He Liangliang created HBASE-13249:
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Summary: Concurrency issue in SnapshotFileCache
Key: HBASE-13249
URL: https://issues.apache.org/jira/browse/HBASE-13249
Project: HBase
Issue Type: Bug
Reporter: He Liangliang
Assignee: He Liangliang
In refreshCache, if step 3 fails for some reason, the successive call may
return success directly but the cache is already corrupt (got cleared in the
previous failed call):
{quote}
// 1. update the modified time
this.lastModifiedTime = lastTimestamp;
// 2.clear the cache
this.cache.clear();
Map<String, SnapshotDirectoryInfo> known = new HashMap<String,
SnapshotDirectoryInfo>();
// 3. check each of the snapshot directories
{quote}
This will cause files got deleted unexpectedly.
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