@Override
    public void memberDeparted(DistributionManager distributionManager,
        final InternalDistributedMember id, final boolean crashed) {
      if (id.equals(targetMember)) {
        targetMemberHasLeft = true;
      }
      super.memberDeparted(distributionManager, id, crashed);
    }
process the failure set from sending the message
geode-core/src/main/java/org/apache/geode/internal/cache/StateFlushOperation.java