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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Richard, I first reported on the bug on 2008-04-01. Apple responded on the same day and on 2008-04-17, 2008-10-15, 2008-12-14, 2008-12-15, 2009-02-25, 2009-08-13, 2009-08-15, and 2009-09-28 (that was the last time I heard from them). The bug ID is 5834488 and is still marked "Open". The title of the bug is "fcntl$UNIX2003() hangs in Mac OS X 10.5 and 10.6". I reported that the bug still exists in Mac OS X 10.6 on 2009-09-02. I used Apple's bug-reporting site <https://bugreport.apple.com>. The problem is that a process that's attempting to lock the product-queue via a system call to fcntl() using the F_SETLKW (lock wait) option hangs -- even if it's the only process doing any locking! Interestingly, the bug does not exist in Mac OS X 10.4. Regards, Steve On 10/28/2010 01:26 PM, Richard Ryan wrote: > Hi, > > I'm curious about a few things. Did you report the bug to Apple > and did they give you a reply? I'm interested in any reply they > may have sent you. These are where I think those bugs are supposed > to be submitted: > > http://www.apple.com/feedback/macosx.html > > http://www.apple.com/feedback/server.html > > Also I was wondering what fcntl operations broke. > > Thanks, > Richard Ryan > > > On 10/28/10 1:08 PM, Justin Greenfield wrote: >> We experimented with running LDM on OS X, both Leopard and Snow Leopard. >> Installation is fairly straightforward, I think we had to tweak a couple of >> the perl scripts, but nothing difficult. When working, it works like a champ. >> >> But.... >> >> The killer is there's a bug in OS X that locks up the product queue on a >> call to fcntl. We tried various configurations, file systems, etc, to work >> around this bug, for months and months. >> >> Sometimes it would hit the bug within a few hours of startup, sometimes it >> would go for weeks before it locked up. But inevitably, it got hung up. >> Sampling the process in this state always revealed the same thing: stuck in >> the bowels of fcntl. >> >> We encountered it on 10.5 and 10.6. We wrote all kinds of scripts to detect >> the hung process and restart the daemon, and they worked most of the time, >> but sometimes the only solution was to reboot the machine. >> >> In the end, it just wasn't going to be reliable enough, which is a true >> shame, because there are a lot of things we'd love to do with OS X. We gave >> up and ported our stuff to run on linux. >> >> It's possible that a subsequent OS X update has fixed the issue, but I >> wouldn't bet on it. >> >> Justin >> >> >> On Oct 28, 2010, at 1:01 PM, Richard A. Ryan wrote: >> >>> Hi again, >>> >>> The last thing I wrote only mentioned how dscl replaces the >>> /etc configurations. It turns out launchd/launchctl commands >>> and files also replace some of the functionality of what's in >>> /etc, and I'm guessing there are probably other things. The >>> /etc/services file's functionality has something to do with >>> launchd/launchctl rather than dscl. >>> >>> Again, for the Mac mini, if you want to do server type things >>> on it you might want to get the Mac mini preloaded with >>> Mac OS X Server because the user/group/account/networking/server >>> related command line calls are a bit hard to figure out. The >>> O'Reilly book ``Mac OS X for Unix Geeks'' doesn't seem to cover >>> everything and they also don't have a version for Snow Leopard. >>> >>> Richard Ryan >>> >>> >>>> -------- Original Message -------- >>>> Subject: [ldm-users] LDM on Mac OS X >>>> Date: Wed, 27 Oct 2010 14:00:43 -0500 >>>> From: Tyler Allison <tyler@xxxxxxxxxxxxxxxx> >>>> To: ldm-users@xxxxxxxxxxxxxxxx >>>> Anybody running or been successful in running LDM on Mac OS X? >>>> I'm considering playing with a MacMini as a small SOHO device running LDM. >>>> I don't want to drop $1000 on a paper weight :) So hopefully someone >>>> else has been there/done that. >>>> -Tyler >>>> _______________________________________________ >>>> ldm-users mailing list >>>> ldm-users@xxxxxxxxxxxxxxxx >>>> For list information or to unsubscribe, visit: >>>> http://www.unidata.ucar.edu/mailing_lists/ >>> >>> _______________________________________________ >>> ldm-users mailing list >>> ldm-users@xxxxxxxxxxxxxxxx >>> For list information or to unsubscribe, visit: >>> http://www.unidata.ucar.edu/mailing_lists/ >> > > _______________________________________________ > ldm-users mailing list > ldm-users@xxxxxxxxxxxxxxxx > For list information or to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/
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