[SPARK-25495] FetchedData.reset doesn't reset _nextOffsetInFetchedData and _offsetAfterPoll

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.4.0
• Component/s: Structured Streaming
• Labels: correctness
• Target Version/s: 2.4.0
• Assignee: Shixiong Zhu
• Reporter: Shixiong Zhu
• Created: 21/Sep/18 00:14
• Updated: 25/Sep/18 18:43
• Resolved: 25/Sep/18 18:43

Description

FetchedData.reset doesn't reset _nextOffsetInFetchedData and _offsetAfterPoll and causes inconsistent cached data and may make Kafka connector return wrong results.

Issue Links

• links to: [Github] Pull Request #22507 (zsxwing)
• links to: [Github] Pull Request #22507 (zsxwing)