1. Problem description
Tomcat runs web project (which relies on Java projects) and a lot of the above warnings appear. The project cannot be raised.
Keyword memory leak
2. Solution
Is there something wrong with the program writing?
Finally, the memory is increased in the tomcat VM parameter and solved it
-Xms512m -Xmx512m -Xmn300m -Xss2048k -XX:PermSize=512m -XX:MaxPermSize=512m
It needs to be adjusted according to the configuration of the machine