[Octave-bug-tracker] [bug #41619] parcellfun can cause octave to hang indefinitely

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?41619>

                 Summary: parcellfun can cause octave to hang indefinitely
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mo 17 Feb 2014 08:30:26 UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
             Assigned to: None
         Originator Name: Florian Kühnlenz
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.6.4
        Operating System: GNU/Linux

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Details:

I had some troubles with octave hanging (never finishing its script) on some
occasions. It only occurred on every 1000-5000 start of octave and was not
reproducible. It turned out that is was a logic failure in parcellfun.

Sometimes one of the forked processes took so long to start that the first
process was handed two jobs and the slow starting process never got any job.
This in turn results in the slow starting process never getting send a 0
signal to spin down. Which caused the main thread to hang indefinitely on
waitpid. 

I will attach my fixed version, but I assume you guys may can come up with a
better solution than just adding another array to keep track of the processes
that got send a spin down signal. 

 



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File Attachments:


-------------------------------------------------------
Date: Mo 17 Feb 2014 08:30:26 UTC  Name: parcellfun.m  Size: 13kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=30585>

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