👀 Views: 769 💬 Answers: 1 📅 Created: 2025-06-05

java spring-batch recursion Java

I'm dealing with Hey everyone, I'm running into an issue that's driving me crazy. I'm working on a personal project and I'm working with a `StackOverflowError` when executing a Spring Batch job that processes a hierarchical dataset. The job involves recursively processing parent-child relationships in my entities, and it seems that deep nesting is causing the stack to overflow. Here's a simplified version of my code: ```java public void processParent(Parent parent) { // Process the parent entity System.out.println("Processing parent: " + parent.getId()); for (Child child : parent.getChildren()) { processChild(child); } } public void processChild(Child child) { // Process the child entity System.out.println("Processing child: " + child.getId()); if (child.hasMoreChildren()) { processParent(child.getNextParent()); // Recursive call } } ``` In my job configuration, I’m using a chunk-oriented processing approach: ```java @Bean public Job myJob() { return jobBuilderFactory.get("myJob") .start(step1()) .build(); } @Bean public Step step1() { return stepBuilderFactory.get("step1") .<Parent, Parent>chunk(10) .reader(parentItemReader()) .processor(parentProcessor()) .writer(parentItemWriter()) .build(); } ``` I've tried increasing the stack size using `-Xss` JVM option, but that only pushes the question further. The dataset can have a maximum depth of around 50, and while I expect recursion to handle this, it seems the way I'm navigating through parents and children is leading to excessive recursion. Is there a better design pattern I should be using here? Should I consider an iterative approach or perhaps queue-based processing instead? Any guidance on how to refactor this to avoid the `StackOverflowError` would be greatly appreciated! My development environment is Ubuntu. Thanks in advance! My development environment is Windows. How would you solve this? My development environment is Windows 10. What's the best practice here? This is my first time working with Java latest. Am I approaching this the right way? For context: I'm using Java on Windows 10. Hoping someone can shed some light on this.