FULL PRODUCT VERSION :
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Mac OS X 10.9.5

A DESCRIPTION OF THE PROBLEM :
The popular bluebird.js promise library uses a plain javascript object like an array for its Queue object. When it removes an item from the queue, it sets the value to undefined.
Under Nashorn the reference to the item in the queue is not removed; instead it uses a UndefinedArrayFilter to just hide it. Since this 'queue' is large, many thousands of these items remain referenced.

See the bluebird js source here: https://github.com/petkaantonov/bluebird/blob/master/src/queue.js


ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b25)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Hack bluebird to place a 'null' instead of undefined when dequeuing, or use a smaller queue size.