BlockCache interface should be truly modular
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Key: HBASE-4017
URL: https://issues.apache.org/jira/browse/HBASE-4017
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: Li Pi
Currently, the if the BlockCache that used isn't an LruBlockCache, somewhere in
metrics will try to cast it to an LruBlockCache and cause an exception. The
code should be modular enough to allow for the use of different block caches
without throwing an exception.
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