[HDDS-203] Add getCommittedBlockLength API in datanode

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.2.1
• Component/s: Ozone Client, Ozone Datanode
• Assignee: Shashikant Banerjee
• Reporter: Shashikant Banerjee
• Created: 28/Jun/18 13:43
• Updated: 25/Jul/18 21:16
• Resolved: 25/Jul/18 08:48

Description

When a container gets closed on the Datanode while the active Writes are happening by OzoneClient, Client Write requests will fail with ContainerClosedException. In such case, ozone Client needs to enquire the last committed block length from dataNodes and update the OzoneMaster with the updated length for the block. This Jira proposes to add to RPC call to get the last committed length of a block on a Datanode.