Groups > comp.lang.java.programmer > #34017

Re: ExecutorService.shutdown ambiguity

Path	csiph.com!news.swapon.de!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From	Jeff Higgins <jeff@invalid.invalid>
Newsgroups	comp.lang.java.programmer
Subject	Re: ExecutorService.shutdown ambiguity
Date	Fri, 18 Mar 2016 20:52:38 -0000 (UTC)
Organization	A noiseless patient Spider
Lines	34
Message-ID	<nchpqm$dat$1@dont-email.me> (permalink)
References	<02moebljqki662mrgr8f6ga85uhj2lt14s@4ax.com>
Mime-Version	1.0
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	8bit
Injection-Date	Fri, 18 Mar 2016 20:52:38 -0000 (UTC)
Injection-Info	mx02.eternal-september.org; posting-host="e689d4a62ab06da9e54b78e64d3e802f"; logging-data="13661"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/a3pmq1TvFw+mjN+asOC1UH8t+N0BWAbs="
User-Agent	Pan/0.139 (Sexual Chocolate; GIT bf56508 git://git.gnome.org/pan2)
Cancel-Lock	sha1:2x4Vj5mYBhEVsFkqyWDF93GS4Hc=
Xref	csiph.com comp.lang.java.programmer:34017

Show key headers only | View raw

On Fri, 18 Mar 2016 12:37:13 -0700, Roedy Green wrote:

> Here is the JavaDoc for ExecutorService.shutdown.
> To me it is ambiguous. How do you read it?
> 
> What happens to a task in queue? 

"... previously submitted tasks are executed ..."

> What happens to a task that is executing?

Presumably it continues executing.
However ExecutorService.shutdown() returns without awaiting completion.
 
> 
>      * Initiates an orderly shutdown in which previously submitted *
>      tasks are executed, but no new tasks will be accepted.
>      * Invocation has no additional effect if already shut down.
>      *
>      * <p>This method does not wait for previously submitted tasks to *
>      complete execution.  Use {@link #awaitTermination
> awaitTermination}
>      * to do that.
>      *
>      * @throws SecurityException if a security manager exists and *     
>         shutting down this ExecutorService may manipulate *        
>      threads that the caller is not permitted to modify *        
>      because it does not hold {@link *        
>      java.lang.RuntimePermission}{@code ("modifyThread")}, *         or
>      the security manager's {@code checkAccess} method *         denies
>      access.
>      */
>     void shutdown();

Thread

ExecutorService.shutdown ambiguity Roedy Green <see_website@mindprod.com.invalid> - 2016-03-18 12:37 -0700
  Re: ExecutorService.shutdown ambiguity Jeff Higgins <jeff@invalid.invalid> - 2016-03-18 20:52 +0000
  Re: ExecutorService.shutdown ambiguity v_borchert@despammed.com (Volker Borchert) - 2016-03-18 20:20 +0000
  Re: ExecutorService.shutdown ambiguity Kevin McMurtrie <mcmurtrie@pixelmemory.us> - 2016-03-19 23:07 -0700

csiph-web