Java Multithreading and Parallel Programming Masterclass - Managing Rejected Tasks in a ThreadPool

The video tutorial explains how tasks can be rejected in a thread pool when all worker threads are busy, the pool size is at its maximum, and the queue is full. It demonstrates creating a sleeping task to fill the thread pool and discusses handling rejected tasks using try-catch blocks or a rejected execution handler. The tutorial also covers implementing a custom handler and explores default and custom policies for managing task rejection, such as abort, caller run, and discard policies.

What is a rejected execution handler and how is it used?

How does the default handler for a thread pool executor behave when a task is rejected?

What is the purpose of the caller run policy in a thread pool?