Possible reasons for the automatic exit of a Java program when it is running for a long time

I have a Java program that starts with seven threads, all of which are shaped like this:

public void run() {
while (true) {
try {
......
} catch (Throwable t) {
t.printStackTrace();
}
}
}

But often running, running for a few hours after the Java exit, what may be the reason?

I guess it was my own code or where I used the library to invoke System.exit (), but I hook the system.exit () with the program, and found that no one called the function. This server is the only one I use, and no one will kill. Java people to help think about what else might be the reason?

Reply:

If it is applied, there are generally 2 possible

1 JVM bugs, this simple, upgrade your JVM just fine

2 memory overflow, oh, I guess this is the most likely. You should start the tool to monitor the program's memory usage, jconsole.