Github user HeartSaVioR commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/575#issuecomment-167718475
Though it works like charm, Jedis recommends users to handle that thing
since it reduces performance.
(Jedis implements Closeable to hide handling code.)
Btw, I don't think it applies to Zeppelin since count of RPC call is
relatively small. Maybe it would be possible to apply testOnBorrow.
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