[KAFKA-740] Improve crash-safety of log segment swap

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: log
• Labels: reliability
• Assignee: Jay Kreps
• Reporter: Jay Kreps
• Created: 29/Jan/13 03:16
• Updated: 27/May/20 21:00

Description

Currently Log.replaceSegments has a bug that can cause a swap containing multiple segments to partially complete. This would lead to duplicate data in the log.

The proposed fix is to use a name like offset1_and_offset2.swap for a segment meant to replace segments with base offsets offset1 and offset2.