Bad Request, Your browser sent a request that this server could not understand

Question

There are two application servers and a switch. When i access application by using application server ip it works fine. However if i use switch ip in my url Bad request erro

Answer 1

in my magento2 website ,show exactly the same error when click a product,

my solution is to go to edit the value of Search Engine Optimization - URL Key of this product,

make sure that there are only alphabet,number and - in URL Key, such as 100-washed-cotton-duvet-cover-set, deleting all other special characters ,such as % .