multiple instances using cron

jw schultz jw at
Fri Jul 18 17:04:05 EST 2003

On Fri, Jul 18, 2003 at 02:49:20PM +0800, Matthew Healey wrote:
> Hi all,
> I have searched high and low on the web and this mailing list and 
> cannot find anything similar to the problems I am seeing.
> I have the following two commands set up in cron (as root) to run at 
> midnight (under MacOS X Server 10.2.6).
> rsync -av --progress --delete --progress --size-only 
> /Volumes/mirrors/mirrors/cpan
> rsync -av --progress --delete --progress --size-only 
> /Volumes/mirrors/mirrors/macgamefiles
> Individually these commands work fine, but when I run them under cron, 
> they seem to get executed over and over until the server dies. Each 
> time the process runs, it opens yet another connection to the remote 
> server.
> I was wondering if there is any problem with running two instances of 
> rsync at the same time, or if their is something going wrong that makes 
> cron think that the process hasn't started, and thus tries again...
> I have tried putting the commands into a shell script to force them to 
> execute one after the other, rather than at the same time but that 
> doesn't seem to fix it either..
> I can't seem to find anything relevant with google as I don't think I 
> am explaining myself correctly, or using the correct terminology.
> Any help or pointers would be appreciated.

It sounds like you've botched the crontab entry or OSX has a
serious bug in cron. 

	J.W. Schultz            Pegasystems Technologies
	email address:		jw at

		Remember Cernan and Schmitt

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