How to stop the execution of Executor ThreadPool in java?

user_131062 0
Viewed 42855

I am working on the Executors in java to concurrently run more threads at a time. I have a set of Runnable Objects and i assign it to the Exceutors.The Executor is working fine and every thing is fine.But after all the tasks are executed in the pool ,the java program is not terminated,i think the Executor takes some time to kill the threads.please anyone help me to reduce the time taken by the executor after executing all tasks.

concurrent-programming
2 Answers

executor.shutdown() with awaitTermination(timeout) does not kill threads. (ie), if your runnable task is inside a polling loop, it does not kill the task. All it does is to interrupt its runnable tasks when the timeout is reached. So, in the code for your runnable class, if you wait on some condition, you may want to change the condition as,

while (flagcondition && !Thread.currentThread().isInterrupted()) {}

This ensures that the task stops when the thread is interrupted as the while loop terminates. Alternately, you might want to catch the interrupted exception and set flag=false in the catch block to terminate the thread.

try {
    // do some stuff and perform a wait that might throw an InterruptedException
} catch (InterruptedException e) {
    flagcondition = false;
}

You might also want to use a profiler to examine why some threads have not proceeded to completion.

user_8274790
Related