Checking whether all tasks in ThreadPoolExecutor are completed

Question

How can I check whether all tasks submitted to ThreadPoolExecutor are completed?

New tasks can be added from previously submitted tasks, so I can't call shutdown followed by awaitTermination nor invokeAll, as it will ignore these new tasks.

Related but different problem so not quite a dupe - stackoverflow.com/questions/3929361/… — djechlin
– djechlin, Commented May 14, 2013 at 21:38

assylias · Accepted Answer · 2013-05-15 09:31:39Z

7

yourThreadPoolExecutor.getActiveCount(); will return 0 when all tasks have completed.

answered May 15, 2013 at 9:31

assylias

330k84 gold badges680 silver badges806 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

borjab Over a year ago

I have a flacky test that may be related to using this. Reading the documenttion states that this number is an aproximation: "Returns the approximate number of threads that are actively executing tasks".

Evgeniy Dorofeev · Accepted Answer · 2013-05-15 01:40:53Z

1

You can use ThreadPoolExecutor.getCompletedTaskCount()

answered May 15, 2013 at 1:40

Evgeniy Dorofeev

137k31 gold badges209 silver badges288 bronze badges

Collectives™ on Stack Overflow

Checking whether all tasks in ThreadPoolExecutor are completed

2 Answers 2

1 Comment

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Linked

Related