Description of problem:
During shutdown, TransactionTable unregisters itself as a view change listener, but it can still receive view change notifications after it stopped the executor service.
The exception is harmless for the stopping cache, the problem is that the following view change listeners are also skipped. We should fix both TransactionTable to avoid throwing the exception, and CacheManagerNotifier to ignore any exceptions during view changes.
This bug was accidentally moved from POST to MODIFIED via an error in automation, please see mmccune with any questions