[KAFKA-12233] Align the length passed to FileChannel by `FileRecords.writeTo`

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0
• Assignee: Deng Ziming
• Reporter: Deng Ziming
• Created: 25/Jan/21 05:40
• Updated: 27/Jan/21 04:51
• Resolved: 27/Jan/21 04:51

Description

https://github.com/apache/kafka/pull/2140/files#r563471404

we set `int count = Math.min(length, oldSize)`, but we are expected to write from `offset`, so the count should be `Math.min(length, oldSize - offset)`.

Issue Links

• links to: GitHub Pull Request #9970