CODEWITHSUNDEEP
javamultithreading
Vinod Jayachandran
Vinod Jayachandran

Reputation: 3898

Is thread returned to threadpool of executor service if future task throws exception?

I have simple use case of ThreadPoolExecutor. I want to ensure during the thread execution if there is any kind of run time exception, Will threads be returned back to the pool or not. How to verify ?

ExecutorService pool = Executors.newFixedThreadPool(30);
pool.submit(new MyThread())
boolean jobExecutionStatus =true 
try{
       for (Future<Boolean> future : futureArrayList){
                if (jobExecutionStatus){
                    jobExecutionStatus = future.get();
                }
                else{
                    break;
                }

            }
        }
        catch (InterruptedException | ExecutionException e){
            jobExecutionStatus = false;
        }

Upvotes: 1

Views: 172

Answers (1)

Davide Lorenzo MARINO
Davide Lorenzo MARINO

Reputation: 26926

No, if an Exception is thrown a new Thread will be created (only if necessary).

From javadoc:

If any thread terminates due to a failure during execution prior to shutdown, a new one will take its place if needed to execute subsequent tasks.

Upvotes: 1

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