[FLINK-4525] Drop the "eager split pre-assignment" code paths

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.2
• Fix Version/s: 1.2.0
• Component/s: Runtime / Coordination
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 29/Aug/16 09:59
• Updated: 28/Feb/19 14:02
• Resolved: 29/Aug/16 16:12

Description

There is currently an interface for input splits StrictlyLocalAssignment that is half-heartedly supported in the JobManager (it is, for example, not fault tolerant).

I suggest to drop these special cases for the following reasons:

• they do not fit the assumptions of all the rest of the system well (localize where possible, but never constrain)
• they make the logic of implemented as part of dynamic resource acquisition hard
• they are not fully implemented even today
• I am not aware of anyone using this feature
• It is complicated to maintain