[FALCON-378] Feed status fails with NPE post update when the new coordinator is in PREP state

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.4
• Fix Version/s: 0.5
• Component/s: oozie
• Labels: oozie
• Assignee: Venkatesh Seetharam
• Reporter: Venkatesh Seetharam
• Created: 25/Mar/14 23:11
• Updated: 26/Mar/14 06:43
• Resolved: 26/Mar/14 06:43

Description

An NPE is thrown for status calls post feed update briefly between the new coord creation transitioning from PREP to RUNNING at:

org.apache.falcon.workflow.engine.OozieWorkflowEngine#getCoordActions
                Date iterEnd = (coord.getNextMaterializedTime().before(end) ? coord.getNextMaterializedTime() : end);

coord.getNextMaterializedTime() is null since the coord is in PREP state as the new coord's effective time is set as now() + 3 min. In reality, this is greater than 3 mins is my observation.

Feed updated at:
Current time = Tue, 25 Mar 2014 21:54:00 GMT

Old Coord: 
Start time = Tue, 25 Mar 2014 00:00:00 GMT
End time = Tue, 25 Mar 2014 22:00:00 GMT
Status = RUNNING

New Coord:
Start time =  Tue, 25 Mar 2014 22:00:00 GMT
End time = Wed, 26 Mar 2014 00:00:00 GMT
Status = PREP