[SPARK-25303] A DStream that is checkpointed should allow its parent(s) to be removed and not persisted

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Incomplete
• Affects Version/s: 2.0.0, 2.0.1, 2.0.2, 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.1, 2.2.2, 2.3.0, 2.3.1
• Component/s: DStreams
• Labels: Streaming bulk-closed streaming
• Flags: Important
• Assignee: Unassigned
• Reporter: Nikunj Bansal
• Shepherd: Tathagata Das
• Created: 01/Sep/18 08:05
• Updated: 25/May/21 01:50
• Resolved: 25/May/21 01:43

Description

A checkpointed DStream is supposed to cut the lineage to its parent(s) such that any persisted RDDs for the parent(s) are removed. However, combined with the issue in SPARK-25302, they result in the Input Stream RDDs being persisted a lot longer than they are actually required.

See also related bug SPARK-25302.

Issue Links

• links to: [Github] Pull Request #22424 (nikunjb)
• links to: GitHub Pull Request #22424