[HBASE-21784] Dump replication queue should show list of wal files ordered chronologically

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.2.0, 1.4.10, 2.3.0, 2.1.5, 1.3.5
• Component/s: Replication, tooling
• Labels: Replication
• Hadoop Flags: Reviewed
• Release Note: The DumpReplicationQueues tool will now list replication queues sorted in chronological order.
• Assignee: Wellington Chevreuil
• Reporter: Wellington Chevreuil
• Created: 25/Jan/19 16:14
• Updated: 07/Oct/19 18:30
• Resolved: 14/May/19 21:40

Description

The wals znodes under a given replication queue znode are not listed in an ordered way. To make troubleshooting easier, when analysing replication stuck scenarios, the wal files from each queue listed by DumpReplicationQueues could be sorted by chronologically order. Attaching a patch with such change, as well a unit test that validates this.