Manukranth Kolloju created HBASE-10808:
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Summary: Simplify Leases by using a ConcurrentHashMap
Key: HBASE-10808
URL: https://issues.apache.org/jira/browse/HBASE-10808
Project: HBase
Issue Type: Bug
Components: Scanners
Affects Versions: 0.89-fb
Reporter: Manukranth Kolloju
Assignee: Manukranth Kolloju
Priority: Minor
Fix For: 0.89-fb
This fix simplifies the Leases to use a ConcurrentHashMap instead of a
DelayQueue so as to avoid the Synchronization cost. The LeaseChecker now should
check the ConcurrentHashMap periodically to check if a scanner has been
inactive for atleast the max time. This has a weaker guarantee on when the
lease will be expired but is more efficient and decreases the amount of
contention.
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