Upgrading Spring framework to v5.3.x increased memory usage for DefaultListableBeanFactory
Article ID: 410636
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Issue/Introduction
On this particular example a Spring app was upgraded from version 5.2.3.RELEASE to Spring version 5.3.31.RELEASE
We took a heapdump from a version of the App running v5.2.3 and also heapdump from a version of the App Running v5.3.31.
From the heap dump we noticed that org.springframework.beans.factory.support.DefaultListableBeanFactory has a retained heap size of 50MB in 5.2 and only 27MB in version 5.2
Environment
Spring Framework version 5.3.31
Resolution
The larger memory footprint in Spring Framework 5.3 is to be expected, since additional caching was introduced in various core components such as ResolvableType and DefaultListableBeanFactory.
However, based on the simulations that the memory footprint is stable and does not increase exponentially.
The memory footprint does not appear to grow out of bounds with thousands of requests hitting the system over time.
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