3.0.0.1 databas not ready

[xzavierlauml]

3个虚拟机，windows server2016环境，3个dnodes：

创建3个副本的database：

create database if not exists test replica 3;

创建成功后，使用desc查看数据库发现Database not ready的错误：

查看服务端taosdlog，发现sync timeout:

09/07 14:16:08.798000 00007040 SYN vgId:62, sync timeout, type:election count:323, electTimerLogicClockUser:323
09/07 14:16:09.364000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:10.867000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:12.374000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:13.253000 00003732 SYN vgId:63, sync timeout, type:election count:324, electTimerLogicClockUser:324
09/07 14:16:13.877000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:15.381000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:16.703000 00007040 SYN vgId:62, sync timeout, type:election count:324, electTimerLogicClockUser:324
09/07 14:16:16.885000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:18.238000 00003732 SYN vgId:63, sync timeout, type:election count:325, electTimerLogicClockUser:325
09/07 14:16:18.388000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:19.891000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:21.394000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:21.688000 00007040 SYN vgId:62, sync timeout, type:election count:325, electTimerLogicClockUser:325
09/07 14:16:22.469000 00003732 SYN vgId:63, sync timeout, type:election count:326, electTimerLogicClockUser:326
09/07 14:16:22.900000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:24.408000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:25.919000 00007040 SYN vgId:62, sync timeout, type:election count:326, electTimerLogicClockUser:326
09/07 14:16:25.922000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:27.422000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:28.931000 00008288 MND queries updated in conn 3627456547, num:0
09/07 14:16:29.698000 00003732 SYN vgId:63, sync timeout, type:election count:327, electTimerLogicClockUser:327
09/07 14:16:30.436000 00008288 MND queries updated in conn 3627456547, num:0

仔细查了下端口6030-6042（TCP/UDP）都已打开。为什么会同步超时？还有什么线索能追踪到底是什么问题吗？

[yu285]

建议先清理数据更新到 ，3.0.1.0 。底层做了很多优化调整

[yu285]

3.0早期版本的bug 都已经都修复了，但是3.0.2.5 之前可能与现在的最新版（3.3.0.0）并不兼容，所以无法直接升级。因此建议重新部署一下最新的 3.3.0.0 ，后续升级都很方便，直接安装最新版软件即可。

开源版支持操作系统范围：https://docs.taosdata.com/reference/support-platform/