276](https://github.com/pingcap/tidb/issues/36276) | ||
- 修复 `UNION` 运算符可能会非预期地返回空结果的问题 [#36903](https://github.com/pingcap/tidb/issues/36903) | ||
- 修复在 TiFlash 中为分区表开启动态模式时结果出错的问题 [#37254](https://github.com/pingcap/tidb/issues/37254) | ||
- 修复 `INL_HASH_JOIN` 和 `LIMIT` 一起使用时可能会卡住的问题 [#35638](https://github.com/pingcap/tidb/issues/35638) | ||
- 修复执行 `SHOW WARNINGS` 时可能会报 `invalid memory address or nil pointer dereference` 的问题 [#31569](https://github.com/pingcap/tidb/issues/31569) | ||
- 修复在读已提交隔离级别 (RC isolation level) 执行 Stale Read 报 `invalid transaction` 错误的问题 [#30872](https://github.com/pingcap/tidb/issues/30872) | ||
- 修复带 DML 算子的 `EXPLAIN ANALYZE` 语句可能在事务提交完成前返回结果的问题 [#37373](https://github.com/pingcap/tidb/issues/37373) | ||
- 修复开启 TiDB Binlog 后插入重复数据导致 data and columnID count not match 错误的问题 [#33608](https://github.com/pingcap/tidb/issues/33608) | ||
- 修复 Static Partition Prune 模式下带聚合条件的 SQL 语句在表为空时结果错误的问题 [#35295](https://github.com/pingcap/tidb/issues/35295) | ||
- 修复 TiDB 在执行 `UPDATE` 语句时可能会 panic 的问题 [#32311](https://github.com/pingcap/tidb/issues/32311) | ||
- 修复 `UnionScan` 无法保序导致的查询结果不正确的问题 [#33175](https://github.com/pingcap/tidb/issues/33175) | ||
- 修复在某些情况下 `UPDATE` 语句错误地消除了 projection 导致 `Can't find column` 报错的问题 [#37568](https://github.com/pingcap/tidb/issues/37568) | ||
- 修复某些情况下分区表无法充分利用索引来扫描数据的问题 [#33966](https://github.com/pingcap/tidb/issues/33966) | ||
- 修复某些情况下,`EXECUTE` 语句可能抛出非预期异常的问题 [#37187](https://github.com/pingcap/tidb/issues/37187) | ||
- 修复开启 Prepared Plan Cache 后,使用 `BIT` 类型的索引可能会导致查询结果错误的问题 [#33067](https://github.com/pingcap/tidb/issues/33067) | ||
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+ TiKV | ||
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- 修复了 PD leader 发生切换或重启 PD 后,在集群中执行 SQL 语句会出现持续报错的问题 [#12934](https://github.com/tikv/tikv/issues/12934) | ||
- 问题原因:该问题是由于 TiKV 存在 bug,TiKV 向 PD client 发送心跳请求失败后不会重试,只能等待与 PD client 重连。这样,故障 TiKV 节点上的 Region 的信息会逐步变旧,使得 TiDB 无法获取最新的 Region 信息,导致 SQL 执行出错。 | ||
- 影响版本:v5.3.2 和 v5.4.2。目前该问题已在 v5.3.3 和 v5.4.3 上修复。如果你使用 v5.4.2 的 TiDB 集群,可以升级至 v5.4.3。 | ||
- 规避方法:除升级外,你还可以重启无法向 PD 发送 Region 心跳的 TiKV 节点,直至不再有待发送的 Region 心跳为止。 | ||
- 修复 Web 身份提供程序 (web identity provider) 报错并失效后,自动恢复为默认提供程序 (default provider) 时出现权限拒绝的问题 [#13122](https://github.com/tikv/tikv/issues/13122) | ||
- 修复 PD 客户端可能会出现死锁的问题 [#13191](https://github.com/tikv/tikv/issues/13191) | ||
- 修复 Raftstore 线程繁忙时,可能会出现 Region 重叠的问题 [#13160](https://github.com/tikv/tikv/issues/13160) | ||
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+ PD | ||
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- 修复 PD 无法正确处理 dashboard 代理请求的问题 [#5321](https://github.com/tikv/pd/issues/5321) | ||
- 修复已清除的 `tombstone store` 信息在切换 PD leader 后再次出现的问题 [#4941](https://github.com/tikv/pd/issues/4941) | ||
- 修复 PD 可能没创建 TiFlash Learner 副本的问题 [#5401](https://github.com/tikv/pd/issues/5401) | ||
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+ TiFlash | ||
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- 修复 `format` 函数可能会报 `Data truncated` 错误的问题 [#4891](https://github.com/pingcap/tiflash/issues/4891) | ||
- 修复并行聚合出错时可能导致 TiFlash crash 的问题 [#5356](https://github.com/pingcap/tiflash/issues/5356) | ||
- 修复使用包含 `NULL` 值的列创建主键时导致崩溃的问题 [#5859](https://github.com/pingcap/tiflash/issues/5859) | ||
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+ Tools | ||
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+ TiDB Lightning | ||
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- 修复 `BIGINT` 类型自增列可能越界的问题 [#27397](https://github.com/pingcap/tidb/issues/27937) | ||
- 修复极端情况下去重可能会导致 TiDB Lightning panic 的问题 [#34163](https://github.com/pingcap/tidb/issues/34163) | ||
- 修复 TiDB Lightning 不支持 Parquet 文件中以斜线 (`/`)、数字、非 ASCII 字符开头的特殊列名的问题 [#36980](https://github.com/pingcap/tidb/issues/36980) | ||
- 修复了使用 IPv6 host 时无法连接到 TiDB 的问题 [#35880](https://github.com/pingcap/tidb/issues/35880) | ||
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+ TiDB Data Migration (DM) | ||
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- 修复 DM Worker 获取 DB 连接时可能卡住的问题 [#3733](https://github.com/pingcap/tiflow/issues/3733) | ||
- 修复 DM 报错 `Specified key was too long` 的问题 [#5315](https://github.com/pingcap/tiflow/issues/5315) | ||
- 修复数据同步过程中,latin1 字符集数据可能损坏的问题 [#7028](https://github.com/pingcap/tiflow/issues/7028) | ||
- 修复 DM IPv6 支持问题 [#6249](https://github.com/pingcap/tiflow/issues/6249) | ||
- 修复 `query-status` 内可能存在 data race 的问题 [#4811](https://github.com/pingcap/tiflow/issues/4811) | ||
- 修复 relay 报错时可能导致 goroutine 泄露问题 [#6193](https://github.com/pingcap/tiflow/issues/6193) | ||
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+ TiCDC | ||
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- 修复 `enable-old-value = false` 时可能出现的 cdc panic 问题 [#6198](https://github.com/pingcap/tiflow/issues/6198) | ||
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+ Backup & Restore (BR) | ||
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- 修复当外部存储的鉴权 Key 中存在某些特殊符号时,会导致备份恢复失败的问题 [#37469](https://github.com/pingcap/tidb/issues/37469) | ||
- 修复在恢复时配置过高的 concurrency 会导致 Region 不均衡的问题 [#37549](https://github.com/pingcap/tidb/issues/37549) | ||
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+ Dumpling | ||
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- 修复 GetDSN 方法不支持 IPv6 的问题 [#36112](https://github.com/pingcap/tidb/issues/36112) |
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