Zach York created HBASE-21070:
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Summary: SnapshotFileCache won't update for snapshots stored in S3
Key: HBASE-21070
URL: https://issues.apache.org/jira/browse/HBASE-21070
Project: HBase
Issue Type: Bug
Components: snapshots
Affects Versions: 3.0.0, 2.1.1, 1.4.7
Reporter: Zach York
Assignee: Zach York
The SnapshotFileCache depends on last modified time to determine whether to
update the Snapshot HFile cache. However, in S3, real 'folders' don't exist. S3
filesystems create a dummy file in place of a folder, but the dummy file last
modified time is not updated when files are changed 'under' it. This means that
the SnapshotFileCache doesn't pick up new snapshot HFiles and these files
aren't removed from the HFileCleaner and can be eligible for deletion.
My patch removes the lastmodified assumption.
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