[HDFS-13331] Add lastSeenStateId to RpcRequestHeader.

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-12943
• Fix Version/s: HDFS-12943, 3.3.0
• Target Version/s: HDFS-12943
• Hadoop Flags: Reviewed
• Assignee: Plamen Jeliazkov
• Reporter: Plamen Jeliazkov
• Created: 22/Mar/18 22:12
• Updated: 24/Dec/18 18:26
• Resolved: 04/Apr/18 22:47

Description

HDFS-12977 added a stateId into the RpcResponseHeader which is returned by NameNode and stored by DFSClient.

This JIRA is to followup on that work and have the DFSClient send their stored "lastSeenStateId" in the RpcRequestHeader so that ObserverNodes can then compare with their own and act accordingly.

This JIRA work focuses on just the part of making DFSClient send their state through RpcRequestHeader.