[FLINK-19087] ResultPartitionWriter should not expose subpartition but only subpartition-readers

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: Runtime / Network
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 28/Aug/20 11:41
• Updated: 28/Aug/20 15:36
• Resolved: 28/Aug/20 15:13

Description

The ResultPartitionWiter currently gives arbitrary access to the sub-partitions.

These subpartitions may not always exist directly, such as in a sort based shuffle.
Necessary is only the access to a reader over a sub-partition's data (the ResultSubpartitionView).

In the spirit of minimal scope of knowledge, the methods should be scoped to return readers, not the more general subpartitions.