From: Lucas Nussbaum <lucas@...>
Date: 2005-07-21T23:09:51+09:00
Subject: Re: [BUG] Segmentation fault with a threads/forks script

On Thu, Jul 21, 2005 at 10:50:00PM +0900, "Ara.T.Howard" <Ara.T.Howard@noaa.gov> wrote:
> On Thu, 21 Jul 2005, Lucas Nussbaum wrote:
> 
> >Hi,
> >
> >I experience a reproducable crash (each time) with prunner.rb at
> >http://blop.info/bazaar/prunner.rb. The script starts several commands
> >at the same time. When running with a large number of commands, it
> >exits with :
> >
> >./prunner.rb:51: [BUG] Segmentation fault
> >ruby 1.8.2 (2005-04-11) [i386-linux]
> >
> >Aborted
> >
> >To reproduce, create a large file with one command per line.
> >for i in $(seq 1 2000); do echo hostname done > cmds
> >Then run prunner.rb like this :
> >cat cmds |head -n 1500 |./prunner.rb
> >1500 can be increased if it doesn't crash for you.
> >
> >Of course, I expect it to go wrong at some time, but it could probably
> >do this in a cleaner way.
> >
> >Can somebody confirm the bug ? Or better, fix it ? :-)
> 
> 
> seems to work on 1.8.2 for values around 1000:
> 
> [...]
>
> did you compile ruby yourself or use some installer/package-manager?

I tested using Debian's and Ubuntu's packages.
What if you ulimit -n 16384 first ?
Does it still work ?
It worked for me with values around 1000 too. But after increasing the
ulimit for open files, it started crashing.
-- 
| Lucas Nussbaum
| lucas@lucas-nussbaum.net   http://www.lucas-nussbaum.net/ |
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