Memory Fully utilized by Java ConcurrentHashMap (under Tomcat)

Question

This is a memory stack (serves as a cache) that consist of nothing but a static ConcurrentHashMap (CHM).

All incoming HTTP request data are store in this Concurrent

Answer 1

If you get this exception and are using spring boot version 1.4.4 RELEASE or lower, set value of property "server.session-timeout" in minutes, rather than what they suggest (seconds), so that the sessions on the heap will be cleaned in time. Or you can use a bean of EmbeddedServletContainerCustomizer but the provided value will be set in minutes.

example (session timeout in 10 minutes): server.session-timeout=10 (set in properties file) container.setSessionTimeout(10, TimeUnit.SECONDS); (set in EmbeddedServletContainerCustomizer)