User-166373564 posted
Hi,
'Multiple simultaneous connections or connections with different connection strings inside the same transaction are not currently supported.
As I mentioned in your previous post, MySQL supports multiple connection transactions in single connection string, but it can’t support multiple connection transactions in multiple database transactions, please check whether you use this properly,
There is a blog below, it give a few examples to demonstrate this issue, I think it will be helpful for you to understand it better,
http://www.cnblogs.com/nielsliu/articles/1280038.html
Regards