[SAMZA-1083] Do not load task stores which are older than delete tombstones during container startup

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Assignee: Shanthoosh Venkataraman
• Reporter: Shanthoosh Venkataraman
• Created: 08/Feb/17 04:07
• Updated: 09/Feb/17 00:09
• Resolved: 09/Feb/17 00:08

Description

Every local task store is backed up by a kafka changelog topic. Due to log compaction, delete tombstones of the changelog topic have a ttl of delete.retention.ms. Replaying the events from the changelog that has missing delete tombstones, would result in creation of an inconsistent local store(due to the missing of some delete events). This patch deletes the local stores in which difference between current time and last modified time of the offset file is greater than delete.retention.ms during the container startup.