Fixing 'run out of handles'

One user community tend to have vast datasets, with many thousands of items to be displayed in the layer manager.

They've had Debrief freezing, displaying a 'SWTError: No more handles'.

I've investigated the leak (suspected to be associated with the Layer Manager), and found an instance where I was doing a createImage for each item displayed in the Layer Manager.  I should be getting these items from a cache/registry.  I fixed the problem, then found out about 'sleak' the SWT Leak Detector.

I then re-inserted the problem, checked the monster leaks with sleak, fixed the problem, and checked that the problem had gone away.

Here's an article on it , and a more formal article.

It worked just great.