Is there any reason that the ThreadPoolExecutor used in HTable[1] couldn't be a singleton. That would mean that by default htables share threads (as I would argue is correct), but still give advanced users the ability to override this using the more explicit[2] constructor.
1. https://github.com/apache/hbase/blob/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java#L183 2. https://github.com/apache/hbase/blob/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java#L202 Thanks
