Is there a compelling reason to throw an exception when re-releasing a client?

[kurtmilam]

Unless there's a compelling reason to throw when a developer calls client.release more than once, I'd prefer to see client.release mutate itself into a noop the first time it's called - that would be better for developer ergonomics.

Related question: Is there an easy way to determine whether a client has already been released (easier than wrapping client.release() in a try...catch block and ignoring the exception)?

[charmander]

a compelling reason to throw when a developer calls client.release more than once

It’s a mistake and hiding mistakes is bad.

Related question: Is there an easy way to determine whether a client has already been released (easier than wrapping client.release() in a try...catch block and ignoring the exception)?

No, because the pool might return the same client again, as the same object. (It should probably be changed so it returns wrapped clients instead of direct client objects in the next major.)