[KAFKA-12551] Refactor Kafka Log layer

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: core
• Assignee: Kowshik Prakasam
• Reporter: Kowshik Prakasam
• Created: 25/Mar/21 07:35
• Updated: 25/Mar/21 07:37

Description

This is an umbrella Jira that tracks the work items for for Log layer refactor as described here: https://docs.google.com/document/d/1dQJL4MCwqQJSPmZkVmVzshFZKuFy_bCPtubav4wBfHQ/edit?usp=sharing .

Sub-Tasks

• Extract segments map out of Log class into separate class: Resolved
• Refactor Log layer recovery logic: Resolved
• Split Log layer into Log and LocalLog: Resolved
• Eliminate LeaderEpochFileCache constructor dependency on LogEndOffset: Resolved
• Eliminate Log.isLogDirOffline boolean attribute: Resolved
• Evaluate moving replaceSegments into LogSegments class: Open
• Fix LogLoader to pass materialized view of segments for deletion: Resolved
• Rename Log to UnifiedLog: Resolved
• Eliminate temporary ProducerStateManager in Log recovery logic: Open