Can a StackOverflowError occur in a multithreaded environment?

Yes, a StackOverflowError can occur in a multithreaded environment, although it's less common. It typically happens if a thread's recursive calls exceed the thread's stack size. This could be due to deeply nested calls or poorly designed thread synchronization mechanisms. IntelliJ's debugging features can be applied to threads individually, allowing you to examine the stack trace for the specific thread experiencing the error.