A daily scheduled staging publish will not work next month if it is scheduled on the 30th

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.0.X EE, 6.1.X EE, 6.2.X EE, 7.0.0 M7
• Fix Version/s: 6.1.X EE, 6.2.4 CE GA5, 6.2.X EE, 7.0.0 M7
• Component/s: Portal Services, Portal Services > Scheduler, Staging
• Labels:
  • liferay-fixpack-portal-67-6210
• Branch Version/s:
  6.2.x, 6.1.x
• Backported to Branch:
  Committed
• Story Points: 24
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/28842

Description
A scheduled staging publish will not work next month if it is scheduled on the 30th

Issue
Original logic: dayOfMonth += StringPool.FORWARD_SLASH + interval;
Problem: If the day of the month is the 30th, we will create a cron interval of 30/1. Meaning run everyday starting on the 30th. So next month, the schedule will start on the 30th, rather than on the first.
Proposed Solution: Change to: dayOfMonth = 1 + StringPool.FORWARD_SLASH + interval;
So we start the interval on the first of the month.

Steps to Reproduce

1. Start a clean bundle of Liferay 6.2 with the latest patch installed.
2. Change the date on your computer to 6/30/2015.
3. On the default site, enable local live staging (also reproduced in remote live).
4. On the Staging site, click publish > Schedule > Enter date (6/30/2015) and the time for 5 minutes in the future.
5. Select "Daily" to ensure the publish will occur at the specified time every day. Save.
6. Add a web content display
7. Change the date on your computer to 7/1/2015 (without restarting).
8. Log back into the portal if needed.
9. Wait for the scheduled publish time and then refresh the live site to see if the changes were published.

Expected Result: The publish will go through at the scheduled time.
Actual Result: The publish does not go through

Run a groovy script to note the "SchedulerEngineHelperUtil.getNextFireTime()" and note that after the first publish, it's next fire time is July 30th, rather than July 1st.

Branch 62x - fc0e3be7804c4453818eb2a1972717563eb41980: Reproduced
Master - 1dc5757b612c985268735dc6561efab4fe77004e: Reproduced