In my Java web application, I am using a ScheduledThreadPoolExecutor to periodically check the database connection status.

final ScheduledExecutorService executor = Executors.newScheduledThreadPool(0);
       
Runnable task = new Runnable() {
     public void run() {
          //check the status of the database connection, and log the result
     }
};

        
executor.scheduleWithFixedDelay(task, 0, 10, TimeUnit.MINUTES);

However, when I logout from the web application, and close the browser window, I see (from the logs) that it is still checking for connection status.

Is there any way to terminate this executor/thread upon closing the web application?

CodePudding user response：

I'm not sure to have fully understood the question, but in the section for exiting from the application, you probably should do the following

executor.shutdown();
    try { executor.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { }

Hoping it'll help

CodePudding user response：

Thread pool lives on

The thread pool of an executor service may continue running after its parent app has ended. This includes web apps.

So you should always do a graceful shutdown of the executor when exiting the app. Otherwise the backing thread(s) may continue running indefinitely, like a zombie