[KAFKA-13319] Do not send AddOffsetsToTxn/TxnOffsetCommit if offsets map is empty

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.1.0
• Labels: newbie
• Assignee: Guozhang Wang
• Reporter: Jason Gustafson
• Created: 23/Sep/21 00:21
• Updated: 13/Oct/21 18:39
• Resolved: 12/Oct/21 20:34

Description

If a user calls `Producer.sendOffsetsToTransaction` with an empty map of offsets, we can shortcut return and skip the logic to add the offsets topic to the transaction. The main benefit is avoiding the unnecessary accumulation of markers in __consumer_offsets.

Issue Links

• links to: GitHub Pull Request #11362