intelljj importing maven project causes computer to freeze

Locally use: mac+git+maven3.5+intelljj3.7+switchhost+jdk1.8 for development As shown in the
figure :


Whether it is to checkout out the git project directly in intelljj, or first git clone on the hard disk and then open/ through intelljj import, will be stuck in the picture above, and the java process will continue to occupy 100% of the cpu through the activity manager, and soon, the entire computer will be stuck.

In the end, it was found that switchhost must be configured as follows:
127.0.0.1 localhost

After configuring 127.0.0.1 localhost, the problem is solved, and the reason is unknown. Here is a reminder.