Ray Mattingly created HBASE-28687:
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Summary: BackupSystemTable#checkSystemTable should ensure that the
backup system tables are enabled
Key: HBASE-28687
URL: https://issues.apache.org/jira/browse/HBASE-28687
Project: HBase
Issue Type: Improvement
Affects Versions: 2.6.0
Reporter: Ray Mattingly
If the backup system tables become disabled, then we enter a state which the
backup client will not recover from. Without manual intervention, every
subsequent backup attempt will fail on [BackupSystemTable's calls to
waitForSystemTable|https://github.com/apache/hbase/blob/3a3dd66e21da3f85c72d75605857713716d579fb/hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupSystemTable.java#L214-L215].
This checkSystemTable method already ensures that the tables exist — it should
also ensure that the tables are enabled before we await that condition.
Alternatively, we could fast-fail if the tables are disabled rather than
awaiting an enabled state that will never occur.
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