Problems with Nginx Tomcat session missing

Nginx Reverse proxy Tomcat, there is a problem that seesion cannot get.

Most of the solutions found on the Web are clustered Tomcat sharing session sharing, but I have only one Tomcat server, which does not involve server cluster issues.

But also find the most reliable Ip_hash scheme tried, because the configuration when accidentally equipped with the root path, so in the test when manually added project name access to normal, the session is also normal ...

Considering the situation just now, it should be that the agent has a more project name resulting in inconsistent session paths, so there are two solutions:

Block out project name

Specify a cookie path for the project

Problems with Nginx Tomcat session missing