Does this mean we need to call (shutdown-agents) whenever we use futures
(internally or explicitly)?
I've never had any problems with clojure.java.shell/sh or pmap, albeit
i've not used them extensively...
Jim
On 09/05/12 12:16, Muharem Hrnjadovic wrote:
Thank you very much indeed!
On 05/08/2012 11:14 PM, Andy Fingerhut wrote:
I've added some discussion about this behavior in an example for
clojure.core/future on ClojureDocs.org here:
http://clojuredocs.org/clojure_core/clojure.core/future
Since people often come across this behavior when using pmap or
clojure.java.shell/sh, which are implemented using Clojure futures, I've added
examples to those two functions that recommend reading the examples for future.
Andy
On May 8, 2012, at 11:18 AM, Andy Fingerhut wrote:
Not desired, but currently normal behavior.
This happens whenever certain concurrency features of Clojure are used,
creating other threads, and they take a while for them to be cleaned up on
exit. Besides pmap, futures and a few other Clojure functions cause this. You
can work around it if you call (shutdown-agents) before the end of your program.
http://dev.clojure.org/jira/browse/CLJ-124
Andy
On May 7, 2012, at 3:16 PM, Muharem Hrnjadovic wrote:
Hello there!
I only started learning Clojure today, so please forgive me if this is
a stupid question or something..
I am experimenting with Clojure's pmap operator as shown in the source
here:
https://github.com/freizeit/exercises/blob/master/cj-a-store-credit/clojure/ex1.clj
With line 14 (the exit() call) in place the program takes a second to
run:
$ time clojure -m ex1 /etc/motd
#<LinkedBlockingQueue [110, 60]> /etc/motd
real 0m1.013s
user 0m1.284s
sys 0m0.032s
With line 14 commented out or removed the program prints this part
immediately:
$ time clojure -m ex1 /etc/motd
#<LinkedBlockingQueue [110, 60]> /etc/motd
*but* the rest comes a minute later:
real 1m0.997s
user 0m1.336s
sys 0m0.080s
Is this normal/desired behaviour? If not, can somebody please explain
why this is happening? Thanks!
FWIW, I am observing this with Clojure 1.3.0 on debian (LMDE [1]).
[1] http://www.linuxmint.com/download_lmde.php
Best regards/Mit freundlichen Grüßen
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