What are the reasons for memory overflow in Tomcat?

There are several reasons for Tomcat memory overflow:

1. Memory leak: If there is a memory leak in an application, where objects are not properly released when no longer in use, it can result in continuously increasing memory usage and ultimately lead to a memory overflow.
2. Excessive memory usage: If an application uses too much memory when processing large amounts of data, exceeding the system’s available memory limit, it can also lead to a memory overflow.
3. Infinite recursion: If there is an infinite recursion situation in the application program, where a method continuously calls itself, it can lead to a stack overflow, ultimately resulting in a memory overflow.
4. Improper memory configuration: If Tomcat’s memory allocation is not properly set, such as insufficient heap and non-heap memory to support the application’s operation, it can also result in a memory overflow.
5. External resources not released: If an application uses external resources such as database connections, file streams, etc., and does not properly release these resources after use, it can also lead to memory overflow.

To address the issue of Tomcat memory overflow, it can be resolved by optimizing the application code, adjusting the memory configuration of Tomcat, or using memory analysis tools.