Release 3.21.10.0

Release Notes:

We have released a new version 3.21.06.0.
Firstly, we must thank to the following people for their contributions to our community：@13611582598, @mwhei , @lenovore, @jmbkeyes .

Features:

• [#2866] Supports detach/attach cluster. More Detail,see doc.
• [#2844] Supports default sharding schema[alpha version]. More Detail,see doc.
• [#2845] New flow control: add backend read water level. More Detail,see doc.

Bug-fixes:

• [#11] EPollArrayWrapper.epollWait may cause 100% CPU .
• [#2896] show @@dbInstance command, READ_LOAD and WRITE_LOAD are always displayed as 0.
• [#2747] fakeMySQLVersion does not support MariaDB 10.x, thanks to @lenovore for reporting the bug.
• [#2750] support add/truncate/dop partition , thanks to @13611582598 for reporting the bug.
• [#2611] The problem of optimizing er table, thanks to @jmbkeyes for reporting the bug.
• [#2828] Three tables join, the result may be wrong, thanks to @mwhei for reporting the bug.
• Sometimes complex queries may cause memory leaks.

Breaking backward compatibility:

none

---

发行说明：

我们发布了新版本 3.21.10.0。
首先，我们必须感谢以下人士对我们社区的贡献：@13611582598, @mwhei , @lenovore, @jmbkeyes.

特性：

• [#2866] 支持单个dble脱离/回归集群. 更多详细信息，请参见 doc.
• [#2844] 支持默认的分片模式 [alpha功能]。更多详细信息，请参见doc.
• [#2845] 新的流量控制：添加后端读取水位。更多详细信息，请参见doc.

缺陷修复:

• [#11] EPollArrayWrapper.epollWait 可能导致 100% CPU。
• [#2896] show @@dbInstance 命令，READ_LOAD 和 WRITE_LOAD 始终显示为 0.
• [#2747] fakeMySQLVersion 不支持 MariaDB 10.x，感谢@lenovore 报告此问题。
• [#2750] 支持add/truncate/dop partition , 感谢@13611582598 报告此问题。
• [#2611] 优化er表问题，感谢@jmbkeyes 报告错误。
• [#2828] 三表join，结果可能有误，感谢@mwhei 报告bug。
• 有时复杂的查询可能会导致内存泄漏。

和旧版本的不兼容项：

无