Release 3.21.06.2

Release Notes:

We have released a bug-fixed version 3.21.06.2.

Bug-fixes:

• Execute dbGroup @@disable name ='dbGroup1';，sometimes hang.
• When create connection failed，totalConnection will be wrong and lead to the connection leak.
• When status of instance of mysql changed from disable to active，dble may still hang
• Sometimes complex query may cause memory leak.
• [#2873]The problem of set autocommit=true
• The problem of manager command show @@connection.sql
• When cluster mode, execute ddl may hang
• show @@dbInstance command, READ_LOAD and WRITE_LOAD are always displayed as 0.

发行说明：

我们发布了3.21.06.2,这是个基于3.21.06.0的bug修复版本

问题修复:

• 执行dbGroup @@disable name ='dbGroup1';偶现hang住
• 连接创建失败时，连接数统计的问题导致的连接泄漏
• mysql实例从disable到active状态后，dble 不可用
• 有时复杂的查询可能会导致内存泄漏。
• [#2873]set autocommit=true 的问题
• 管理端口执行show @@connection.sql报错
• 集群环境下dble执行ddl语句hang住
• show @@dbInstance 命令，READ_LOAD 和 WRITE_LOAD 始终显示为 0.