From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-07-21T23:18:42+09:00
Subject: Re: [BUG] Segmentation fault with a threads/forks script

On Thu, 21 Jul 2005, Lucas Nussbaum wrote:

> 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.

o.k. - now it crashed on 1.8.2.  i can't ulimit on the 1.9 box.

-a
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