hue查询hive连接数升高，之后无法继续提交查询

[#1]

使用hue查询时，并发并不高，只有几个人，但是hue的连接数很高，且不释放连接，之后无法提交任务，通过beeline也不能连接到hive，查看mysql连接数并没有到替换，使用非hue连接的hiveserver2可以正常连接

[#2]

Here is the English translation:

The hue query hive connection number increases, and then the query cannot be submitted

When using hue query, the concurrency is not high, there are only a few people, but the number of connections of the hue is very high, and the connection is not released, then the task cannot be submitted, and the hive cannot be connected through beeline. Check that the number of mysql connections has not been replaced, use Non-hue connected hiveserver2 can connect normally