Cron expressions: leading zeros ok?

Posted by JimBurnell on Stack Overflow See other posts from Stack Overflow or by JimBurnell
Published on 2010-04-16T15:42:37Z Indexed on 2010/04/16 15:43 UTC
Read the original article Hit count: 222

Filed under:

cron

|

quartz-scheduler

|

cronjob

A quartz-scheduled process did not kick off last evening.

The only thing that looks like it MIGHT be off is that, in one entry:

0 00 23 13,15 APR ?

The "minutes" field is specified as a 2-digit 00 rather than a single-digit 0.

I can't find any definitive cron documentation saying whether or not this would cause a problem.

I can't test it again until the off-hours.

Anyone know for sure if this could be a problem? if so, it's rather a silly one.

© Stack Overflow or respective owner

Related posts about cron

any clue in these logs why keyboard audio and internet are messed up

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Jun 7 00:01:18 Isis lightdm: pam_unix(lightdm-autologin:session): session opened for user mimi by (uid=0) Jun 7 00:01:18 Isis lightdm: pam_ck_connector(lightdm-autologin:session): nox11 mode, ignoring PAM_TTY :0 Jun 7 00:01:26 Isis polkitd(authority=local): Registered Authentication Agent for… >>> More
cron.daily not running at the time it should?

as seen on Server Fault - Search for 'Server Fault'
My /etc/cron.daily scripts seem to be executing far later from what I understand they should. I am in Ubuntu and anacron is installed. If I do a sudo cat /var/log/syslog | grep cron I get something like: Aug 23 01:17:01 mymachine CRON[25171]: (root) CMD ( cd / && run-parts --report /etc/cron… >>> More
mdadm cron job sends email that cron has run

as seen on Server Fault - Search for 'Server Fault'
I've got an Ubuntu 8.04 server using mdadm to create several RAID1 arrays. I created /etc/cron.hourly/mdadm as follows: #! /bin/sh set -e mdadm --monitor /dev/md0 /dev/md3 /dev/md4 --oneshot (Yes, the array numbers are not sequential, and I'm not using --scan beacuse I have a degraded array that… >>> More
Cron Tips for not running cron jobs on holidays (the monday of a three day weekend)

as seen on Super User - Search for 'Super User'
We have about a one hundred machine set-up with each machine running cron jobs like starting and stopping services and archiving these services' log files at the end of the day to a centralized repository. One headache we have is the three-day weekend (we're closed on holidays). We don't want the… >>> More
cron doesn't execute it's commands

as seen on Server Fault - Search for 'Server Fault'
I created an own small server with Debian. Last night i updated it. It created an error while generating the initrd and it didn't boot. Today i booted from another filesystem and did dpkg --configure -a with chroot. I also checked the filesystem. Now everything should be ok. But cron doesn't work:-(… >>> More

Related posts about quartz-scheduler

Quartz scheduler is failing to start the cron job

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I am using Quartz scheduler to trigger a cron which needs to perform a host of activities. My Code for the same is as follow: In the init() method of my InitServlet class, I am defining my TimerServer public class InitServlet extends HttpServlet { public void init(ServletConfig config)… >>> More
Quartz Scheduler - Not running the task

as seen on Stack Overflow - Search for 'Stack Overflow'
I am working on scheduling the tasks using Quartz API. I tried scheduling notepad.exe and in the logs, I see the following line - org.quartz.jobs.NativeJob runNativeCommand About to runcmd.exe /C c:/WINDOWS/notepad.exe ... But the notepad is not coming up. Same is the issue with any exe or batch… >>> More
Problem with Writing files using FileWriter automatically with Quartz Scheduler

as seen on Stack Overflow - Search for 'Stack Overflow'
I have chosen nearly 200 files to write on a position automatically on a particular time. Created a separate job names in Quartz scheduler. The job will be triggered on a time. I can read the files only after all the files have been written. I could not read after one file is written. I have closed… >>> More
How to maintain a job history using Quartz scheduler

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to maintain a history of jobs that were scheduled by a Quartz scheduler containing the following properties: 'start time', 'end time', 'success', 'error'. There are two interfaces available for this: ITriggerListener and IJobListener (I'm using the C# naming convention for interfaces because… >>> More
Quartz.NET Instance Handling Problem

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have 2 instances which implements 2 different instance IDs in 2 different windows services as: //windows service 1 instance 1 properties["quartz.scheduler.instanceName"] = "instanceName1"; properties["quartz.scheduler.instanceId"] = "instanceID1"; //windows service 2 instance 2 properties["quartz… >>> More