Ray Mattingly created HBASE-28810:
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Summary: BackupLogCleaner is difficult to debug
Key: HBASE-28810
URL: https://issues.apache.org/jira/browse/HBASE-28810
Project: HBase
Issue Type: Bug
Affects Versions: 2.6.0, 2.6.1
Reporter: Ray Mattingly
While implementing HBase's incremental backups across a few hundred clusters,
we continue to step on some rakes. Now and again, we find old WALs piling up
due to a poorly cleaned up BackupInfo, or a bug in the BackupLogCleaner, etc.
The BackupLogCleaner is difficult to debug for a couple of reasons:
# It has a lack of useful debug logging
# It has [a misleadingly named
method|https://github.com/HubSpot/hbase/blob/2d08fa67dfe9458260bc0be3ebc7bbd769850190/hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/master/BackupLogCleaner.java#L83-L83]
(this method returns the newest backup ts, not the oldest)
I'm going to introduce a small refactor that will alleviate these pain points.
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