> -----Original Message-----
> From: centos-bounces@xxxxxxxxxx
> [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of Michael Schumacher
> Sent: Wednesday, March 17, 2010 9:00
> To: CentOS mailing list
> Subject: Re: cron.hourly runs twice
>
> Timothy,
>
> On Wednesday, March 17, 2010 you wrote:
>
> >>> For some reason I cannot fathom,
> >>> cron.hourly runs twice each hour
> >>> on one of my two CentOS-5.4 systems,
>
Need to get a look into the runtime environment:
Add this to the cron.hourly
#!/bin/sh
pstree -up >> /tmp/foo.log
Next hour look at the parents (and their pids).
> Here comes a very weird idea. I don't know the internals of
> the cron-daemon good enough to know if this can actually happen.
> If you have a NTP-job every hour started by cron that
> corrects the internal time and if your internal clock runs
> too fast, the system time may be reset every hour so that the
> cron-job will start twice. As I said, I don't know if
> cron-daemon has a mechanism that would avoid that problem.
>
>
> best regards
> ---
> Michael Schumacher
> PAMAS Partikelmess- und Analysesysteme GmbH Dieselstr.10,
> D-71277 Rutesheim Tel +49-7152-99630 Fax +49-7152-996333
> Geschäftsführer: Gerhard Schreck
> Handelsregister B Stuttgart HRB 252024
>
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