Was not able to find the cause of the problem -- all of the DiscoveryProvider subclasses check for null before calling this listener method. I added a warn log message with a stack trace in the event ...
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:569) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1015) Could not open ...