private void recordDroppedEvent(EntryEventImpl event) {
    if (eventProcessor != null) {
      eventProcessor.registerEventDroppedInPrimaryQueue(event);
    } else {
      tmpDroppedEvents.add(event);
      if (logger.isDebugEnabled()) {
        logger.debug("added to tmpDroppedEvents event: {}", event);
      }
    }
  }
Check if this event can be distributed by senders.

@return boolean True if the event is allowed.
geode-core/src/main/java/org/apache/geode/internal/cache/wan/AbstractGatewaySender.java