When a key is flushed for a non-existent entry the flush is not propagated to other nodes in a cluster.

The event should be broadcast to ensure that nodes which _do_ have an entry for the key are notified that they have stale data.

The problem is in Cache.flushEntry (note the TODO):

if (!entry.isNew()) {
            // Update the entry's state in the map
            cacheMap.put(key, entry);

// Trigger an ENTRY_FLUSHED event
            CacheEntryEvent event = new CacheEntryEvent(this, entry, origin);
            dispatchCacheEntryEvent(CacheEntryEventType.ENTRY_FLUSHED, event);
        } else {
            // The entry did not exist in the cache anyway, nothing to flush
            // TODO: Do we need an event for this?
        }