Limit the maximum queue_size for fixed thread pools?

[jasontedor]

Dynamically adjustable queue_sizes for thread pools can in general be a useful feature for users to tune depending on their cluster utilization. However, as queue_size tends to Integer.MAX_VALUE, the value of this turns negative. So perhaps we should set a upper bound on queue_size beyond which it can not be set?

Relates #11511, relates #14367 (cf. comment from @dakrone)

[bleskes]

I thinks makes sense.

[s1monw]

there is another issue I closed lately related to this: #3890
I think we can do much better by computing some sensible limit based on the throughput and make that the default?

[s1monw]

but hey we maybe should do both.... Lets just do 1024 and be done with it

[ppf2]

+1 on at least setting an upper bound. have seen quite a few cases in the field where users have set queue sizes to unlimited or some ridiculous number like 1 million+

[nik9000]

If you set the queue size to less than 0 on a fixed thread pool you'll get an unbounded queue.