id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
18534	[Possible Patch] Some locations cause JOSM jnlp to freeze when opening the `Imagery` menu	taylor.smock	team	"This ''may'' be Mac OS X only.

The issue appears to be on ImageProvider.java#858 -- cache remains locked by another thread indefinitely.

Is there a reason why we aren't using `java.util.concurrent.ConcurrentHashMap` instead of `java.util.HashMap`? Or an actual lock object? I know I've gotten warnings from some lint tools about using `synchronized (map)` in the past.

Alternatively, we could just wrap it in a `Collections.synchronizedMap`.

Please note that ''I have not'' tested it yet -- I need to figure out how to run a `jnlp` from a local source. I may end up having to spin up a server for it.


Steps to reproduce:
1) Start josm.jnlp (josm-latest.jnlp works as well)
2) 'https://api.openstreetmap.org/api/0.6/map?bbox=-47.8898656,-15.8114964,-47.8875375,-15.8092976' is the test area
3) Open `Imagery` menu"	defect	new	normal		Applet	latest		jnlp, imagery