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https://issues.apache.org/jira/browse/HBASE-407?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Duxbury updated HBASE-407:
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Attachment: 407-v4.patch
Removed unneeded imports and comments from HConnectionManager, moved
declaration of cachedRegionLocations all to one place.
Cleaned bookend debug logging from SoftSortedMap, and improved get and remove
so that they can handle nulls better.
If the GC nulls a reference between checkReferences and the actual get, it
doesn't matter; the SoftValue will still be in the map, and get() will return
null. However, I wasn't taking into account the situation when the key being
checked for actually wasn't in the map, so that could have let to some NPEs.
> Client should cache region locations in an LRU structure
> --------------------------------------------------------
>
> Key: HBASE-407
> URL: https://issues.apache.org/jira/browse/HBASE-407
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: client
> Reporter: Bryan Duxbury
> Assignee: Bryan Duxbury
> Attachments: 407-v2.patch, 407-v3.patch, 407-v4.patch, 407.patch
>
>
> Instead of keeping the region locations cached client side in a TreeMap, we
> should use an LRU mechanism to help manage memory more dynamically.
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