NPE in PreferencesContext on Windows when no /omero/prefs/ is defined

[jamoore]

Under Linux and Mac, the /omero/prefs/ preferences node is created by the prefs.class during startup (bin/omero admin). On Windows, bin/omero admin creates the node as the current user, but "local user" actually runs the server and so finds no preferences node, which leads to a NPE when this.path is null.

Caused by: java.lang.NullPointerException
	at java.util.prefs.AbstractPreferences.node(Unknown Source)
	at ome.system.PreferenceContext.getProperty(PreferenceContext.java:93)
	at ome.system.PermissionsContext.<init>(PermissionsContext.java:30)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)
	... 57 more

[jmoore]

r4661 should fix this issue. Long-term the better solution may be to have a better control over which user runs the server, since this is an issue we've run into over and over again.