The current error handling framework introduced in
HBASE-6571 adds a lot of complexity for what is essentially a solved problem. Specifically, cross-thread notifications have been generalized for the JMX tooling in the javax.management classes.
Similar to what we developed, they have a NotifciationBroadcaster, NotificationListener, etc. though these are interfaces rather than general classes. These javax classes can be used almost 1-to-1 as replacements for things like the ExceptionOrchestrator and ExceptionListener. This also gives us the opportunity to easily add primitive notifications for standard HBase things like (1) timeouts, (2) aborts, and (3) server stops since the framework already considers things like typed notifications.