[HBASE-15647] Backport HBASE-15507 to 0.98

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.98.18
• Fix Version/s: 0.98.19
• Component/s: Replication
• Hadoop Flags: Reviewed
• Release Note: Added update_peer_config to the HBase shell and ReplicationAdmin, and provided a callback for custom replication endpoints to be notified of changes to their configuration and peer data
• Assignee: Geoffrey Jacoby
• Reporter: Geoffrey Jacoby
• Created: 13/Apr/16 21:41
• Updated: 20/Apr/16 17:20
• Resolved: 18/Apr/16 23:16

Description

HBASE-15507 introduced an update_peer_config method to allow online changes to replication config. It depended on HBASE-11393, which so far exists only in master and can only be in 2.0 and above because of some incompatible changes to replication peer config serialization.
To get this in 0.98 will require two things:
1. Port the PeerConfigTracker in HBASE-11393 to 0.98 without taking the incompatible tableCF serialization changes.
2. Port HBASE-15507's logic on top of this.

Most of this work was done in HBASE-15633 for branch-1, but 0.98 is just different enough to need some tweaks of its own.