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https://issues.apache.org/jira/browse/HBASE-27796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell updated HBASE-27796:
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Hadoop Flags: Reviewed
Resolution: Fixed
Status: Resolved (was: Patch Available)
> Improve MemcachedBlockCache
> ---------------------------
>
> Key: HBASE-27796
> URL: https://issues.apache.org/jira/browse/HBASE-27796
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.5.4
> Reporter: Andrew Kyle Purtell
> Assignee: Andrew Kyle Purtell
> Priority: Major
> Fix For: 2.6.0, 3.0.0-alpha-4, 2.5.5
>
>
> MemcachedBlockCache is apparently not used, given the bugs I have found, but
> provides some useful functionality that we are investigating at $dayjob. Fix
> it.
> - Track and log better stats
> - Fix use of memcached API such that we are not accidentally immediately
> expiring keys.
> - Use a default retention period of 30 days, the max per memcached spec
> - Use set instead of add to store keys
> - Gracefully handle failures to cache and read timeouts
> - Add unit tests using jmemcached as a test dependency
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