Keith Turner created ACCUMULO-4788:
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Summary: Improve Thrift Transport pool
Key: ACCUMULO-4788
URL: https://issues.apache.org/jira/browse/ACCUMULO-4788
Project: Accumulo
Issue Type: Improvement
Reporter: Keith Turner
Fix For: 2.0.0
Accumulo has a pool of recently opened connections to tablet servers. When
connecting to tablet servers, this pool is checked first. The pool is built
around a map of list. There are two problems with this pool :
* It has global lock around the map of list
* When trying to find a connection it does a linear search for a non reserved
connection (this is per tablet server)
Could possibly move to a model of having a list of unreserved connections and a
set of reserved connections per tablet server. Then to get a connection, could
remove from the unreserved list and add to the reserved set. This would be a
constant time operation.
For the locking, could move to a model of using a concurrent map and locking
per tserver instead of locking the entire map.
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