[HDDS-306] Add functionality to construct OpenContainerBlockMap on datanode restart

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Do
• Component/s: Ozone Datanode
• Target Version/s: 0.3.0
• Assignee: Shashikant Banerjee
• Reporter: Shashikant Banerjee
• Created: 31/Jul/18 07:06
• Updated: 13/Oct/18 06:12
• Resolved: 13/Oct/18 06:12

Description

OpenContainerBlockMap contains list of blocks which are not committed on a Datanode. In case the Datanode restarts, we may need to reconstruct this map by reading block layout for each container and verifying it with the container DB. This is required to close the container on a single dataNode as well as for Ozone garbage collection