CompletableFuture eventual race condition

Pavel Rappo pavel.rappo at
Mon Jul 11 19:29:40 UTC 2016

> On 11 Jul 2016, at 18:44, Francois Green < at> wrote:
> I sorry for posting in list, but I need an authoritative answer.  I was
> told by one of the developers of another JVM (Ceylon) language that
> CompletableFuture.supplyAsync(() -> "Hejjo Worjd from Java")
>        .thenApply(s -> s.replaceAll("j","l"))
>        .thenAccept(System.out::println);
> would eventual fail to print if run enough times.  Is this true?

Your snippet looks correct to me.

You could use jstress [1] to try to catch the alleged bug. And in case you
succeed, you could then produce a sscce as Martin suggested.


More information about the core-libs-dev mailing list