OK... I am changing it to use an executor. I will start with a single-threaded executor. We can change it later if we want more than one depage thread working at any time.

I have one executor being created at PagingManagerFactoryNIO. That executor is shared with all the PagingStores (i.e. all the addresses):

Before change:

 public PagingManagerFactoryNIO(final String directory)
 {
 this.directory = directory;
 this.executor = Executors.newSingleThreadExecutor();
 }

 public PagingManagerFactoryNIO(final String directory)
 {
 this.directory = directory;
 this.executor = Executors.newCachedThreadPool(new JBMThreadFactory("JBM-depaging-threads"));
 }