[gambit-list] Too many open files with process

Adam King akingcoder at gmail.com
Fri Sep 9 17:22:21 EDT 2011


I placed a #gc in two different locations (before and after each call to
(do-process)), but still the same error message.  I also tried with a
compiled version, same issue.  Thanks for the suggestion though.

  Adam


On Fri, Sep 9, 2011 at 5:16 PM, Mikael <mikael.rcv at gmail.com> wrote:

> (While making a real solution to the problem, and as a part of debugging,
> run ##gc right at the end of each do-process . Does it have any effect?)
>
> 2011/9/9 Adam King <akingcoder at gmail.com>
>
>> I need to descend a directory structure with ~5000 files in it and run an
>> external process on each to gether information on each file.  However, after
>> running over about 250 files, I get a "Too many open files" error.  250 is
>> probably OSX default max open file limit - but I don't understand why the
>> 'with-input-from-process' doesn't appear to be closing its file handle?  I
>> also tried with 'open-input-process' and 'open-process' and manually calling
>> 'close-input-port' but didn't help.  Here's a small script that shows the
>> exact same prob:
>>
>> (define (test-fn)
>>
>>   (define (do-process)
>>     (with-input-from-process (list path: "pwd") read-all))
>>
>>   (let loop [(count 2000)]
>>     (if (> count 0)
>>         (begin
>>           (do-process)
>>           (loop (- count 1)))
>>         (println "Done"))))
>>
>>
>> (test-fn)
>>
>> And the output:
>>
>> bigmac:iosTexConverter aking$ gsc -v
>> v4.6.1 20110519175028 i386-apple-darwin10.8.0 "./configure
>> /usr/local/Gambit-C/share/config.site /usr/local/Gambit-C/etc/config.site"
>>
>> bigmac:iosTexConverter aking$ gsi ./test.scm
>> *** ERROR IN loop, "test.scm"@9.11 -- Too many open files
>> (with-input-from-process '(path: "pwd") '#<procedure #2 read-all>)
>> bigmac:iosTexConverter aking$
>>
>> Running latest from the Gambit git repo and OSX 10.6.8.  As far as I can
>> tell, calling 'pwd' shouldn't be leaving around open file handles.  I also
>> checked the process-status, and it was 0.  Any suggestions?
>>
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>>
>
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