[PATCH] JDK-8054565: FilterOutputStream.close may throw IOException if called twice and underlying flush or close fails

[Pavel Rappo]

> Hello,
> 
> also using a stream in a multi threaded way is quite unusual most of
> the implementations I have seen use a atomic solution.

Bernd, as far as I understand we are not talking about concurrent-proof solution
for the j.i.FilterOutputStream as this class is sure not even thread-safe. Most
of the subclasses provide their own implementation of close. If they feel they
should be thread-safe it's their responsibility to support it.

> Let me add a comment that those stream classes are all heavily
> overloaded in all parts of code. I think this kind of change is pretty
> risky (and most people fixed this and other close insanities in the
> derived methods anyway). Unfortunatelly. (remeber the
> SupressionException problem?)

I can’t see why this particular change is risky. We're just trying to make the
java.io.FilterOutputStream.close obey the java.io.Closeable.close contract.

-Pavel