Dieter De Paepe created HBASE-28705:
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Summary: BackupLogCleaner cleans required WALs when using multiple
backuproots
Key: HBASE-28705
URL: https://issues.apache.org/jira/browse/HBASE-28705
Project: HBase
Issue Type: Bug
Components: backup&restore
Affects Versions: 2.6.0, 4.0.0-alpha-1
Reporter: Dieter De Paepe
The BackupLogCleaner is responsible for avoiding the deletion of WAL/logs that
still need to be included in a future backup.
The logic to decide which files can be deleted does not work correctly when
multiple backup roots are used. Each backup root has a different chain of
backups (full, incremental1, incremental2, ...). So, if any chain requires a
log, it should be preserved. This is not the case.
The result is that logs could be incorrectly deleted, resulting in data loss in
backups.
PR incoming with test & fix.
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