churro morales created HBASE-11360:
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Summary: SnapshotFileCache refresh logic based on modified
directory time might be insufficient
Key: HBASE-11360
URL: https://issues.apache.org/jira/browse/HBASE-11360
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.19
Reporter: churro morales
Right now we decide whether to refresh the cache based on the lastModified
timestamp of all the snapshots and those "running" snapshots which is located
in the /hbase/.hbase-snapshot/.tmp/<snapshot> directory
We ran a ExportSnapshot job which takes around 7 minutes between creating the
directory and copying all the files.
Thus the modified time for the
/hbase/.hbase-snapshot/.tmp directory was 7 minutes earlier than the modified
time of the
/hbase/.hbase-snapshot/.tmp/<snapshot> directory
Thus the cache refresh happens and doesn't pick up all the files but thinks its
up to date as the modified time of the .tmp directory never changes.
This is a bug as when the export job starts the cache never contains the files
for the "running" snapshot and will fail.
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