---
title: "StackOverflowError in Java, and how does it occur?"  
description: "StackOverflowError in Java, and how does it occur?"  
author: "Steilla Mitchel"  
published: 2023-07-23  
updated: 2023-07-23  
canonical: https://www.mindstick.com/forum/159247/stackoverflowerror-in-java-and-how-does-it-occur  
category: "java"  
tags: ["exception handling", "java", "exception"]  
reading_time: 3 minutes  

---

# StackOverflowError in Java, and how does it occur?

What is the StackOverflowError in [Java](https://www.mindstick.com/articles/12214/web-development-company-in-india-laid-on-the-foundation-of-concrete-java-programming), and how does it occur?

## Replies

### Reply by Aryan Kumar

A StackOverflowError in Java is a runtime error that occurs when the JVM runs out of stack space. The stack is a data structure that the JVM uses to store the call stack for each thread. The call stack is a record of the methods that have been called, along with their arguments and return values.

A StackOverflowError can occur for a number of reasons, but the most common cause is recursion. Recursion is a programming technique where a method calls itself. This can be a useful technique for solving certain problems, but it can also lead to StackOverflowErrors if the recursion is not properly controlled.

Another cause of StackOverflowErrors is having a large number of local variables in a method. Each local variable takes up space on the stack, so if there are too many local variables, the stack can overflow.

Finally, StackOverflowErrors can also occur if an application has cyclic relationships between classes. This can happen when the constructors of two classes call each other recursively.

To fix a StackOverflowError, you need to identify the cause of the error. If the error is caused by recursion, you need to either modify the code so that the recursion is terminated, or increase the stack size of the JVM. If the error is caused by a large number of local variables, you need to reduce the number of local variables in the method. If the error is caused by cyclic relationships between classes, you need to modify the code so that the constructors do not call each other recursively.

Here are some tips for avoiding StackOverflowErrors:

- Use recursion sparingly.
- Avoid having a large number of local variables in a method.
- Be aware of cyclic relationships between classes.
- Increase the stack size of the JVM if necessary.

If you are getting StackOverflowErrors in your code, you can use the following steps to debug the error:

1. Look at the stack trace. The stack trace will show you the call stack at the point where the error occurred. This can help you identify the method that is causing the error.
2. Add breakpoints to your code. Breakpoints will allow you to stop the execution of your code at a specific point. This can be helpful for inspecting the call stack and local variables at the point where the error occurred.
3. Use a debugger. A debugger is a tool that can help you step through your code line by line. This can be helpful for tracking down the source of the error.


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Original Source: https://www.mindstick.com/forum/159247/stackoverflowerror-in-java-and-how-does-it-occur

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