What reasons might cause us to terminate the application when manually starting threads?

Manually launching threads in Java can lead to several issues that may cause the application to crash:

• Thread overload: OS and JVM have limits on the number of threads that can run simultaneously. Creating too many threads manually can exhaust resources, leading to OutOfMemoryError or failure to create new threads.

• Incorrect thread lifecycle management: If threads do not terminate properly or exceptions are not handled, the application may hang or crash.

• Synchronization issues: Without proper synchronization, race conditions can occur, leading to unpredictable behavior and crashes.

• Lack of thread pool usage: Manually creating threads instead of using ExecutorService results in inefficient resource utilization and potential leaks.

Example of proper thread pool usage:

ExecutorService executor = Executors.newFixedThreadPool(10);
executor.submit(() -> {
    // task code
});
executor.shutdown();