neo4j/neo4j — pull request #2871 by chrisvest (2014-08-15 14:57:58+00:00)
Title: Fix races on shutdown in Muninn

The Muninn eviction thread did not anticipate that closing the page cache would
set all the MuninnPage references in the `pages` array to `null`, and so it
could die with a NullPointerException.

It now interprets the precense of a `null` value as a signal to shut down.