Quartz Scheduler - Cron Trigger expression not working

Question

I am using Quartz scheduler in order to schedule some sequence of functionalities in my java project. I want the scheduler to start at 08:00:00 and to repeat for every four hours till 16:00:00. I have tried doing this using CRONTrigger with below expression:

"0 0 8,12,16 * * ?"

But it is not working fine as expected. Please help me in resolving this. Thanks in advance.

Answer 1

Try the next:

0 0 8,12,16 ? * *

Whit this, CronMaker show the next sample scheduled dates:

1. Wednesday, May 29, 2013  8:00 AM
2. Wednesday, May 29, 2013 12:00 PM
3. Wednesday, May 29, 2013  4:00 PM
4. Thursday,  May 30, 2013  8:00 AM
5. Thursday,  May 30, 2013 12:00 PM

Answer 2

Hey you can visit http://www.cronmaker.com/ in this site you can create your cron expression or test this one. or you can try this 0 0 8,12,16 1/1 * ? * 0 0 8,12,16 1/1 * ? *